Re: [Emc-users] pico servo driver
Cathrine Hribar wrote: > > > > HI John: > > How much is the pico servo driver boards? > > Do they require a brakeout board? > I am not sure what boards you are referring to. We have a Universal PWM Controller, and PWM-input servo amplifiers for both brush and brushless motors. The servo amplifiers are not step/direction drives, and are not suitable for use with software step generation. They are usually used with our PWM Controller board, which handles up to 4 axes. You do not use a breakout board, as the PWM controller board brings out the signals you need. The Universal PWM Controller is $250. The brush PWM amplifiers is $125, the brushless version is $150. We have a number of other options, too. Please see our web store at http://pico-systems.com/oscrc4/catalog/index.php?cPath=3 Thanks, Jon -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
Igor Chudov wrote: > man hdparm > OK, thanks. Wow, too many options there! But, I think I see that it is the APM settings that I want to change. > I use rdiff-backup, it is great and is incremental. > OK, have to read up on that. Thanks! Jon -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
Igor Chudov wrote: > Those old PCs need to be refitted with new hard drives every time. I > would expect this atom box to use 20-25 watts of power also. Reports > of their reliability are overblown. I used a Dell Dimension 4100 on my > Bridgeport Interact and it would occasionally fail to boot, for > example. I still have this Dimension. > Dimension is the home-use class of machines. I have never understood what the difference is, but people who ought to know tell me there really IS a difference in the parts. Jon -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] pico servo driver
On Thu, 21 Oct 2010 19:57:57 -0500 Jon Elson wrote: HI John: How much is the pico servo driver boards? Do they require a brakeout board? Thanks; Bill -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
Looks really bad! On Sat, Oct 23, 2010 at 5:38 PM, RogerN wrote: > At work we use Siemens Mircobox 427 PC's to control machines. They have a > heat sink on the back and don't have a fan. Some of them are using compact > flash for a hard drive and we use EWFMGR Enhanced Write Filter Manager to > protect the CF cards because of the way windows is always writing to the > hard drive, damaging CF cards in a few months. If you use EWF on the C: > drive and store data to the D: drive it will prevent you from losing data > changes on every reboot. I'm not sure if Linux has an equivalent to Windows > Enhanced Write Filter but perhaps. Also, since this is about the > reliability subject, I should mention that we had 10-12 Siemens MicroBox > failures within the last year and only 1 Allen Bradley PLC processor, and we > probably have 5 times as many AB PLC's as we do Siemens MicroBox PC's and > the Allen Bradley PLC's are several years older than the MicroBox PC's. In > other words, the Siemens MicroBox doesn't seem to qualify as an > Untra-reliable PC! > > Roger Neal > > - Original Message - > From: "Ian W. Wright" > To: "Enhanced Machine Controller (EMC)" > Sent: Saturday, October 23, 2010 4:51 PM > Subject: Re: [Emc-users] OT ultra-reliable, long life PC > > >> FWIW, I've had to replace the SSD in my son's quite >> expensive notebook twice in less than 15 months. I've seen a >> couple of articles saying how they have only a limited >> number of read/write cycles before they are lible to fail - >> I don't think I'd like to trust important data to one yet... >> >> Ian I have a SSD in my office computer for the fantastic speed. However it did fail after less than 6 months which is rather worrying. It was replaced under warranty but it doesn't bode well for long term life. >> >> >> -- >> Nokia and AT&T present the 2010 Calling All Innovators-North America >> contest >> Create new apps & games for the Nokia N8 for consumers in U.S. and Canada >> $10 million total in prizes - $4M cash, 500 devices, nearly $6M in >> marketing >> Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store >> http://p.sf.net/sfu/nokia-dev2dev >> ___ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > -- > Nokia and AT&T present the 2010 Calling All Innovators-North America contest > Create new apps & games for the Nokia N8 for consumers in U.S. and Canada > $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing > Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store > http://p.sf.net/sfu/nokia-dev2dev > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
At work we use Siemens Mircobox 427 PC's to control machines. They have a heat sink on the back and don't have a fan. Some of them are using compact flash for a hard drive and we use EWFMGR Enhanced Write Filter Manager to protect the CF cards because of the way windows is always writing to the hard drive, damaging CF cards in a few months. If you use EWF on the C: drive and store data to the D: drive it will prevent you from losing data changes on every reboot. I'm not sure if Linux has an equivalent to Windows Enhanced Write Filter but perhaps. Also, since this is about the reliability subject, I should mention that we had 10-12 Siemens MicroBox failures within the last year and only 1 Allen Bradley PLC processor, and we probably have 5 times as many AB PLC's as we do Siemens MicroBox PC's and the Allen Bradley PLC's are several years older than the MicroBox PC's. In other words, the Siemens MicroBox doesn't seem to qualify as an Untra-reliable PC! Roger Neal - Original Message - From: "Ian W. Wright" To: "Enhanced Machine Controller (EMC)" Sent: Saturday, October 23, 2010 4:51 PM Subject: Re: [Emc-users] OT ultra-reliable, long life PC > FWIW, I've had to replace the SSD in my son's quite > expensive notebook twice in less than 15 months. I've seen a > couple of articles saying how they have only a limited > number of read/write cycles before they are lible to fail - > I don't think I'd like to trust important data to one yet... > > Ian >>> I have a SSD in my office computer for the fantastic speed. However it >>> did fail after less than 6 months which is rather worrying. It was >>> replaced under warranty but it doesn't bode well for long term life. > > > -- > Nokia and AT&T present the 2010 Calling All Innovators-North America > contest > Create new apps & games for the Nokia N8 for consumers in U.S. and Canada > $10 million total in prizes - $4M cash, 500 devices, nearly $6M in > marketing > Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store > http://p.sf.net/sfu/nokia-dev2dev > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 7i43 or 5i20
On 23 October 2010 23:29, James Reed wrote: > Yes, but you can have the 7i43 or 5i20 perform the PID calculations. Are you sure? -- atp -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 7i43 or 5i20
