Re: [Emc-users] Sheet metal bending, machine measurement/accuracy, new E-mail

ont door so expect it have been used quite much. Regards Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] large latency spike on gtk permission error

> Hi everyone > > I am a novice (read: clueless) in Linux internals, so bear with me if I > say something stupid. > On a fresh install of > http://www.linuxcnc.org/iso/linuxcnc-2.7.14-wheezy.iso, on an old > machine AMD Athlon 64. I've been using it for several years with > LinuxCNC, worked, b

Re: [Emc-users] Ethercat large messages, real time jitter --> delayed in other

think so but have not other good > idea. Anybody have any idea? > > Regards Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

[Emc-users] Ethercat large messages, real time jitter

good idea. Anybody have any idea? Regards Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] servo tuning questions yeha:) Ziegler Nichols

Rembered the name, that's enough to find it in seconds Ziegler Nichols method https://en.wikipedia.org/wiki/Ziegler%E2%80%93Nichols_method On Wed, 6 May 2020 16:41:04 +1200 andrew beck wrote: > I'll have a play thanks > > On Wed, May 6, 2020, 4:24 PM Nicklas Karlsson >

Re: [Emc-users] servo tuning questions yeha:)

uning stuff you can find would be appreciated. the problem is > I cannot use Halscope yet. until I have the servos tuned already I think > pretty close. But I might be wrong so if anyone has some experience here > I would love to hear it. > > regards > > Andrew > > On Wed,

Re: [Emc-users] Fluctuating RPM using CUI ATM 10 encoder

> Do you have a dual trace 'scope? Spin the spindle and look at the input > and output of the opto-isolator. See if there really is a lag. If you > have a new scope would you have it capture the screen and post it. I'm > really skeptical that those isolators are THAT bad. > > Here is the dat

Re: [Emc-users] Fluctuating RPM using CUI ATM 10 encoder

> I have a PMDC motor I’ve scavenged along with the MC-2100 motor control > from a treadmill rated for 1.5 hp @ 90 volts. I’ve been testing it with > LinuxCNC v2.7.15 in a mock-up environment I built for testing. I’m able to > control the spindle speed via PWM pulses to the controller (HD2 pin 4).

Re: [Emc-users] servo tuning questions yeha:)

n there is no model of the system and a similar problem today. Maybe I could point you in the right direction tonight. There are also some kind of auto tune function in Linuxcnc, what kind of update frequency do you get them using rs485? Regards Nicklas Karlsson ___

Re: [Emc-users] Machine accuracy

gh for drilling, I do not have to do measurements by hand anymore then drilling/threading for example hole for cooling fins. Searched manual and did not immediately found how to control movement in (X,Y) plane with good position accuracy while less is required in Z direction. Reg

[Emc-users] File storage, configuration and other, git via USB

storing seems to work great, though did not yet commit any changes back the other way. Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] cloning hard drive to new SSD

> Hi guys just getting back with a report of what I did to try clone my hard > drive. > > I tried to clone it in linuxcnc first as described and failed. then tried > clone zilla, then tried a few other programs to decrease the size. Do not think cloning is a good idea since it is an exact binar

Re: [Emc-users] Supplier for low-voltage (48V) servo motors?

> Hi John, hi Andy! > > On 23.03.20 17:13, John Dammeyer wrote: > > In, Vancouver there is > > http://www.dmm-tech.com > > > > Any particular reason why you want 48V? I use the Bergerda 220VAC units > > and although shipping is expensive the motor/drive components do end up > > costing less t

Re: [Emc-users] linuxcnc openlung ventilators --> do not come close to other people

Try to keep some distance to the people hanging in the meeting at my workplace. They sit in a relatively small room together for a long period of time so if one of them get sick he is likely to infect the others, they also tend to meet quite much other people. Think to keep some distance is a r

Re: [Emc-users] PMSM, STMBL Drive

> On Sat, 21 Mar 2020 at 18:32, Nicklas Karlsson > wrote: > > > > *rene-dev <https://github.com/rene-dev> * commented on May 7, 2018 > > > <https://github.com/rene-dev/stmbl/issues/91#issuecomment-386898077> > > > > > > IRAM256-1567

