analog servo amp options for 5i25/7i77

Hi,

I am plugging away at my knee mill conversion from a Heidenhain 145 to EMC with 5i25 and 7i77 board. I had planned to reuse the Contraves NC400 series servo drives. Unfortunately one of the drives is faulting and I have traced the issue to a board component with the help of an electronics specialist (I'm not smart enough to figure that out).

I would like to explore some other servo drive options if I can't save this one. Can anyone suggest some drive options to be used with the analog output of the 7i77 and 90-100VDC motors. Also, the current NC400 uses the tachometer output from the motor to control velocity and direction while the linear scales control position. Are there other drives that will operate the same, are reasonable price, light industrial quality, and straight forward to setup? I know thats a tall order but I'm asking anyway.

Thanks,
Paul

Those AMC drives look pretty good, but if the supply voltage is over 75v then they won't be suitable.

However there are usually quite a few AMC drives on ebay at any one time. I replaced my ageing Anilam drives with some AMC BE25A20G's - they were easy to setup, silent(!) and seem to work well. My mill uses linear scales, 5i25/7i77 and tach feedback from the motors to the drives. I'm going to try mounting rotary encoders on the end of the motors to reduce hunting owing to the low resolution of my linear scales - these may feed back to the drives or LinuxCNC - we shall see!

As indicated by Andy the AMC site has good documentation for all of their products available for download.

Ben