Need Help!- Drive wanted for Gould brush servo motor

[Tom Curran]

Good day, everyone.

I am using the original drives and servos on my Tree mill, control is now CamSoft.

I just lost my Z axis drive.

I want a new made drive that will work with my older Gould brush motors w/tach feedback. Suggestions welcome for replacement drives.

Thanks, Tom

Motor info:
Gould
permanent Magnet Motor
Cat # 16-0143-04
Serial 985393
Back EMF Ke 34.2 V/KRPM
Tach 9.5V/KRPM
Torque Constant Kt 2.89 Lb-In/Amp
Sealing IP-55
Rated Current Ic Stall 12.5 AMP

[Al_The_Man]

There will be a suitable model on the AMC site.
ADVANCED Motion Controls - servo drives and motor drivers with Advanced Motion Control
With Camsoft/Galil you can dispense with the tach if you wish and use torque mode.
AS well as brushed versions, the B prefix versions are DCBL and will operate a DC brushed with no problem, the AC suffix indicates built in power supply, this you probably do not need.
Al.

[mike_Kilroy]

agree with Al the amc is the way to go. pick it also to limit max dc bus voltage to 160vdc or less (that is what ur motor is rated max) or it can destroy the motor (too much brush sparking).

agreed you can try torque mode and POSSIBLY eliminate the tach (KISS principal - less to break later). To do this you will need a pretty good resolution on your Z axis encoder. I stopped using Galil quite a few years ago so not sure what PPR encoder count minimum you need, but my guess is around 2500ppr min or the tach sig made inside the galil will be too crude for good performance compared to what you are used to with your nice analog tach. Today I won't design a system with less than a million PPR. So buy a drive with tach input and that way you are covered (if it has tach input, you can use it or not; if it does not have tach input you may be limited in performance).

[Tom Curran]

Thanks for your input, gentlemen.

I should add that the encoder is mounted on the ballscrew, and the motor powers the ballscrew via gearbelt. Tach is on the end of the motor shaft.

[Al_The_Man]

I have been using the AMC & Galil combination since the '80's and find they work well together.
I believe all the AMC brushed amps have the tach velocity function if you need it, I found I got tighter control with torque mode.
This is also demonstrated in the Galil instructional videos.
Al.