Re: [Emc-users] Question about index pulse on high resolution encoder --> laser distance sensor

olant is subtracted from distance of course. Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Question about index pulse on high resolution encoder

oder, use to be either sin/cos or quadrature. 5000 lines and 125000 pulses per turn must be from the 25-fold interpolation, I would expect interpolation to add much. 5000 lines per turn is in line with high resolution optical encoder from other manufacturer, have 2000P/R but think same ma

Re: [Emc-users] PMSM, STMBL Drive

lly good choice. Have prototype boards but nothing I dare to sell yet. Regards Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Question about index pulse on high resolution encoder

> On Saturday 21 March 2020 04:04:03 Nicklas Karlsson wrote: > > > > Hello guys, > > > > > > I'm testing a phisical encoder to simulate how the spindle will work > > > with the external offsets. So far so good but I need to clarify > > >

Re: [Emc-users] Question about index pulse on high resolution encoder

enhein encoders but I did not get them work and replaced them with 2000P/R encoders. Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] A hal question?

unter at updater or similar regular interval. Quite often I also trigger interrupt for control loop from same signal but sometimes signal trigger ADC and in such case interrupt from ADC then sampling is done might be a better option. Regards Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Open source CNC architecture --> good power plug

Yes these power plugs look good. Have some XLR they are cheap and good. > The best power plugs are those round "powerCON" plugs. But getting people > to use them will take time. Their good feature is that both genders have > only plastic parts exposed when unplugged and they can't be put in wron

Re: [Emc-users] Non-circular boring. Linuxcnc style.

Hex hole is rather useful for nuts. > video coming... :) one gcode program - chamfer, hex and hole all > poly-bored.. > h > > > > > On Sat, Mar 14, 2020, 6:47 PM Sam Sokolik wrote: > > > playing with being able to 'gear?' the x axis to the radius of the polygon. > > > > \ > > > > > > On T

Re: [Emc-users] No mails

Happens sometimes. Working on something but tired and going slowly forward. > Same here. But it seems to be working. > > El 6 mar. 2020 11:35, "Peter Blodow" escribió: > > > Gentlemen, > > I haven't received any mail from the list since March 2nd. Is there > > something wrong, or is there just

Re: [Emc-users] Emc-users Digest, Vol 166, Issue 122

Usually have automatic login. > I went to my shop the other day and it's been so long since I used my little > mill I cant remember my login. Any suggestions? I really dont want to have to > do a clean install.Chris > null > ___ > Emc-users mailing lis

Re: [Emc-users] Kinematics, headless CNC

Did not find list of kinematics module but. Do not think this kind of kinematics module exist, scara however come close and so could be a good starting point. > > No attached drawing. > > Trying to attach smaller version of drawing: > > > > If it doesn’t work, see here: > https://1drv.ms/u/s

Re: [Emc-users] Back to confusing puzzles. SSR failure mode short circuit!

> On Friday 21 February 2020 11:53:16 Nicklas Karlsson wrote: > > > > Greetings all; > > > > > > I have added a 40 amp SSR in the relay box with the two that are > > > sequencing the spindle's psu startup for a soft start, but its not > >

Re: [Emc-users] Kinematics, headless CNC

> I am working on a design for a small custom 2-axis machine with 2 joints. > Joint 0 is linear and oriented in the Y direction. Joint 1 is rotary and > mounted on Y. See attached drawing. No attached drawing. > My question is, would I be best off creating a new kinematics module for this > m

Re: [Emc-users] Back to confusing puzzles. SSR failure mode short circuit!

> Greetings all; > > I have added a 40 amp SSR in the relay box with the two that are > sequencing the spindle's psu startup for a soft start, but its not > intentionally connected to those 2 other than as a power src when its > enabled. Except this one is to be enabled by the E-stop.out sign

Re: [Emc-users] Open source CNC architecture - open source complexity OT, more off it

> > If it were true then Universities and schools wouldn't exist. After all > > everything taught in school is a "Google search away". > > There are a lot of extremely knowledgeable people out there with little > formal education. Had a cheap farmer as project leader at my workplace, that's the

Re: [Emc-users] install problems --> other hardware problem over heat, OT?

