Hi all
Anybody still using servo motors with Built in tachometers, if so, can they be run from Mach 3 plasma
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Hi all
Anybody still using servo motors with Built in tachometers, if so, can they be run from Mach 3 plasma
One reason they do not sell servo motors with tachometers any more is they are no longer used on modern drives.
These were used in the velocity mode with two loops to tune, the the tach to drive and the encoder to controller.
At the very least, if keeping the motors, remove the tach or its brushes and refit with modern drives that can be used in torque mode etc.
Al.
Ok, thanks
So if I remove the tach, how would the positions of the motor's be read,
I have not much experience with servo,
I understood that servo needed something to transfer information back to the CNC control
As stepper motors don't,
I could retro fit this machine with steppers but I hear that servo is more precise, and also since I already have these servo/gearbox units it would be handy if I could still use them
Quote:
Originally Posted by Al_The_Man
You need to fit encoders to the motors, in some cases through-hole encoders can be used by using the old Tach shaft, otherwise you would need to mount them with couplers.
Modern servo's come with encoders attached, usually.
Al.