Fehlmann Picomax 100 Retrofit

Yes they do vibrate still.
Drift I could compensate in the drives. but there is almost none.

Sounds like maybe a grounding/input connection issue.

Drift compensation is not terribly important as the drives should
never be enabled when the feedback loop is not closed.
(and a small offset causes minimal error)

Do the motors have Tacho Geber ?
Is it wired to the drives?
-
If yes, then most probably grounding/shielding/wiring as PCW mentioned.

No Tacho (analog) signal from the motor to the drives, they use 2000 line encoders.
And when I use internal signals from the drives they run smoothly. Even with a potentiometer test setup from a 9v battery using another connection, No oscillation.
What I didn’t check was disconnecting the analog wire from the mesa board and have just the open wire or use the battery and the cables running to the mesa board.

Hello,
I would like to ask you, if you have any original remaining parts. I Have Picomax100 too, but still with TNC155. I´m looking for handbox and boards, because the board for A-axis is missing. Eventual I would like to buy other remaining parts.

Thank you very much
Have a nice day

Hi,

I still got some of the old parts.
Like transformer, servo drive, two servos.
Spindle motor, spindle drive and handbox.
The tnc155 and two servos are already sold.
But I can’t tell if they worked properly, cause I never really tried to run them. The lower panel I might also got one left.

Cheers Patrick