Had problem with HP server, it sometimes turned off, I could hear the fan speed increase then it worked so for some reason I decided to remove cooling fin, clearad ir, added new paste. Then it worked much better, could hear it on the fan and that was a real suprise. If it happaned once I guess i

Re: [Emc-users] looking for advice on best wiring practices and grounding on cnc mills

> I'll offer my recently purchased 6040 mill as prime evidence of paint > pretty much destroying my ability to ground anything. And to complicate > things even a Q&D TLO measure is prevented by ceramic bearings in the > spindle which are an insulator. ... Ceramic bearings might be there to pre

Re: [Emc-users] Using a laptop for testing purposes with linuxcnc

> ... With the > kernel my rpi4 is running, and abusing it badly, the worst case latency > is nominally 180 microseconds, plenty quick enough to keep the card > happy. The only time I've seen a stutter is when driving it with the > keyboard, there I get a random stop that resembles lifting my f

Re: [Emc-users] User Interface Addition

nication with machine? Download machine and/or tell machine to run a particular program? Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] User Interface Addition

Agree. A higher level system not necessarily real time, ordinary computer works. Tell robot to insert part using program, then iserted feed program to CNC tell it to run it, then done tell robot to remove part ... or tell operator. Have comment about server as this is according to my terminolo

Re: [Emc-users] Using a laptop for testing purposes with linuxcnc

> In general, notebook computers are optimized for size and battery life. > But Linux based CNC is running in Raspberry Pi and even smaller and lower > performance computers and dong fine.Performance is not needed. What is > needed is low latency real-time performance. For good real time perf

Re: [Emc-users] Using a laptop for testing purposes with linuxcnc

Checked once and concluded in general Laptops is a little bit more expensive and have a little bit less perfomance in some combination. Internal expansion ports are also limited. This should come as no suprise unless ordinary computer is similar in size. In general a smaller diameter 2.5 inch s

Re: [Emc-users] Question about HAL streamer

Use the opposite sampler and might be able to help you if needed. You got the file format? > Hello to all. > > I want to experiment with HAL streamer to send some data to a custom > component. The data will be read from a text file. > > I would like to know if there is more information other th

Re: [Emc-users] Whereare you getting your wire from?

Bought half a wagon load or so in different sizes a few years ago, then I do not need to run to store every time something should be connected. A good idea or not I still not know but I use some every now and then. On Mon, 28 Oct 2019 22:46:04 -0400 Dave Cole wrote: > Menards was selling some

[Emc-users] With stepper motors running

perfect yet, might also be because workpiece was not fastened/moved, probably no big issues but I will not spend more time with it right now since I do not have any direct use for it. Nicklas Karlsson ___ Emc-users mailing list Emc-users

Re: [Emc-users] Mesa PIN file description

Know about some variable or similar in *.hal file to enable printing of pins the Linuxcnc is started. > Hi all > > Does anyone know of a document or a description somewhere that explains > the contents, structure and possibilities of the Mesa PIN file? > > -- > > Regards / Groete > Marius D.

Re: [Emc-users] Control theory book by "Michael Blösch", state space fee-forward control

On Wed, 22 May 2019 09:47:21 +0100 andy pugh wrote: > On Wed, 22 May 2019 at 08:43, Nicklas Karlsson > wrote: > > > the conclusion it is very unlikely to come > > from anything else than a book about control theory. > > > Why not send him an email? > I think

Re: [Emc-users] Sampler, enable/disable to stop/start sampling

> On Tue, 6 Aug 2019 at 05:13, Nicklas Karlsson > wrote: > > > I found it useful to start capture os sample signal and quit then enough > > samples have been taken with the enable signal. Difference from today is > > sampling is stopped at negative flank of ena

[Emc-users] Sampler, enable/disable to stop/start sampling

uot; attribute then it is not supposed to change. With warnings in case variable is used unitialized it is not very important although I like to use the "const" attribute then variable is not supposed to change, I do not intend to make any patch for this but want to ask about yo

Re: [Emc-users] Linuxcnc-application

though TIG might be better since it is possible to indenpendently control speed of material added and power for heating if I got everything correct. Regards Nicklas Karlsson > Aram > > additive machining using MIG is very interesting > I've seen laser welding used to repair exp

