Re: [Emc-users] axis increments: dangerous behavior?

On 20 Apr 2008 at 2:52, Gary Fixler wrote: While it won't help your keypad experiments, the behavior you seek is in halui. http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Simple_Remote_Pendant On another note when I am testing out motion commands I unplug my machine so if I get experience instead

Re: [Emc-users] axis increments: dangerous behavior?

These kinds of experiments have always been interesting to those testing EMC. We do tend to test in air or in sim rather than with a live machine out there. I've often thought of the man overboard key on a boat as making an ideal estop. Connect the cord to one of the body parts that is

Re: [Emc-users] 7i33 breakout

Hi i use MESA breakout board to convert 7i33 output. i have 2 of them, i building 8 axis unit. thanks aram Hi all, Finally got around to making mounts for my 7i33 and 7i37 with breakouts. The image is the 7i33 with breakout and Honda MR-20 connectors for the encoders. Maybe someday I'll get

[Emc-users] Very low PRM system.

Hi I want to build system to tool grinder and that means that my system should behave stable on very low RPM. Minimum PRM 0.0001 per minute. I want to use direct drive with ball screw 5 rev per inch or 1 rev for 5 mm in case of metric system. My motors have 8192 pulse per ….. it takes 4x8192 per

[Emc-users] PID-tuning

Hi all, I got my x-axis servo motor mounted today and ran some tests. There is a video and some hal-scope screen shots here: http://www.anderswallin.net/2008/04/x-axis-test/ This is a system with no motor current, motor voltage, or velocity feedback. An m5i20 generates PWM output for

Re: [Emc-users] PID-tuning

hi you said that Clearly higher feed-rates are more difficult for the PID loop. what about tunup problem with very slow motion? i mean feed with 0.0001 per minute. i use ball screw 5 mm per revolution thanks aram Hi all, I got my x-axis servo motor mounted today and ran some tests. There

Re: [Emc-users] Very low PRM system.

Aram, I have no answer but a caution... When you move at .0001/min, will a 'step' of .0001 every minute be ok? I'm not talking about stepper motors, I'm saying some analog servo controls will simply force a jerk of .0001 every minute, They will not move in an analog fashion at that rate.

Re: [Emc-users] Very low PRM system.

[EMAIL PROTECTED] wrote: Hi I want to build system to tool grinder and that means that my system should behave stable on very low RPM. Minimum PRM 0.0001 per minute. I want to use direct drive with ball screw 5 rev per inch or 1 rev for 5 mm in case of metric system. My motors have 8192

Re: [Emc-users] PID-tuning

Anders Wallin wrote: Hi all, I got my x-axis servo motor mounted today and ran some tests. There is a video and some hal-scope screen shots here: http://www.anderswallin.net/2008/04/x-axis-test/ This is a system with no motor current, motor voltage, or velocity feedback. An m5i20

Re: [Emc-users] PID-tuning

On Sun, Apr 20, 2008 at 11:19:29PM +0300, Anders Wallin wrote: The last pic shows moves at different feed-rates. All of them show around 16 to 25 count spikes during the acc/dec. phases. Presumably at the moment when acceleration changes and jerk is infinite. How much have other people

Re: [Emc-users] PID-tuning

Hi Aram, I'm certainly grateful that this is not my application because I suspect there are a lot of compromises to be made. Assumptions: a. the system doesn't need accuracy in both directions; i.e. is not backlash sensitive b. it really does not have to be direct driven

Re: [Emc-users] PID-tuning

On Sun, 20 Apr 2008, Anders Wallin wrote: Date: Sun, 20 Apr 2008 23:19:29 +0300 From: Anders Wallin [EMAIL PROTECTED] Reply-To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: [Emc-users]

[Emc-users] Please I need a direction to use EMC to do a very a small project..

Hello Fellow EMC users, I want your help in a step by step approah to use the EMC to power a small equipment; like putting on a light and also get a feedback on the state ON/OFF of the light or solenoid. I'm a begininner in this and would be very eager to learn. I would be glad

[Emc-users] VFD Interference

I got the spindle VFD working on my Shizuoka and the speed varies quite a bit. This seems to be due to interference coming from the spindle motor leads. The cable has no shielding but there are six wires. One for each phase, and three more that seem to connect together at the motor end, but not to

Re: [Emc-users] PID-tuning

[EMAIL PROTECTED] wrote: hi you said that Clearly higher feed-rates are more difficult for the PID loop. what about tunup problem with very slow motion? i mean feed with 0.0001 per minute. i use ball screw 5 mm per revolution I can test low feed rates when I have time. Probably need to