Re: [Emc-users] Mesa 5I25 Stepping when linuxcnc is not running
On 12 Jun 2014, at 15:49, Peter C. Wallace p...@mesanet.com wrote: As far as I can see the watchdog should bite when linuxcnc is not running, switching outputs to high impedance. The drives are connected via 330R and an 6N137. http://www.uhu-servo.de/UHU_PCB_3_13.pdf There is no way they can move on high impedance input. They stop moving when I pull the cable from the mesa card. The same setup rund without problems using the parport, apart from a few steps generated during bootup. I have another mill with a similar setup, but with a chargepump. A chargepump will fix this, but anyway, the mesa card must not output steps when Linuxcnc is not running… Rene The 5I25 will _not_ output steps when linuxcnc does not command them. I suspect you have an interface problem of some kind. This will probably have to be resolved with a voltmeter or scope. It was. the pullups are to big to drive the 6n137. The current was exactly at the switching point, causing them to step very fast. they seem to have no hystereses, the steps are almost invisible on the scope. additional pull-ups helped. maybe it is even better to connect the 6n167 to +5V instead of GND. Thanks, Rene -- Open source business process management suite built on Java and Eclipse Turn processes into business applications with Bonita BPM Community Edition Quickly connect people, data, and systems into organized workflows Winner of BOSSIE, CODIE, OW2 and Gartner awards http://p.sf.net/sfu/Bonitasoft ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Mesa 5I25 Stepping when linuxcnc is not running
Hi, Today I converted a mill form parport to 5I25, using 5i25_r990x2.bit bitfile. Everything was running good. Having a mesa card, I wanter to increase the speed. When I closed linuxcnc, X and Y ran into the endstops at full speed. Thinking of watchdog problems, I removed the pet function from the servo thread. The hal pin indicates the watchdog has bitten, and I get no steps. But when I exit linuxcnc I get steps in X and Y. Rebooting shows that the steps are generated as soon as I press the power button, and do not stop until I start Linuxcnc. I already tried reflashing the bitfile. As far as I can see the watchdog should bite when linuxcnc is not running, switching outputs to high impedance. The drives are connected via 330R and an 6N137. http://www.uhu-servo.de/UHU_PCB_3_13.pdf There is no way they can move on high impedance input. They stop moving when I pull the cable from the mesa card. The same setup rund without problems using the parport, apart from a few steps generated during bootup. I have another mill with a similar setup, but with a chargepump. A chargepump will fix this, but anyway, the mesa card must not output steps when Linuxcnc is not running… Rene -- HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing Easy Data Exploration http://p.sf.net/sfu/hpccsystems ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Mesa 5I25 Stepping when linuxcnc is not running
On Thu, 12 Jun 2014, Rene Hopf wrote: Date: Thu, 12 Jun 2014 12:31:22 +0200 From: Rene Hopf reneh...@mac.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] Mesa 5I25 Stepping when linuxcnc is not running Hi, Today I converted a mill form parport to 5I25, using 5i25_r990x2.bit bitfile. Everything was running good. Having a mesa card, I wanter to increase the speed. When I closed linuxcnc, X and Y ran into the endstops at full speed. Thinking of watchdog problems, I removed the pet function from the servo thread. The hal pin indicates the watchdog has bitten, and I get no steps. But when I exit linuxcnc I get steps in X and Y. Rebooting shows that the steps are generated as soon as I press the power button, and do not stop until I start Linuxcnc. I already tried reflashing the bitfile. As far as I can see the watchdog should bite when linuxcnc is not running, switching outputs to high impedance. The drives are connected via 330R and an 6N137. http://www.uhu-servo.de/UHU_PCB_3_13.pdf There is no way they can move on high impedance input. They stop moving when I pull the cable from the mesa card. The same setup rund without problems using the parport, apart from a few steps generated during bootup. I have another mill with a similar setup, but with a chargepump. A chargepump will fix this, but anyway, the mesa card must not output steps when Linuxcnc is not running… Rene The 5I25 will _not_ output steps when linuxcnc does not command them. I suspect you have an interface problem of some kind. This will probably have to be resolved with a voltmeter or scope. -- HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing Easy Data Exploration http://p.sf.net/sfu/hpccsystems ___ 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. -- HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing Easy Data Exploration http://p.sf.net/sfu/hpccsystems___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