Re: [Emc-users] Real time data write to file, unexpected real time delay --> sampler, halsampler

> There is a LOT more to this. > > 1. Dual or multi-core CPUs add some complexity because all the CPUs share a > common memory. What if all four CPUs try to run the "test and set" at the > same time? Also, you can no longer assume an interrupt handler has > exclusive use of memory. > 2. what if

Re: [Emc-users] Real time data write to file, unexpected real time delay --> sampler, halsampler

You are right, think the sampler, sampler_usr solved this properly. The simple Micro controllers I usually use is single core and no instruction reordering. Software is usally also low complexity, instruction for atomic write and check might however be available, operating systems are available

Re: [Emc-users] Real time data write to file, unexpected real time delay --> sampler, halsampler

ed by computer restart, have not looked why but would guess it happened because program aborted at wrong point the I did something wrong. Regards Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Real time data write to file, unexpected real time delay --> sampler, halsampler

On Fri, 26 Jul 2019 22:06:23 +1000 Erik Christiansen wrote: > On 22.07.19 18:48, Nicklas Karlsson wrote: > > Algorithm data is filled in a round buffer and sending/saving process > > should send/save the tail in not to small blocks. One counter for > > filling and one for

Re: [Emc-users] ... unexpected real time delay --> HAL oscilloscope, logging method, sampler

On Tue, 23 Jul 2019 05:38:13 -0400 Mark wrote: > On 7/23/19 05:27, Nicklas Karlsson wrote: > >> > > You are right why bother with DHCP then static IP adress work. I have done > > before but get the feeling someone removed the buttons in the newer user > > in

Re: [Emc-users] ... unexpected real time delay --> HAL oscilloscope, logging method

> > ... > > In this case iptables is used to get exclusive access to the Ethernet port. > > I am sure it have worked before but think it have been with fixed IP adress. > > > > > > Nicklas Karlsson > > Why bother when a static IP address works and has a

Re: [Emc-users] Real time data write to file, unexpected real time delay (rt_fifo.h)

On Thu, 18 Jul 2019 23:07:08 +0100 andy pugh wrote: > On Thu, 18 Jul 2019 at 22:01, Nicklas Karlsson > wrote: > > > It seems by no suprise writing real time to data to file within real time > > task have a negative impact on likelihood of real time delay. > > >

Re: [Emc-users] Real time data write to file, unexpected real time delay

On Thu, 18 Jul 2019 23:07:08 +0100 andy pugh wrote: > On Thu, 18 Jul 2019 at 22:01, Nicklas Karlsson > wrote: > > > It seems by no suprise writing real time to data to file within real time > > task have a negative impact on likelihood of real time delay. > > >

Re: [Emc-users] ... unexpected real time delay --> iptables: Permission denied (you must be root)

On Mon, 22 Jul 2019 10:13:59 -0400 Mark Wendt wrote: > On Mon, Jul 22, 2019 at 10:05 AM Nicklas Karlsson > wrote: > > > > I discovered iptables where not used which might be part of the problem and > > more important since write to file is normally not used. I think t

Re: [Emc-users] ... unexpected real time delay --> iptables: Permission denied (you must be root)

. On Thu, 18 Jul 2019 23:07:08 +0100 andy pugh wrote: > On Thu, 18 Jul 2019 at 22:01, Nicklas Karlsson > wrote: > > > It seems by no suprise writing real time to data to file within real time > > task have a negative impact on likelihood of real time delay. > > >

Re: [Emc-users] Real time data write to file, unexpected real time delay

On Thu, 18 Jul 2019 23:07:08 +0100 andy pugh wrote: > On Thu, 18 Jul 2019 at 22:01, Nicklas Karlsson > wrote: > > > It seems by no suprise writing real time to data to file within real time > > task have a negative impact on likelihood of real time delay. > > >

[Emc-users] Real time data write to file, unexpected real time delay

? Regards Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] OT; Induction servo motor

> On Sunday 30 June 2019 11:31:28 Nicklas Karlsson wrote: > > > On Sun, 30 Jun 2019 10:39:27 -0400 > > > > Gene Heskett wrote: > > > On Sunday 30 June 2019 06:18:24 Roland Jollivet wrote: > > > > A while back there was some discussion on using an indu