Yes, but you can have the 7i43 or 5i20 perform the PID calculations. This offloads the control update rates to the FPGA, and lessens the burden on the parallel or PCI port. I am in the process of using a 7i43 for a Bridgeport BTC-1 retrofit, and haven't had any problems with update rates. > From: andyi_w...@btinternet.com > To: emc-users@lists.sourceforge.net > Date: Sat, 23 Oct 2010 22:42:33 +0100 > Subject: Re: [Emc-users] 7i43 or 5i20 > > Ok, so if I have this right: > Servo thread periods of 1000us - 2000us are fine for 3/4 axis mill cutting > steel / aluminium with rapids of say 120ipm. Benefit of hardware stepgens > is improved resolution of accelerating / decelerating pulse trains - makes > better use of stepper motors are high rpm. > > 7i43 on a parallel port should cope with 1 to 2kHz servo thread BUT there is > an issue with setting the EPP parallel port mode on the D510MO when running > Ubuntu 10.04. > > The other option is 5i20 or 5i23 PCI cards which don't have the EPP issue > but are >x2 more expensive than the 7i43. > > Life is never easy :( > Regards > Andy > > -- > From: "Jon Elson" > Sent: Saturday, October 23, 2010 7:14 PM > To: "Enhanced Machine Controller (EMC)" > Subject: Re: [Emc-users] 7i43 or 5i20 > > > Andy Pugh wrote: > >> Possibly. I have read somewhere that a sane (200uS) servo-thread > >> _execution_ period is only enough time to shift 50 bytes through a > >> parallel port. That is potentially limiting, but has not been a > >> problem I have noticed with my 4-axis machine. The software stepgens > >> running in the base thread and twiddling pins individually are > >> effectively shifting one word per thread cycle. > >> > > At first I was going to take major exception to your numbers, but if > > your servo loop has > > to read position, compute PID, etc. and then write velocity out to the > > device, > > actually, you may be just about right! Using a PCI parallel port in EPP > > mode, > > 200 us should allow up to 250 bytes or so to be transferred, but that > > would take up > > the entire SERVO_PERIOD. You have to leave some slack for timing > > variation, > > and also for computation. So, the 50-byte figure might be quite close. > > > > For my USC board, for instance, there are 4 axes, with 3 bytes of > > position and > > 3 bytes of velocity for each. Plus a little digital I/O. So, it reads > > 14 bytes and write > > 13, plus setup and control overhead. Total of about 35 I/O operations > > per servo > > cycle. You could easily run a 10 KHz servo cycle with 4 axes, or 5 KHz > > with 8 > > axes on a modern CPU and PCI parport. > > > > Jon > > > > -- > > Nokia and AT&T present the 2010 Calling All Innovators-North America > > contest > > Create new apps & games for the Nokia N8 for consumers in U.S. and Canada > > $10 million total in prizes - $4M cash, 500 devices, nearly $6M in > > marketing > > Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store > > http://p.sf.net/sfu/nokia-dev2dev > > ___ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > -- > Nokia and AT&T present the 2010 Calling All Innovators-North America contest > Create new apps & games for the Nokia N8 for consumers in U.S. and Canada > $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing > Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store > http://p.sf.net/sfu/nokia-dev2dev > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 7i43 or 5i20
On 23 October 2010 22:42, Andy Ibbotson wrote: > 7i43 on a parallel port should cope with 1 to 2kHz servo thread BUT there is > an issue with setting the EPP parallel port mode on the D510MO when running > Ubuntu 10.04. I think that the Hostmot2 driver tends to say "EPP not supported, carrying on regardless". Even if it doesn't, we can make yours do that. -- atp -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
What was the brand of ssd? On Oct 23, 2010 4:54 PM, "Ian W. Wright" wrote: FWIW, I've had to replace the SSD in my son's quite expensive notebook twice in less than 15 months. I've seen a couple of articles saying how they have only a limited number of read/write cycles before they are lible to fail - I don't think I'd like to trust important data to one yet... Ian >> I have a SSD in my office computer for the fantastic speed. However it >> did fail after less tha... -- Nokia and AT&T presen... -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
FWIW, I've had to replace the SSD in my son's quite expensive notebook twice in less than 15 months. I've seen a couple of articles saying how they have only a limited number of read/write cycles before they are lible to fail - I don't think I'd like to trust important data to one yet... Ian >> I have a SSD in my office computer for the fantastic speed. However it >> did fail after less than 6 months which is rather worrying. It was >> replaced under warranty but it doesn't bode well for long term life. -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 7i43 or 5i20
Ok, so if I have this right: Servo thread periods of 1000us - 2000us are fine for 3/4 axis mill cutting steel / aluminium with rapids of say 120ipm. Benefit of hardware stepgens is improved resolution of accelerating / decelerating pulse trains - makes better use of stepper motors are high rpm. 7i43 on a parallel port should cope with 1 to 2kHz servo thread BUT there is an issue with setting the EPP parallel port mode on the D510MO when running Ubuntu 10.04. The other option is 5i20 or 5i23 PCI cards which don't have the EPP issue but are >x2 more expensive than the 7i43. Life is never easy :( Regards Andy -- From: "Jon Elson" Sent: Saturday, October 23, 2010 7:14 PM To: "Enhanced Machine Controller (EMC)" Subject: Re: [Emc-users] 7i43 or 5i20 > Andy Pugh wrote: >> Possibly. I have read somewhere that a sane (200uS) servo-thread >> _execution_ period is only enough time to shift 50 bytes through a >> parallel port. That is potentially limiting, but has not been a >> problem I have noticed with my 4-axis machine. The software stepgens >> running in the base thread and twiddling pins individually are >> effectively shifting one word per thread cycle. >> > At first I was going to take major exception to your numbers, but if > your servo loop has > to read position, compute PID, etc. and then write velocity out to the > device, > actually, you may be just about right! Using a PCI parallel port in EPP > mode, > 200 us should allow up to 250 bytes or so to be transferred, but that > would take up > the entire SERVO_PERIOD. You have to leave some slack for timing > variation, > and also for computation. So, the 50-byte figure might be quite close. > > For my USC board, for instance, there are 4 axes, with 3 bytes of > position and > 3 bytes of velocity for each. Plus a little digital I/O. So, it reads > 14 bytes and write > 13, plus setup and control overhead. Total of about 35 I/O operations > per servo > cycle. You could easily run a 10 KHz servo cycle with 4 axes, or 5 KHz > with 8 > axes on a modern CPU and PCI parport. > > Jon > > -- > Nokia and AT&T present the 2010 Calling All Innovators-North America > contest > Create new apps & games for the Nokia N8 for consumers in U.S. and Canada > $10 million total in prizes - $4M cash, 500 devices, nearly $6M in > marketing > Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store > http://p.sf.net/sfu/nokia-dev2dev > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 7i43 or 5i20
