Re: [Emc-users] Good URL to look up auto-technology motor specs?
Try this one: Automation Technology Inc | | | | | | | | | | | Automation Technology IncCopyright 2011 | Automation Technology Inc. Automation Technology Inc 2104 Stonington Ave, Hoffman Estates, IL 60169 Email: automationtech...@yahoo.com Ord... | | | | View on www.automationtechn... | Preview by Yahoo | | | | | +++ Anyone who believes exponential growth can go on forever in a finite world is either a madman or an economist. -Kenneth Boulding, economist “How unfortunate that the Earth’s first intelligent social animal is a tribal carnivore” -E.O. Wilson, sociobiologist From: Gene Heskett ghesk...@wdtv.com To: emc-users@lists.sourceforge.net Sent: Monday, December 29, 2014 12:42 PM Subject: [Emc-users] Good URL to look up auto-technology motor specs? Greetings; The function generator arrived today, so I have the potential PSU, one 2M542 driver, and an A.T. KL23H266-20-8B motor setup to test how is the best way to run it. The first thing I notice is that its maximum current draw, when the driver is set for a hair under 2 amps, is actually at about 350 rpm. I think my Greenlee digital amprobe fades below that frequency, and I have no clue what its response when the excitation frequency is well above 60hz. Anyway, with 46 volts available, with this 8 wire motor wired for series as a 4 wire, nominally 1.81 amps of drive according the the dip switch chart on the driver, and the rpm divisor set at 6400/rev, I can drive it to somewhat above 300Khz giving a hair over 2812 rpm. But the inductance sure seems to be crippling it as it is only drawing about .43 amps at that speed. So I may go back out and see how it runs wired in parallel. I also note that the opto's in the driver are about done at 750Khz when its set for a 25600 per rev divisor. The motor stops and doesn't even squeek when its sitting there stalled. Its just locked up as if the drive failed. But I haven't tried it as a paralleled coil drive yet. But I'd sure like to find an AT chart showing this motors nominal performance. I struck out at www.automationtechnology.com, getting the impression I was not even on the right companies site. Has anyone a better URL? Thanks everybody. Cheers, Gene Heskett -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) Genes Web page http://geneslinuxbox.net:6309/gene US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS -- Dive into the World of Parallel Programming! The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming! The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Stepper specs pdf link
On Tuesday 30 December 2014 16:23:13 Greg Bentzinger did opine And Gene did reply: And I CC'd the list, as others may be interested in the conversation too. http://www.automationtechnologiesinc.com/wp-content/uploads/downloads/2 012/08/KL23H286-20-8B.pdf I did find that, but this one is marked as a 266, not 286. And my drivers can do 4.2 amps, however that would equal fried motor in short order at the lower rpms used for working speeds. I tried it once at 3.3, and took a room temp motor to way too hot to touch without a potholder in about 5 minutes. You are of course right, while I can get 3500+ revs out of it, that 2.3 amps, or 2.8 amps, is in no danger of overheating the motor as its only showing around .7 amps at that speed, wa too much inductance. IOW turning up the current only works at speeds where the current regulation in the driver works, and its fading away already below 500 rpm. To really use it at insane speeds would take a driver rated at 300+ volts. But I have an investment in the 2M542's by the 8 pack, so they will have to do. Leadshine has others, but I think they quit at 80 volts under 10 amps. And their site is broken tonight, main page is ok, but clicking on anything stepper gets a page not found. Looks like Wantai has an 80 volter at 5.6 amps CCS for about a $70 bill. On fleabay of course. No experience with it. For me, the 2m542 has been bulletproof. The limits I found yesterday are more related to the speed of the opto's in it than anything else, they simply aren't up to it when the PRR gets above 350 kilohertz. And thats 2x faster than the specs... I have one of these - they are the biggest motor the 3.0A and under drivers can push but the 6.8mH is a real downside on performance. Running serial drives that number into the insane range at about 27mH, so parallel is definitely the way to go when you have a driver that can run at 2.8A without overheating. Cheers, Gene Heskett -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) Genes Web page http://geneslinuxbox.net:6309/gene US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS -- Dive into the World of Parallel Programming! The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Possibly dumb question - 7i76 encoder for spindle speed feedback