Re: [Emc-users] OT; Induction servo motor

because you'd need to record the home position as x > counts from the index. And I'd gate the z signal thru the home switch. > Home by driving to the home sw closure, then track the counts to the z > signal running in the same direction and call that home. > ... Vector co

Re: [Emc-users] OT; Induction servo motor --> Micrel/Microchip Ethernet PHY KSZ8081

> On Sun, Jun 30, 2019 at 8:21 AM Nicklas Karlsson < > nicklas.karlsso...@gmail.com> wrote: > > > > A while back there was some discussion on using an induction motor as a > > > servo motor. I can't find the thread.. > > > > You know howto

Re: [Emc-users] OT; Induction servo motor --> Micrel/Microchip Ethernet PHY KSZ8081

> A while back there was some discussion on using an induction motor as a > servo motor. I can't find the thread.. You know howto get Micrel/Microchip Ethernet PHY KSZ8081 to auto negotiate with each other and I give you some more help? ___ Emc-users

Re: [Emc-users] OT; Induction servo motor

e was no permanent magnets in > them, and there were no matching drives. > So they are induction, but perhaps made differently to your general > induction motor. > It's a beast of a motor for 200W...At least they come with a 1000 P/R > encoder 1000 P/R is

[Emc-users] Ethernet PHY KSZ8081, auto negotiation with others but not itself

negotiation work, ack is sent but link up never occur. Do anybody have any idea? Regards Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] LinuxCNC Processor

> We've been discussing various kinds of modules to make a dedicated LinuxCNC > processor. To run the real time part and put user interface on ordinary computer? Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforg

Re: [Emc-users] Increasingly OT: [Was: Re: How come.... --> Low voltage system --> cable price, copper expensive

On Mon, 27 May 2019 20:44:59 -0700 Chris Albertson wrote: > The low volts significantly raise the cost. I remember buying wire (some > years ago) for a system on my sailboat and paying $5 per foot. Copper is expensive so for cables higher voltage is cheaper. __

Re: [Emc-users] Increasingly OT: [Was: Re: How come.... --> battery safety due to high current, DC relay

> Theoretically, yes, an inverter would then also have less I²R losses than > at 48v. And there are 120v inverters ... Yes but there might be difference in voltage drop for transistors then maximum current is lower. For an electric motor sum of currents is the same so then wind for a higher volt

Re: [Emc-users] Increasingly OT: [Was: Re: How come.... --> Low voltage system

On Sun, 26 May 2019 13:07:51 -0400 Dave Cole wrote: > There are some good reasons to use a 24 or 48 volt DC bus power system > for smaller systems. > The chance of electrocution is pretty low for a 48 volt DC system in a > dry environment. > Once you get above 50 volts or so things change. Yes

Re: [Emc-users] Control theory book by "Michael Blösch"

anything else than a book about control theory. The list is impressive so to check the list of publications might be very usful. It is a common problem authour look young on book but are old in reality, I also slowly start to get the same problem. Regards Nicklas Karlsson Den tis 21 maj 2019 kl

Re: [Emc-users] Control theory book by "Michael Blösch"

gle.com/citations?user=fn6GhgoJ&hl=en > > > > On Tue, May 21, 2019, 7:10 AM Nicklas Karlsson > wrote: > > > I have two pages from some kind of book in control theory, it is a short > > summary. In the properties I find the name of author is "Michael Blös

[Emc-users] Control theory book by "Michael Blösch"

I have two pages from some kind of book in control theory, it is a short summary. In the properties I find the name of author is "Michael Blösch" do anybody about this author so I could find the book? Regards Nicklas Karlsson ___ Emc-use

Re: [Emc-users] Semaphores, from real time --> background process

now it is only used to put device in operational mode but it should also be able to handle non real time communication then there is a need or good idea to insert into the message sent periodically. Do not know how the rtapi_ semaphore is implemented but maybe tommoro

Re: [Emc-users] Unusual help request.