Thanks Andy and Jon, I'm beginning to understand. Regards Andy -- From: "Jon Elson" Sent: Saturday, October 23, 2010 7:14 PM To: "Enhanced Machine Controller (EMC)" Subject: Re: [Emc-users] 7i43 or 5i20 > Andy Pugh wrote: >> Possibly. I have read somewhere that a sane (200uS) servo-thread >> _execution_ period is only enough time to shift 50 bytes through a >> parallel port. That is potentially limiting, but has not been a >> problem I have noticed with my 4-axis machine. The software stepgens >> running in the base thread and twiddling pins individually are >> effectively shifting one word per thread cycle. >> > At first I was going to take major exception to your numbers, but if > your servo loop has > to read position, compute PID, etc. and then write velocity out to the > device, > actually, you may be just about right! Using a PCI parallel port in EPP > mode, > 200 us should allow up to 250 bytes or so to be transferred, but that > would take up > the entire SERVO_PERIOD. You have to leave some slack for timing > variation, > and also for computation. So, the 50-byte figure might be quite close. > > For my USC board, for instance, there are 4 axes, with 3 bytes of > position and > 3 bytes of velocity for each. Plus a little digital I/O. So, it reads > 14 bytes and write > 13, plus setup and control overhead. Total of about 35 I/O operations > per servo > cycle. You could easily run a 10 KHz servo cycle with 4 axes, or 5 KHz > with 8 > axes on a modern CPU and PCI parport. > > Jon > > -- > Nokia and AT&T present the 2010 Calling All Innovators-North America > contest > Create new apps & games for the Nokia N8 for consumers in U.S. and Canada > $10 million total in prizes - $4M cash, 500 devices, nearly $6M in > marketing > Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store > http://p.sf.net/sfu/nokia-dev2dev > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] compiling emc2_2.4.4 on cblfs
On Saturday 23 October 2010 19:12:14 bv wrote: > > Part of one of the instructions at > > http://neo-technical.wikispaces.com/emc2-ubuntu > > is > > sed -i 's/pci_find_device/pci_get_device/g' *.c > > thanks the sed allowed progress. > > However I had also passed the following line to configure:- > --enable-build-documentation=html > > # AND make now ends like so:- > > LD [M] $SOURCES/emc2-2.4.4/src/xor2.ko > make[1]: Leaving directory `/usr/src/linux-2.6nv' > WARNING: "asin" [$SOURCES/emc2-2.4.4/src/genserkins.ko] undefined! > WARNING: "cbrt" [$SOURCES/emc2-2.4.4/src/genserkins.ko] undefined! > cp *.ko ../rtlib/ > python ../docs/src/lyxtree.py --imagedir=../docs/html -o > objects/code_Code_Notes.xml ../docs/src/code/Code_Notes.lyx > ../docs/src/lyxtree.py:20: DeprecationWarning: the sha module is > deprecated; use the hashlib module instead > import sha > Traceback (most recent call last): > File "../docs/src/lyxtree.py", line 771, in > doc, outfile = parse(sys.argv[1:]) > File "../docs/src/lyxtree.py", line 726, in parse > infile = getlyx(infile) > File "../docs/src/lyxtree.py", line 47, in getlyx > stdin=infile, stdout=subprocess.PIPE) > File "/usr/lib/python2.6/subprocess.py", line 621, in __init__ > errread, errwrite) > File "/usr/lib/python2.6/subprocess.py", line 1126, in _execute_child > raise child_exception > OSError: [Errno 2] No such file or directory > make: *** [objects/code_Code_Notes.xml] Error 1 > make: Leaving directory `$SOURCES/emc2-2.4.4/src > # > I found a fix. Passing --enable-build-documentation=pdf works thanks -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 7i43 or 5i20
Andy Pugh wrote: > Possibly. I have read somewhere that a sane (200uS) servo-thread > _execution_ period is only enough time to shift 50 bytes through a > parallel port. That is potentially limiting, but has not been a > problem I have noticed with my 4-axis machine. The software stepgens > running in the base thread and twiddling pins individually are > effectively shifting one word per thread cycle. > At first I was going to take major exception to your numbers, but if your servo loop has to read position, compute PID, etc. and then write velocity out to the device, actually, you may be just about right! Using a PCI parallel port in EPP mode, 200 us should allow up to 250 bytes or so to be transferred, but that would take up the entire SERVO_PERIOD. You have to leave some slack for timing variation, and also for computation. So, the 50-byte figure might be quite close. For my USC board, for instance, there are 4 axes, with 3 bytes of position and 3 bytes of velocity for each. Plus a little digital I/O. So, it reads 14 bytes and write 13, plus setup and control overhead. Total of about 35 I/O operations per servo cycle. You could easily run a 10 KHz servo cycle with 4 axes, or 5 KHz with 8 axes on a modern CPU and PCI parport. Jon -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] compiling emc2_2.4.4 on cblfs
On Saturday 23 October 2010 18:23:12 Andy Pugh wrote: > On 23 October 2010 17:57, bv wrote: > > $SOURCES/emc2-2.4.4/src/hal/drivers/hal_m5i20.c:288: error: implicit > > declaration of function 'pci_find_device' > > Part of one of the instructions at > http://neo-technical.wikispaces.com/emc2-ubuntu > is > sed -i 's/pci_find_device/pci_get_device/g' *.c thanks the sed allowed progress. However I had also passed the following line to configure:- --enable-build-documentation=html # AND make now ends like so:- LD [M] $SOURCES/emc2-2.4.4/src/xor2.ko make[1]: Leaving directory `/usr/src/linux-2.6nv' WARNING: "asin" [$SOURCES/emc2-2.4.4/src/genserkins.ko] undefined! WARNING: "cbrt" [$SOURCES/emc2-2.4.4/src/genserkins.ko] undefined! cp *.ko ../rtlib/ python ../docs/src/lyxtree.py --imagedir=../docs/html -o objects/code_Code_Notes.xml ../docs/src/code/Code_Notes.lyx ../docs/src/lyxtree.py:20: DeprecationWarning: the sha module is deprecated; use the hashlib module instead import sha Traceback (most recent call last): File "../docs/src/lyxtree.py", line 771, in doc, outfile = parse(sys.argv[1:]) File "../docs/src/lyxtree.py", line 726, in parse infile = getlyx(infile) File "../docs/src/lyxtree.py", line 47, in getlyx stdin=infile, stdout=subprocess.PIPE) File "/usr/lib/python2.6/subprocess.py", line 621, in __init__ errread, errwrite) File "/usr/lib/python2.6/subprocess.py", line 1126, in _execute_child raise child_exception OSError: [Errno 2] No such file or directory make: *** [objects/code_Code_Notes.xml] Error 1 make: Leaving directory `$SOURCES/emc2-2.4.4/src # I did not see any fixes for this in the url above. Advice would be apreciated sincere;y bv -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
