AlfaGTA
Diamond
- Joined
- Dec 13, 2002
- Location
- Benicia California USA
I have an older CNC machine (Deckel) that is fitted with a Siemens HU 3078 0AC01 DC servo motor.
My question is there a way to re-charge the magnet on the brake...
This servo is fitted with a magnetic brake...Normally engaged when no power is applied . There is a magnet that holds against a steel faced coil.
When the coil is energized the magnet is released (repulsed) and the servo is free to rotate....
I have two of these machines the same size etc...the older one has a very weak brake...I can easily overcome the hold of the brake using the hand wheel, something i can't do on the other machine....
Further, when powered down the "Z" axis drops by .020 -.030" ...and i believe this is a function of the brake's poor holding power....
Is there a reliable way to give the magnet more hold....Increase its flux?
Hoping not to have to remove the magnet from the machine as the wiring is a little problematic to get in out then back in place.
Cheers Ross
My question is there a way to re-charge the magnet on the brake...
This servo is fitted with a magnetic brake...Normally engaged when no power is applied . There is a magnet that holds against a steel faced coil.
When the coil is energized the magnet is released (repulsed) and the servo is free to rotate....
I have two of these machines the same size etc...the older one has a very weak brake...I can easily overcome the hold of the brake using the hand wheel, something i can't do on the other machine....
Further, when powered down the "Z" axis drops by .020 -.030" ...and i believe this is a function of the brake's poor holding power....
Is there a reliable way to give the magnet more hold....Increase its flux?
Hoping not to have to remove the magnet from the machine as the wiring is a little problematic to get in out then back in place.
Cheers Ross