[Emc-users] stepper lose steps at low speed

2015-03-03 Thread Tomaz T .
What could be the reason that stepper is losing steps at very low speeds? On my machine I have servos for XYZ axes (Pico control), and two (leadshine) hybrid steppers for rotary axes, which I found out that they are loosing steps at very low speeds. I think it might not be related to driver

Re: [Emc-users] stepper lose steps at low speed

2015-03-03 Thread Dave Caroline
Make sure you dont power down, stay at full power, you did not mention microsteps, Are you expecting higher resolution and accuracy than is possible with a stepper. You can see regular accuracy error due to the stepper when I tested a linear axis http://www.archivist.info/cnc/screw_error/ I also

Re: [Emc-users] stepper lose steps at low speed

2015-03-03 Thread Andy Pugh
On 3 Mar 2015, at 17:27, Tomaz T. tomaz_...@hotmail.com wrote: What could be the reason that stepper is losing steps at very low speeds? It could be that the drives are of a type that switches to a standby current when idle. (Though if that always caused problems they clearly wouldn't do

Re: [Emc-users] stepper lose steps at low speed

2015-03-03 Thread Marius Liebenberg
-03 18:27:50 Subject: [Emc-users] stepper lose steps at low speed What could be the reason that stepper is losing steps at very low speeds? On my machine I have servos for XYZ axes (Pico control), and two (leadshine) hybrid steppers for rotary axes, which I found out that they are loosing steps

Re: [Emc-users] stepper lose steps at low speed

2015-03-03 Thread Tomaz T .
Microstep is set to 4000, gearing is 21:1 and it has very very small backlash and its well above my accuracy needs. The thing is that at very low speeds (ie 50deg/min on motor side) it loses so many steps that the error is more then few degrees after reaching final position... Make sure you

Re: [Emc-users] stepper lose steps at low speed

2015-03-03 Thread Jon Elson
On 03/03/2015 11:39 AM, Tomaz T. wrote: What could be the reason that stepper is losing steps at very low speeds? It could be that the drives are of a type that switches to a standby current when idle. (Though if that always caused problems they clearly wouldn't do it) A recent similar

Re: [Emc-users] stepper lose steps at low speed

2015-03-03 Thread Tomaz T .
What could be the reason that stepper is losing steps at very low speeds? It could be that the drives are of a type that switches to a standby current when idle. (Though if that always caused problems they clearly wouldn't do it) A recent similar problem on the forum went away when he