Hi Jon, I used hdparm to tell the drive to spin down after 5 minutes of inactivity. The backup is simply rsync running as a cron job. The SSD I used in my office machine was a Kingston. I have to say I was impressed by their customer service. I emailed them on Monday and got an RMA number within an hour. I sent the drive back and had the replacement by Thursday. They offer a 3 year warranty so they must expect them to be pretty reliable. To be honest, even if the SSD is as unreliable as a hard drive, I would still use it. The computer feels so much more responsive with an SSD. Les > Do you have a script that spins up the backup drive, runs the backup and > then spins it down? If so, I'd like to see how you did that! If you > don't spin > down the backup drive, it may wear out at the same time as the main one. > > I have kind of planned on moving to an SSD with daily hard-drive backup, > but haven't worked out the exact mechanics of how to do it. I just got a > 250 gb SATA drive for the backup, but haven't figured out what SSD to get, > they are still a bit expensive. > > If this works out, I might do the same on my server, too. >> I have a SSD in my office computer for the fantastic speed. However it >> did fail after less than 6 months which is rather worrying. It was >> replaced under warranty but it doesn't bode well for long term life. >> > I don't have a huge turnover in files on my desktop system, but would be > kind > of afraid to do this without daily backup. I just was horrified to > discover that if > you recall an old backup "project" in K3B, it doesn't add any files that > were created > since the project was saved. I "ASSUMED" that it recalled only the > directories, > and backed up all files NOW in those directories! YIKES, glad I > discovered this > "feature" before I needed to recover files! > > Jon > -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 7i43 or 5i20
Andy Ibbotson wrote: > Thanks Andy. I thought that EMC2 required EPP mode on the parallel port, I > think people are using the board to drive software stepgen. EPP is ONLY needed for Pico Systems and Mesa products that use EPP as a communications path to a controller board. It definitely is NOT required for software step pulse generation and similar things. > I have read the > thread re. the EPP issues and it seems that the fix for the EPP modes is > quite simple? > Going back to the PCI based cards, does the extra speed of the interface > mean that the servo thread can be run faster giving increased update rates > of velocity? I'm trying to assess the benefits of moving from software > stengen to hardware stepgens. > PCI cards definitely are faster than the motherboard parports connected through the ISA-bridge, as they STILL are on a number of motherboards. Some measurements I've made were that a byte transfer on an ISA port ran 800-1000ns, but on a PCI port was in the range of 500-650 ns. I haven't done detailed measurements lately, but on a 600 MHz Pentium III, the entire servo loop for 4 axes, including reading in position, computing the PID and writing out new velocities, took about 60 us with a PCI port, and about 120 us with the ISA. These are very rough numbers from foggy memory. Given a more modern CPU, I think you could probably run a 10 KHz servo loop without problems, but I'm not sure what sort of machine would actually need such a fast update rate. Maybe if you were contouring at 600 IPM this could be a real concern. All of this is relatively beside the point when you talk about software step generation. My Universal Stepper Controller (USC) can generate step pulse rates over 300,000 per second per axis, with step timing granularity of 100 ns. Compare this to the best software step granularity of maybe 16 us, and you see hardware can do about 160 times better. Also, the USC board can take in encoder signals to close the loop on any step/dir drive, whether the actual motor is a stepper or servo. You can even do this on individual axes, so some can be open-loop steppers, others can be closed-loop. Jon -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
On Sat, Oct 23, 2010 at 12:43 PM, Jon Elson wrote: > Leslie Newell wrote: >> The OS boots off a CF card but main storage is 2x 300GB >> mechanical hard drives. Every day it backs up one drive to the other. It >> has been running 24/7 for many years. >> >> > Do you have a script that spins up the backup drive, runs the backup and > then spins it down? If so, I'd like to see how you did that! If you > don't spin > down the backup drive, it may wear out at the same time as the main one. man hdparm > I have kind of planned on moving to an SSD with daily hard-drive backup, > but haven't worked out the exact mechanics of how to do it. I just got a > 250 gb SATA drive for the backup, but haven't figured out what SSD to get, > they are still a bit expensive. All I know is that Intel SSDs are very honestly made. > If this works out, I might do the same on my server, too. >> >> I have a SSD in my office computer for the fantastic speed. However it >> did fail after less than 6 months which is rather worrying. It was >> replaced under warranty but it doesn't bode well for long term life. >> > I don't have a huge turnover in files on my desktop system, but would be > kind > of afraid to do this without daily backup. I just was horrified to > discover that if > you recall an old backup "project" in K3B, it doesn't add any files that > were created > since the project was saved. I "ASSUMED" that it recalled only the > directories, > and backed up all files NOW in those directories! YIKES, glad I > discovered this > "feature" before I needed to recover files! I use rdiff-backup, it is great and is incremental. i > Jon > > -- > Nokia and AT&T present the 2010 Calling All Innovators-North America contest > Create new apps & games for the Nokia N8 for consumers in U.S. and Canada > $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing > Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store > http://p.sf.net/sfu/nokia-dev2dev > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
On Sat, Oct 23, 2010 at 12:35 PM, Jon Elson wrote: > Igor Chudov wrote: >> Jon, thanks. What I like about atoms and ssds, is that they are cool >> and thus are unlikely to suffer from temperature stress. There is also >> no dependency on rotating fans. Meaning almost no dust clogging the >> PC, no bearing failure etc. >> >> Additionally for SSDs, there are no moving platters. I would use an >> Intel Mainstream MLC SSD, which I already use in a lot of places >> (algebra.com database partition, Bridgeport mill, swap on my desktop >> and MySQL databases too, and at work). >> > I tend to be VERY conservative with important stuff like disk drives, > and never go > for the latest generation of drives, but buy the later models of a > generation from > well-known manufacturers. This still doesn't avoid problems, but it > improves your > odds. If you have good long-term results with the Mainstream SSD, then that > is good info to have. These are the real thing. The only thing to wear them out is data writes. Because they have wear leveling, it takes a lot of writing to exhaust the update ability of flash cells. A lot, here, means more than some http logs. Think about how much data do you need to write to, say, referesh the cells of the entire disk 100 times. That would be a lot. This is a somewhat big topic due to write amplification, but generally it is far more than a typical server would ever need to write. > With the ext3 fs, especially, you don't have to worry much about CPU > crashes messing > up the fs. So, the rest of the system is expendable, although you want > it to just work and > not have to mess with it. But, the contents of the disk represent a > fair bit of work, > so you don't want to lose that. yep >> Too many writes is not an issue for the application that I have in >> mind (nameserver, CVS, DHCP). Actually it is difficult to come up with >> any realistic application that would write so much that it would >> overwhelm a disk with wear leveling. >> > Depending on how much (or little) logging you have, it may be fine. My > server > actually logs a LOT of crap that I rarely look at. It can be handy for > unwinding > break-in attempts and the like, however. It is probably not a lot in terms of the ability of a SSD to absorb writes. i -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