> On Sun, 19 May 2019, Davide wrote: > > > Date: Sun, 19 May 2019 16:26:26 +0200 > > From: Davide <77...@tiscali.it> > > Reply-To: "Enhanced Machine Controller (EMC)" > > > > To: Emc-users@lists.sourceforge.net > > Subject: [Emc-users] Unusual help request. > > > > Hi, I have a strange setup

Re: [Emc-users] Unusual help request.

On Sun, 19 May 2019 08:47:42 -0700 "John Dammeyer" wrote: > What's the maximum step rate you are using? Depending on the rate you can > probably use either RS485 drivers/receivers or CAN bus transceivers. The > RS485 is true differential while the CAN bus is pseudo differential relative > to

Re: [Emc-users] How come.... --> battery safety due to high current, DC relay

ut. The dead time may add some voltage distortion and some devices have lower voltage drop then turned on, otherwise current is thru free wheeling diode. Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

[Emc-users] Semaphores, from real time --> background process

I need a semaphore or similar to signal from periodic task initialization is needed. The concept of semaphores are weel known for me but in Linuxcnc I found several implements, ordinary posix, rt_sem, rcs_sem_t. Any idea which "implementation" is best to use? Nickla

Re: [Emc-users] How come.... --> battery safety due to high current, DC relay

On Fri, 17 May 2019 20:23:57 +1000 Erik Christiansen wrote: > On 16.05.19 21:18, Nicklas Karlsson wrote: > > > ... > > > I'd put the battery bank in an outbuilding.  If something shorts out and > > > the battery bank melts down, the little building

Re: [Emc-users] Lead acid batteries --> Redox flow batteries

long discharge/charge cycles but suspect short bursts of high power would be a problem. Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] How come....

> ... > I'd put the battery bank in an outbuilding.  If something shorts out and > the battery bank melts down, the little building may burn but my house > won't. There certainly is a lot of power from a byttery and it could be a little bit hard to turn off. You put a fuse at battery cable? I a

[Emc-users] Beagle bone, AM3358 Sitars, PRUs, (Seems to have the ordinary peripherals)

then using these devices because the harware is there and it would be a rather hard or impossible task at least then running a few peripherals at the same time. It is indeed a really good device but software PWM I do not believe as the hardware for is already there. Regards Nicklas Karlsson

Re: [Emc-users] Atomic pi --> software PWM

p so no reason to skip them for this. Some programmable logic might had been a good choice and or some peripherals like timers. Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] How come.... Batteries

Redox flow batteries might be a cheaper alternative. It might be likely not all available charging cycles are used for a long lasting battery. 20 cent per kWh hour, price for electricity I found in USA is in the range 7 - 23 cents per kWh, with an array on roof storage cost might be if you are u

[Emc-users] motmod, servo period (sometimes run to often), catchup?

If servo thread dead line is missed it try to catch this up later? Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

[Emc-users] motmod, servo period (sometimes run to often)

Then I set servo period to 1 000 000 ns = 1 ms sometimes it is run more than 3 times as often as supposed to. As I understand servo thread is run by motmod and period is set is a parameter. Do anybody have an idea what might be wrong? Nicklas Karlsson

Re: [Emc-users] possibly good news for LinuxCNC (Fieldbus)

Adding fieldbus support is without doubt something which really useful. I use a PLC at my workplace and it support several protocols, think it is: CANopen, Profibus, Ethercat, some other Ethernet, Modbus. > Maybe this will be the icing on the cake for LinuxCNC to make the jump to > 3.0? > >

Re: [Emc-users] Hardware emcmot?

I have been thinking in similar paths, there is NML communication between parts. Then trying to separate I got the impression maybe real time part work but axis did not work properly. I also get the impression real time performance have gotten better for ordinary Linux run on ordinary computer whic

Re: [Emc-users] SPI comms for linuxcnc (was Re: Rock64 pre-orders on Banggood.) --> CPU + Ethercat + FPGA/CPLD but no PRU

A CPU with Ethernet and a builtin FPGA/CPLD to implement the SPI ports would probably be a very good device for an SPI router, probably also very cheap. Packets could routed to ordinary computer running Linuxcnc as is today or split so that real time part is in the simple device. It is not to di

Re: [Emc-users] SPI comms for linuxcnc (was Re: Rock64 pre-orders on Banggood.)

t; and lights, thats ok. > > BTW: Theres 2 spi buses on the rpi3b > one SPI0 has 2 chip selects the other has 3 SPI1. That's enough for a few cheap boards with high bit rate. Nicklas Karlsson ___ Emc-users mailing list

Re: [Emc-users] SPI comms for linuxcnc (was Re: Rock64 pre-orders on Banggood.)

