Need Help!- synchronize two motor in one axis

[ferdi_mcrohl]

hi
i'm a newbie in EMC2 and I need help for my final project

I use two motor for Y-axis
how can I synchronize these two motor in EMC2 so they can move straight??

for your information I use
- mesa 5i20 & 7i33
- yaskawa motor for axis

thnx b4

[PCW_MESA]

Originally Posted by ferdi_mcrohl hi i'm a newbie in EMC2 and I need help for my final project I use two motor for Y-axis how can I synchronize these two motor in EMC2 so they can move straight?? for your information I use - mesa 5i20 & 7i33 - yaskawa motor for axis thnx b4

Simple synchronization is easy, just drive the two PID loops of the slaved axis from the same source:

net emcmot.00.pos-cmd axis.0.motor-pos-cmd => pid.0.command
net emcmot.00.pos-cmd axis.1.motor-pos-cmd => pid.1.command

The tricky part is homing. I believe one of the EMC developers is currently working on gantry homing. You might ask on the EMC-users list

[ferdi_mcrohl]

Originally Posted by PCW_MESA Simple synchronization is easy, just drive the two PID loops of the slaved axis from the same source: net emcmot.00.pos-cmd axis.0.motor-pos-cmd => pid.0.command net emcmot.00.pos-cmd axis.1.motor-pos-cmd => pid.1.command The tricky part is homing. I believe one of the EMC developers is currently working on gantry homing. You might ask on the EMC-users list

I see,,,thanks for the answer,, it really inspires me
So we use axis.0 - axis.4
but how we manage to display to AXIS??
Is it automaticly detect that we use 3 axes??

[seniormachinist]

Wouldn't it be simpler and cheaper to use one motor and a chain/sprocket to drive the other ballscrew?

SM

[lumberjack_jeff]

I run a mechmate. The X-gantry is driven by two steppers (and two drivers).

In the stepconf wizard, Pins 2 and 4 are both assigned to to x-step and pins 3 and 5 are both assigned to x-direction. The "invert" checkbox for pin 2 is on.

The invert function assures that the stepper attached to pins 2 and 3 are driven opposite rotation from the stepper attached to pins 4 and 5.

[ferdi_mcrohl]

Originally Posted by seniormachinist Wouldn't it be simpler and cheaper to use one motor and a chain/sprocket to drive the other ballscrew? SM

I think like that too
but it's not my authority to define the specification, it's my professor's..
I think I need to talk about this to my professor
thanks for the advice