Mark Wendt (Contractor) wrote: > > You mentioned the Dells before, so when my shop box decided > to take a crap, I hit the local computer warehouse here in the DC > Metro area. They didn't have any Optiplex's, but I did manage to get > a Dell Dimension 8400 (? - looking at the invoice - I'll check the > model # when I get a chance to get out the the shop) with a P4 3.GHz > CPU, 1 GB RAM, 40 GB HD and CD-RW. Jitter on this machine was in the > 6000's with the hyper-threading turned off. > Dimension is their home line, I think. I really don't know what the difference is between Optiplex and Dimension, but I think there may be a different grade of parts that went into them. If you run this computer 24/7, that may be significant. If you run it only when you are using the machine tool or whatever, then I suspect it will make much less difference. The jitter numbers sound real good! Jon -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
Leslie Newell wrote: > The OS boots off a CF card but main storage is 2x 300GB > mechanical hard drives. Every day it backs up one drive to the other. It > has been running 24/7 for many years. > > Do you have a script that spins up the backup drive, runs the backup and then spins it down? If so, I'd like to see how you did that! If you don't spin down the backup drive, it may wear out at the same time as the main one. I have kind of planned on moving to an SSD with daily hard-drive backup, but haven't worked out the exact mechanics of how to do it. I just got a 250 gb SATA drive for the backup, but haven't figured out what SSD to get, they are still a bit expensive. If this works out, I might do the same on my server, too. > > I have a SSD in my office computer for the fantastic speed. However it > did fail after less than 6 months which is rather worrying. It was > replaced under warranty but it doesn't bode well for long term life. > I don't have a huge turnover in files on my desktop system, but would be kind of afraid to do this without daily backup. I just was horrified to discover that if you recall an old backup "project" in K3B, it doesn't add any files that were created since the project was saved. I "ASSUMED" that it recalled only the directories, and backed up all files NOW in those directories! YIKES, glad I discovered this "feature" before I needed to recover files! Jon -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
Igor Chudov wrote: > Jon, thanks. What I like about atoms and ssds, is that they are cool > and thus are unlikely to suffer from temperature stress. There is also > no dependency on rotating fans. Meaning almost no dust clogging the > PC, no bearing failure etc. > > Additionally for SSDs, there are no moving platters. I would use an > Intel Mainstream MLC SSD, which I already use in a lot of places > (algebra.com database partition, Bridgeport mill, swap on my desktop > and MySQL databases too, and at work). > I tend to be VERY conservative with important stuff like disk drives, and never go for the latest generation of drives, but buy the later models of a generation from well-known manufacturers. This still doesn't avoid problems, but it improves your odds. If you have good long-term results with the Mainstream SSD, then that is good info to have. With the ext3 fs, especially, you don't have to worry much about CPU crashes messing up the fs. So, the rest of the system is expendable, although you want it to just work and not have to mess with it. But, the contents of the disk represent a fair bit of work, so you don't want to lose that. > Too many writes is not an issue for the application that I have in > mind (nameserver, CVS, DHCP). Actually it is difficult to come up with > any realistic application that would write so much that it would > overwhelm a disk with wear leveling. > Depending on how much (or little) logging you have, it may be fine. My server actually logs a LOT of crap that I rarely look at. It can be handy for unwinding break-in attempts and the like, however. Jon -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
Those old PCs need to be refitted with new hard drives every time. I would expect this atom box to use 20-25 watts of power also. Reports of their reliability are overblown. I used a Dell Dimension 4100 on my Bridgeport Interact and it would occasionally fail to boot, for example. I still have this Dimension. i On Sat, Oct 23, 2010 at 12:14 PM, Kirk Wallace wrote: > On Sat, 2010-10-23 at 11:49 -0500, Igor Chudov wrote: >> I kept looking and found this: >> >> http://www.newegg.com/Product/Product.aspx?Item=N82E16856101096 >> >> This is a Atom based fanless PC with an external laptop style brick >> power supply (meaning it is easily replaceable) and a DVD drive. I >> would replace or supplant the 320 GB Sata drive with an SSD. If I keep >> the sata drive, it would be used to hold various backups. >> >> Because of its intended use (no graphics, no movie viewing, just >> modest data serving) it should not consume too much power. >> >> i > > Just exploring another angle. Lets say you get a $50 Dell GX110 and use > it as is for five years or how ever long it lasts and it uses 150 watts > of power. Then compare it to this $300 PC at 80 Watts (guessing here). > That leaves $250 to pay the difference in in power consumption. And > saves all the new energy that is needed to make, transport (from China) > and recycle (back to China) a new PC. I haven't thought about it much > more than this, so I really don't know how this would turn out. > -- > Kirk Wallace > http://www.wallacecompany.com/machine_shop/ > http://www.wallacecompany.com/E45/index.html > California, USA > > > -- > Nokia and AT&T present the 2010 Calling All Innovators-North America contest > Create new apps & games for the Nokia N8 for consumers in U.S. and Canada > $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing > Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store > http://p.sf.net/sfu/nokia-dev2dev > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] compiling emc2_2.4.4 on cblfs
On 23 October 2010 17:57, bv wrote: > $SOURCES/emc2-2.4.4/src/hal/drivers/hal_m5i20.c:288: error: implicit > declaration of function 'pci_find_device' Part of one of the instructions at http://neo-technical.wikispaces.com/emc2-ubuntu is sed -i 's/pci_find_device/pci_get_device/g' *.c -- atp -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