Hi all; I'm back working on my mill with spindle tachometer, to utilize Andy Pugh's automatic spindle speed selector example code. I have, from the spindle sensor, input going to a 6N138 optoisolator's input. Ground and voltage source tied to machine. It sources enough current to drive the input quite well. (originally sent to the input of an Amtel processor in the LED spindle speed display) Output of 6N138, with +5v, ground, to the 7i76 ENCA+ and surrounding connectors on the 7i76. Looking with Halscope gives me a pretty good signal on hm2_5i25.0.encoder.00.input-a. Running at 1,000 rpm gives me 14 square teeth, running at 500 rpm gives me 7, and running at 300rpm gives me 4. (not that the counts mean much, except that the reading tracks spindle speed linearly) The 7i76 jumper is set for TTL input. ONLY the ENCA+ input pin has anything connected, the IDX, ENCB+/- and ENCA- are all left floating. The issue I have is that the velocity never seems to do much other than just futz around between 6 and 40, no matter what the spindle speed. Here's my ini code: setp hm2_5i25.0.encoder.00.counter-mode 1 setp hm2_5i25.0.encoder.00.filter 1 setp hm2_5i25.0.encoder.00.index-invert 0 setp hm2_5i25.0.encoder.00.index-mask 0 setp hm2_5i25.0.encoder.00.index-mask-invert 0 setp hm2_5i25.0.encoder.00.latch-enable 0 setp hm2_5i25.0.encoder.00.scale -16 setp hm2_5i25.0.encoder.00.vel-timeout 1.0 Should I tie the other encoder lines high/low or to somewhere? (especially the index pulse) Anybody with some advice? Thank you - John A. Stewart. -- Dive into the World of Parallel Programming! The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Possibly dumb question - 7i76 encoder for spindle speed feedback
On Tue, 30 Dec 2014, John Alexander Stewart wrote: Date: Tue, 30 Dec 2014 21:45:14 -0500 From: John Alexander Stewart ivatt...@gmail.com Reply-To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: [Emc-users] Possibly dumb question - 7i76 encoder for spindle speed feedback Hi all; I'm back working on my mill with spindle tachometer, to utilize Andy Pugh's automatic spindle speed selector example code. I have, from the spindle sensor, input going to a 6N138 optoisolator's input. Ground and voltage source tied to machine. It sources enough current to drive the input quite well. (originally sent to the input of an Amtel processor in the LED spindle speed display) Output of 6N138, with +5v, ground, to the 7i76 ENCA+ and surrounding connectors on the 7i76. Looking with Halscope gives me a pretty good signal on hm2_5i25.0.encoder.00.input-a. Running at 1,000 rpm gives me 14 square teeth, running at 500 rpm gives me 7, and running at 300rpm gives me 4. (not that the counts mean much, except that the reading tracks spindle speed linearly) The 7i76 jumper is set for TTL input. ONLY the ENCA+ input pin has anything connected, the IDX, ENCB+/- and ENCA- are all left floating. The issue I have is that the velocity never seems to do much other than just futz around between 6 and 40, no matter what the spindle speed. Here's my ini code: setp hm2_5i25.0.encoder.00.counter-mode 1 setp hm2_5i25.0.encoder.00.filter 1 setp hm2_5i25.0.encoder.00.index-invert 0 setp hm2_5i25.0.encoder.00.index-mask 0 setp hm2_5i25.0.encoder.00.index-mask-invert 0 setp hm2_5i25.0.encoder.00.latch-enable 0 setp hm2_5i25.0.encoder.00.scale -16 setp hm2_5i25.0.encoder.00.vel-timeout 1.0 Should I tie the other encoder lines high/low or to somewhere? (especially the index pulse) Anybody with some advice? Thank you - John A. Stewart. If the inputs are jumpered for TTL levels you must leave the -inputs unconnected. The + inputs have 2K pullups to 5V so will be in a high state if left open. I forget the 7I76 encoder polarity but you may need to ground the ENCB+ input to get the count direction correct (ENCB is the direction input in count = COUNT/DIR mode ) -- Dive into the World of Parallel Programming! The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your ()_() signature to help him gain world domination. -- Dive into the World of Parallel Programming! The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
