CNC Sewing machine question

andypugh wrote:

Does it give a clue as to why it is e-stopping? Is there a message about following error, for example?

The dac module gives the error that no uart signal is received, may be this gives a clue.
This may be because i made a mistake while configuring linuxcnc. I made axis0 and axis1 use stepgen module and axis2 use pid. Is this true to use stepgen and pid in one conf?

andypugh wrote:

ahmetbm wrote:

Is this true to use stepgen and pid in one conf?

That shouldn't be a problem.

Have you tried asking the GM folk for help?

Some times they give answer helpfully, however other times i wait too long.

andypugh wrote:

Sorry to also be slow. I am away from home skiing.
It should not be a problem to have stepgen and PID. In fact the Mesa configs almost always have both.

Thank you, however when i use this config, i face the problem that i earlier mentioned above posts.

At last i was able to rotate motor with dac. Unfrtunately i have 2 issues:

1) Can i run 2 motors with dac, synchronously(exact timing), one motor for turning needle and the other motor is for turning the bobbin, since needle penetrates into to bobbin hole hundreds of times in a minute i need exact timing not to hit and break needle?

2) I can use needle and bobbin motors as third and fourth axis. However after thread break the machine needs to go back and all the motors rotates back, and this is expected. I wonder if there is a way to make third and fourth axis motors not to rotate back but decrease their coordinate value?

I hope the questions are clear.

We are preparing the setup for master slave running. However i was not able to find hexagonal boring post.
Thanks.