On Sat, 2010-10-23 at 11:49 -0500, Igor Chudov wrote: > I kept looking and found this: > > http://www.newegg.com/Product/Product.aspx?Item=N82E16856101096 > > This is a Atom based fanless PC with an external laptop style brick > power supply (meaning it is easily replaceable) and a DVD drive. I > would replace or supplant the 320 GB Sata drive with an SSD. If I keep > the sata drive, it would be used to hold various backups. > > Because of its intended use (no graphics, no movie viewing, just > modest data serving) it should not consume too much power. > > i Just exploring another angle. Lets say you get a $50 Dell GX110 and use it as is for five years or how ever long it lasts and it uses 150 watts of power. Then compare it to this $300 PC at 80 Watts (guessing here). That leaves $250 to pay the difference in in power consumption. And saves all the new energy that is needed to make, transport (from China) and recycle (back to China) a new PC. I haven't thought about it much more than this, so I really don't know how this would turn out. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] compiling emc2_2.4.4 on cblfs
On Saturday 23 October 2010 13:27:37 bv wrote: > Greetings, > > I am sttempting to compile emc2_2.4.4 on a machine with these:- > a) cpu: amd64 -2 cores b) o/s cblfs linux 64-bit, kernel-2.6.32, (labelled as linux-2.6nv) rtai-3.8.1, xorg-7.5 kde-4.4.5, tk8.5.8, tcl8.5.8 make ends like so:- make[1]: Leaving directory `/usr/src/linux-2.6nv' $SOURCES/emc2-2.4.4/src/emc/kinematics/genserkins.c: In function 'genser_kin_jac_inv': $SOURCES/emc2-2.4.4/src/emc/kinematics/genserkins.c:268: warning: the frame size of 2112 bytes is larger than 2048 bytes $SOURCES/emc2-2.4.4/src/emc/kinematics/genserkins.c: In function 'kinematicsInverse': $SOURCES/emc2-2.4.4/src/emc/kinematics/genserkins.c:523: warning: the frame size of 2512 bytes is larger than 2048 bytes $SOURCES/emc2-2.4.4/src/hal/drivers/hal_m5i20.c: In function 'init_module': $SOURCES/emc2-2.4.4/src/hal/drivers/hal_m5i20.c:288: error: implicit declaration of function 'pci_find_device' $SOURCES/emc2-2.4.4/src/hal/drivers/hal_m5i20.c:288: warning: assignment makes pointer from integer without a cast make[2]: *** [$SOURCES/emc2-2.4.4/src/hal/drivers/hal_m5i20.o] Error 1 make[1]: *** [_module_$SOURCES/emc2-2.4.4/src] Error 2 make: *** [modules] Error 2 make: Leaving directory `$SOURCES/emc2-2.4.4/src' help would be appreciated sincerely bv -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
I kept looking and found this: http://www.newegg.com/Product/Product.aspx?Item=N82E16856101096 This is a Atom based fanless PC with an external laptop style brick power supply (meaning it is easily replaceable) and a DVD drive. I would replace or supplant the 320 GB Sata drive with an SSD. If I keep the sata drive, it would be used to hold various backups. Because of its intended use (no graphics, no movie viewing, just modest data serving) it should not consume too much power. i -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] compiling emc2_2.4.4 on cblfs
On Saturday 23 October 2010 13:27:37 bv wrote: > Greetings, > > I am sttempting to compile emc2_2.4.4 on a machine with these:- > > a) cpu: amd64 -2 cores > b) o/s cblfs linux 64-bit, kernel-2.6.32, rtai-3.8.1, xorg-7.5 kde-4.4.5, > TK-2.5.8, tcl8.5.8 > > > > running makes ends as follows:- > > Compiling emc/usr_intf/emcsh.cc > In file included from emc/usr_intf/emcsh.cc:23: > /usr/include/tk.h:78:23: error: X11/Xlib.h: No such file or directory > > > > I have tried the following as workrounds > --made a compatibility link of /usr/X11/include to /usr/include/X11 > --tried emc2_2.4.3 > > but the problem does not go away. > ln -s /usr/X11/include/X11 /usr/include/X11 seems to do the fix thanks -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 7i43 or 5i20
On 23 October 2010 14:37, Andy Ibbotson wrote: > > Andy > On your D510MO board have you tied the rt threads to one core? If so how did > you do this? Currently I am running an out-of-the-box 10.04 liveCD installation. I think that includes the islocpus=1 boot parameter in grub, but I am not sure. (but that is how it is done) -- atp -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 7i43 or 5i20
On 23 October 2010 13:58, Andy Ibbotson wrote: > > Thanks Andy. I thought that EMC2 required EPP mode on the parallel port AFAIK only for devices that use it for communications, not for applications which simply twiddle the pins on and off as individual signals. I might be mistaken. > think people are using the board to drive software stepgen. Yes, it has a nice low latency which suits that. > Going back to the PCI based cards, does the extra speed of the interface > mean that the servo thread can be run faster giving increased update rates > of velocity? Possibly. I have read somewhere that a sane (200uS) servo-thread _execution_ period is only enough time to shift 50 bytes through a parallel port. That is potentially limiting, but has not been a problem I have noticed with my 4-axis machine. The software stepgens running in the base thread and twiddling pins individually are effectively shifting one word per thread cycle. > I'm trying to assess the benefits of moving from software > stepgen to hardware stepgens. The main "win" is possibly fast encoder counting for spindle encoders. The advantage from a stepgen point of view is reduced granularity of step timings at higher rates. with a 20uS base thread you hit the point where your step time gets quantised into 80uS, 60uS, 40uS or 20us (with x8 microstepping and 200ppr that's 470rpm, 625rpm, 940rpm and 1880rpm) and you are effectively asking your motor to instantaneously accelerate between the speeds which is asking a lot of a motor which is probably already running out of torque a those speeds. Another huge advantage is that suddenly you have GPIO pins in abundance. -- atp -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Progress Report: Eagle Schematic to HAL code converter
On 10/23/2010 8:58 AM, emc-users-requ...@lists.sourceforge.net wrote: > From: Ed Nisley > Subject: [Emc-users] Progress Report: Eagle Schematic to HAL code > converter > To:emc-users@lists.sourceforge.net > Message-ID:<1287836715.3808.18.ca...@localhost.localdomain> > Content-Type: text/plain; charset=UTF-8 > > I tweaked Martin's original Eagle ULP a bit, added some library devices, > then built a schematic to connect my Logitech gamepad Joggy Thing as an > EMC2 pendant. > > The grisly details, links to background info, and current files are at: > > http://softsolder.com/2010/10/23/logitech-gamepad-as-emc2-pendant-eagle-schematics-for-the-joggy-thing/ > > Shorter link:http://wp.me/poZKh-1qh > Sweet! Not only is your work great but it's turned up the heat on me. I've gone a completely direction to try to document existing configurations using AT&T's dot program (now part of Graphviz) but I'm not far enough along to open the curtains for the viewing public. I was inspired by Doxygen and its use of GraphViz to document call-graphs. My goal is to produce an html "book" of link-graphs and possibly component parameter lists. Regards, Kent -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 7i43 or 5i20
