Umrüstung einer Sinumerik 3T 3-Achs Drehmaschine

Leow91 wrote:
But one thing dont my c-axis is Not getting stiff enough ! And i can Even move the spindle by Hand 5 degrees in each direction!

Is the loop closed in Linuxcnc ? If yes, that would mean you need to add more P and maybe just a litle I term to tuning parameters of the PID loop.

Nein es war vorher eine Sinumerik 3T verbaut.
Das dürfte die Version vor der 802D sein aber so ähnlich könnte ich es mir vorstellen.
Hast du noch informationen welche Karten das sind?

Danke & Gruß

Tommylight any recommendation how to tune the pid parameters?

I already posted a link to servo tuning and i added more info thanks to PCW for FF1 calculation, so you should have a look at the very first post.

-turn the motors by hand while the drives are disabled and check the DRO if the encoders are wired properly and counting up and down as the table moves, make shure they are counting in the right direction
-set P to 30
-set deadband to something like 0.0001
-leave everything else at 0
-set the jog speed in Axis GUI or Gmoccapy to 50mm/m
-enable machine/drives
- try a short jog, check the DRO and also check the motor for vibrations
-try another longer jog, again check DRO and vibrations
- if no vibrations add more P
-if to much vibrations less P
-try jog again
This should just get you going, for nore check the tutorial, take your time with it, it looks hard but after you get the first tune right, the rest is easy.
MFG
Tom.

tommylight wrote: set P to 30

Can I just suggest, if retrofitting, start with P=1 - coming from personal experience, I had to reduce to P=0.6, but some further refinement might get it back up to 1.