On Wed, 27 Mar 2019 11:53:52 -0700 Chris Albertson wrote: > I think in this current context we are talking about distances of not much > more than 10 centimeters. The signal would go from a GPOI header to a > real-time controller like an FPGA or uP. In typical use cases, SPI and > I2C never

Re: [Emc-users] SPI comms for linuxcnc (was Re: Rock64 pre-orders on Banggood.) --> protocol?

> ... > But if writing software you should not have to decide of lock in a certain > communications method. I like whatht ehauthors is ros-serial did, that > w=said "Use any communications method that has these four fuctions: open, > close, read, write. THat pretty much means anything from a net

Re: [Emc-users] SPI comms for linuxcnc (was Re: Rock64 pre-orders on Banggood.)

spi grail > > tomp > > > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Mister/Coolant --> health problem

> Just spent 2-3 years wondering why I kept getting sick so often and sometimes > coughing for 3-4 hours a day. (I'm a non smoker and otherwise healthy) I spent > most of the weekend machining aly blocks with coolant splashing all over the > place on a knee mill and on Sunday night felt really sick

Re: [Emc-users] CANopen configuration files, CiA 309-3 --> battery charing like home brewn mash, nothing about CiA 309-3?

On Sun, 17 Mar 2019 19:03:07 -0400 Gene Heskett wrote: > On Sunday 17 March 2019 17:56:02 Nicklas Karlsson wrote: > > > > ... > > > So once every 1/2 second a message starting with 0x40A shows up on > > > the bus and everyone sees it. The Charger and in this ca

Re: [Emc-users] CANopen configuration files, CiA 309-3 --> battery charging

> The worst thing thats happened to te life of a LA battery in the last 50 > years has been the incorporation of the regulator into the alternator, > adding the resistance of the cable which softens the curve a lot, and > the relatively quick heating of the alternator. Way faster than the > ba

Re: [Emc-users] CANopen configuration files, CiA 309-3

> Nicklas, as soon as a lead-acid battery bubbles, it's losing water and > the plates cover with lead sulphate, increasing capacity and intrinsic > resistance. No, no. You have to stop then then the lead-acid battery bubble like home brewn mesh. > I got myself a handful of cheap 74N137 stabiliz

Re: [Emc-users] CANopen configuration files, CiA 309-3

vice over TCP/IP and as I added it could be used to access dictionary of devices connected to Linuxcnc. Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] CANopen configuration files, CiA 309-3

what is needed from dictionary and for configuration using the manual and/or a *.eds/*.dcf or esi *.xml file if available. I did not find binary protocol. Do anybody know about a configuration tool which use or may use an CiA 309-3 gateway for communication? Or parse dictionary files? Nick

Re: [Emc-users] STM32 Blue Pill

> About the ICE, all ARM processors have hardware debuggers built-in. > This helps a LOT with the case you described where you must > debugging in the field. Just any notebook PC and a USB cable. Debugger for ARM is good. Trace function is really good then available, printf(...) is often very

Re: [Emc-users] STM32 Blue Pill --> Microchip pin configuration

> Too true. The level of support for Microchip still exceed many of the other > systems. Having said that I'd still rather use MPLAB-8 compared to MPLAB-X > but I can see why Microchip had to go in that direction. ... I remember Microchip Micro controllers have a lot more freedom then it come

Re: [Emc-users] STM32 Blue Pill

n top of this but even going for a higher level programming there is always the problem if a bit is there are not. Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Cheap vs expensive solar Re: OT: Where's them fires. [Was: Re Conversational mode.

On Mon, 11 Mar 2019 09:19:48 + (UTC) Gregg Eshelman via Emc-users wrote: > This guy in Australia tested a cheap $90 100 watt panel and one that cost a > lot more. The $90 panel significantly out performed the expensive > panel.https://www.youtube.com/watch?v=3-sc4rlV93g I think there are

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