Andy On your D510MO board have you tied the rt threads to one core? If so how did you do this? Regards Andy -- From: "Andy Pugh" Sent: Friday, October 22, 2010 9:38 AM To: "Enhanced Machine Controller (EMC)" Subject: Re: [Emc-users] 7i43 or 5i20 > On 22 October 2010 06:41, Andy Ibbotson wrote: > >> I am planning to move to MESA cards to drive my mill. AT present I'm >> trying to decide between the 7i43 (parallel) or the 5i20 (PCI). Platform >> will be Intel D510MO motherboard coupled with a 32Gb solid state disk. > > It is probable that the 7i43 won't work with the D510MO due the EPP > parallel port issue that has been reported here. (Though we can > probably patch the driver to bypass the problem). > The 5i20 has a bigger and not much more expensive brother, the 5i23, > which runs a wider variety of firmwares. (400k gate rather than 200k). > It is also physically smaller. > > The 7i43 might be easier to cable in some installations. > > -- > atp > > -- > Nokia and AT&T present the 2010 Calling All Innovators-North America > contest > Create new apps & games for the Nokia N8 for consumers in U.S. and Canada > $10 million total in prizes - $4M cash, 500 devices, nearly $6M in > marketing > Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store > http://p.sf.net/sfu/nokia-dev2dev > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
On Sat, Oct 23, 2010 at 1:55 AM, John Murphy wrote: > SSD's have a very finite life. I can't go into details on what makes/models > have longer lives, or ways that different companies extend SSD life, but any > enterprise application using SSD's for performance reasons almost considers > the SSD a consumable of the system. Even consumer products manufacturers > are specifying lifetimes for SSD's that would surprise most people... > (short!)... All I read (such as intel white paper), suggests that lifespan limitations of SSDs are all because of quantity of writes. For a use that I am considering, with limited writes, the lifespan would be tremendous. i > In most EMC type applications, they would probably last a very long time > (especially if swap, syslog, etc were minimized). Many SSD's have all kinds > of magic to refresh the data every so often, and need to be powered on to do > this. > > > On Fri, Oct 22, 2010 at 10:04 PM, Jon Elson wrote: > >> Igor Chudov wrote: >> > Jon, this is sad, but true. >> > >> > So, how would you approach building such a PC yourself? >> > >> Based ENTIRELY on my personal experience, I would go with a used Dell >> Optiplex. >> One good thing about the used thing is that they come "pre tested". >> Now, as for how much >> of their lifetime has been used up, I don't really know. But, I have >> sold a number of them, >> and have used them, and hauled some of them back and forth to a number >> of EMC meetings >> since 2001. I usually end up junking them due to performance rather >> than failure. In fact, >> I have never had a motherboard or PS failure on them. My EMC computers >> are not run 24/7, >> but my desktop and server are. I started with a 100 MHz Pentium Classic >> with 32 MB of memory >> and a 1 GB disk on my Bridgeport. >> I now have a 1 GHz Pentium III on the Bridgeport. This is mostly due to >> Linux bloat and to >> satisfy the demands of openGL for the Axis interface. >> >> One thing is to stay away from anything built in 2001 or 2002, that was >> when the capacitor debacle happened. >> We had one at work that fried the caps, I replaced them and it is still >> running. >> > How about an Atom base mobo, SSD and a PicoPSU? Maybe with a space >> > AC-DC adapter? >> > >> I am a little leery of these SSDs. They do NOT have proven >> reliability. We know what the reliability >> of a name-brand hard drive (Maxtor, Western Digital) is, but these flash >> memory drives haven't been out >> there that long. Some of the mainframe makers have RAM-based SSDs that >> are likely to be amazingly >> reliable. They are made from WELL-tested technology, but of course need >> battery backup and >> hard drive backup to survive. The flash-based stuff has known problems, >> although most of that is >> wear-out from too many writes. I have a SATA drive on my desktop now, >> with an IDE-SATA adaptor >> that plugs into the 40-pin connector on the motherboard. So, it needs 5 >> V power from a drive >> power connector. This is the weak link! The crappy Chinese AMP-ripoff >> connectors don't make good >> contact, and every six months the adaptor loses power. I've fiddled >> with the connector to try to make >> a better contact. Next time it happens, I really have to replace the >> connector with a REAL AMP connector. >> So, these are the kind of things that can bite you, and it is real hard >> to get away from these cheap Chinese >> connectors, cables, etc. when building your own system. >> >> The Atom CPU is Intel's latest technology, and therefore the smallest >> feature size. I have heard it >> mentioned in the same context with short lifetime, but don't actually >> know for sure. It IS, however, >> a 45 nm feature size chip. Long-term reliability is not proven, they >> just came out with the latest >> generation in Dec 2009. I'm sure Intel has stress-tested them to gauge >> long term reliability, and has >> enough experience doing that that they know what can be expected. I >> suspect there is something that >> they have published, if you really want to do the research. >> >> Jon >> >> >> -- >> Nokia and AT&T present the 2010 Calling All Innovators-North America >> contest >> Create new apps & games for the Nokia N8 for consumers in U.S. and Canada >> $10 million total in prizes - $4M cash, 500 devices, nearly $6M in >> marketing >> Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store >> http://p.sf.net/sfu/nokia-dev2dev >> ___ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > -- > Nokia and AT&T present the 2010 Calling All Innovators-North America contest > Create new apps & games for the Nokia N8 for consumers in U.S. and Canada > $10 million total in prizes - $4M cash, 500 d
Re: [Emc-users] 7i43 or 5i20
Thanks Andy. I thought that EMC2 required EPP mode on the parallel port, I think people are using the board to drive software stepgen. I have read the thread re. the EPP issues and it seems that the fix for the EPP modes is quite simple? Going back to the PCI based cards, does the extra speed of the interface mean that the servo thread can be run faster giving increased update rates of velocity? I'm trying to assess the benefits of moving from software stengen to hardware stepgens. Regards Andy -- From: "Andy Pugh" Sent: Friday, October 22, 2010 9:38 AM To: "Enhanced Machine Controller (EMC)" Subject: Re: [Emc-users] 7i43 or 5i20 > On 22 October 2010 06:41, Andy Ibbotson wrote: > >> I am planning to move to MESA cards to drive my mill. AT present I'm >> trying to decide between the 7i43 (parallel) or the 5i20 (PCI). Platform >> will be Intel D510MO motherboard coupled with a 32Gb solid state disk. > > It is probable that the 7i43 won't work with the D510MO due the EPP > parallel port issue that has been reported here. (Though we can > probably patch the driver to bypass the problem). > The 5i20 has a bigger and not much more expensive brother, the 5i23, > which runs a wider variety of firmwares. (400k gate rather than 200k). > It is also physically smaller. > > The 7i43 might be easier to cable in some installations. > > -- > atp > > -- > Nokia and AT&T present the 2010 Calling All Innovators-North America > contest > Create new apps & games for the Nokia N8 for consumers in U.S. and Canada > $10 million total in prizes - $4M cash, 500 devices, nearly $6M in > marketing > Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store > http://p.sf.net/sfu/nokia-dev2dev > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
