Re: High Voltage servo cards

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Mark Vaughan" <mark@...> wrote:

>

> My motors are SEMMT30U4-57's,
>
> 57V/1000PM, 140V but I have a 160V supply which SEM say is still OK,
>
> 40lB/in TENV stall torque, at 8.3 amps without forced cooling.
>
> Peak stall talk 192lb/in at 47 amps, Armature 1.1 Ohm less brushes,

8.1mH

>
> Do you see any problems here.

What size mill do you have that you need these monster motors?
Even a BP Series 2 will run just fine with 28 in-lb continuous
torque motors with a 2:1 ratio.
Gecko's will run these motors just fine although you will sacrafice
speed due to the 80v limit. Ron Rogers runs this size motors on his
BP using Gecko's- in a commercial enviroment. He seems to not have
any problems.
I am not suggesting using Gecko's, just making a point that a
drive rated much lower voltage and current will run those motors.

Scott