Igor: Others have outlined reasons individual systems likely will fail. Were I to set the same goal, I'd look into redundant, also known as high-reliability or fault-tolerant, computing. With the "cloud" become the next big thing there are now expensive commercial products being pushed out the door by CISCO and others, but you can roll your own. I was going to say think RAID (which originally mean "redundant array of *inexpensive* disks") but a quick Google search just turned up a reference to RAID as "redundant arrays of independent 'data centers'" in an article about CISCO so I'm already a day late inventing my new marketing phrase. Regards, Kent -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] compiling emc2_2.4.4 on cblfs
Greetings, I am sttempting to compile emc2_2.4.4 on a machine with these:- a) cpu: amd64 -2 cores b) o/s cblfs linux 64-bit, kernel-2.6.32, rtai-3.8.1, xorg-7.5 kde-4.4.5, TK-2.5.8, tcl8.5.8 running makes ends as follows:- Compiling emc/usr_intf/emcsh.cc In file included from emc/usr_intf/emcsh.cc:23: /usr/include/tk.h:78:23: error: X11/Xlib.h: No such file or directory I have tried the following as workrounds --made a compatibility link of /usr/X11/include to /usr/include/X11 --tried emc2_2.4.3 but the problem does not go away. I have checked emc/usr_intf/emcsh.cc and I did not see andy refences tk.h or some such advice on what I am doing incorrectly would be appreciated. sincerely bv -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Progress Report: Eagle Schematic to HAL code converter
I tweaked Martin's original Eagle ULP a bit, added some library devices, then built a schematic to connect my Logitech gamepad Joggy Thing as an EMC2 pendant. The grisly details, links to background info, and current files are at: http://softsolder.com/2010/10/23/logitech-gamepad-as-emc2-pendant-eagle-schematics-for-the-joggy-thing/ Shorter link: http://wp.me/poZKh-1qh My intent is *not* to make a general do-it-all converter that can eat a schematic describing an entire machine and spit out a complete HAL file set, but to have something that can handle specific hardware gadgets that fit into an existing machine's HAL files. Basically, that's about all I understand how to do and have the machinery to test. It's reasonably usable as-is; I'll write up an overview of the pendant function for my Digital Machinist column. After some tweaking, adding more library devices, and cleaning up the internal doc, I'll figure out how to stuff the files back into the wiki. Suggestions, commentary, and funny stories are welcome... -- Ed -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
>On 23/10/10 05:04, Jon Elson wrote: > > Based ENTIRELY on my personal experience, I would go with a used Dell > > Optiplex. > > One good thing about the used thing is that they come "pre tested". > > Now, as for how much > > of their lifetime has been used up, I don't really know. But, I have > > sold a number of them, > > and have used them, and hauled some of them back and forth to a number > > of EMC meetings Jon, You mentioned the Dells before, so when my shop box decided to take a crap, I hit the local computer warehouse here in the DC Metro area. They didn't have any Optiplex's, but I did manage to get a Dell Dimension 8400 (? - looking at the invoice - I'll check the model # when I get a chance to get out the the shop) with a P4 3.GHz CPU, 1 GB RAM, 40 GB HD and CD-RW. Jitter on this machine was in the 6000's with the hyper-threading turned off. Mark -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Anyone configure the Gecko Drive - CNCRouterParts Kit?
On 23 October 2010 07:43, Shaffin Bhanji wrote: > Anyone happen to get this configured correctly to run a dual drive > y-axis system? It should work just the same as any other step/dir gantry system. > I have had good success using the Xylotex 3-axis system but sine I hear > that the Gecko Drive is a more superior controller I wanted to give it a > try - any comments? It sounds like an expensive experiment compared to adding another Xylotex drive to your existing system, assuming similar voltage and current specifications in the drives and torque/speed curves of the motors. Gecko drives may be superior to Xylotex, but the differences are likely to be minor, you still have a stepper system with the compromises that entails. -- atp -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
On 23 October 2010 04:00, Igor Chudov wrote: > How about an Atom base mobo, SSD and a PicoPSU? Maybe with a space > AC-DC adapter? If I was looking for extreme reliability I think I would avoid a PicoPSU, just because they cram so much power electronics into such a small space. -- atp -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
On 23 October 2010 05:04, Jon Elson wrote: > Based ENTIRELY on my personal experience, I would go with a used Dell > Optiplex. > One good thing about the used thing is that they come "pre tested". It is possibly even better than that. Assuming a "bathtub curve" of failure with time, all the ones prone to an early-life failure have already failed, so the second hand ones are already selected as the long life examples. -- atp -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT ultra-reliable, long life PC
I have to admit I like Dells as well. They seem to be pretty well designed. My network server has a fairly old motherboard with an AMD 500MHz processor. They don't run as hot as modern CPUs so it will run fanless with an oversized heatsink. I also have a 12V fan running on 5V just for peace of mind. The OS boots off a CF card but main storage is 2x 300GB mechanical hard drives. Every day it backs up one drive to the other. It has been running 24/7 for many years. The PSU is a 600W one with an oversized fan running on 5V instead of 12V. The computer probably only pulls around 100 - 150W so the PSU is hardly ticking over. I have a SSD in my office computer for the fantastic speed. However it did fail after less than 6 months which is rather worrying. It was replaced under warranty but it doesn't bode well for long term life. Les On 23/10/10 05:04, Jon Elson wrote: > Based ENTIRELY on my personal experience, I would go with a used Dell > Optiplex. > One good thing about the used thing is that they come "pre tested". > Now, as for how much > of their lifetime has been used up, I don't really know. But, I have > sold a number of them, > and have used them, and hauled some of them back and forth to a number > of EMC meetings > s -- Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
