VFD bridgeport.
Originally Posted by
zoeper
Can anyone fill me in on the pro's and conns of fitting a bridgeport type mill with a VFD?
I suppose that low speed torque would be sacrifised, but how feasable is it?
My controll (Anilam crusager G)outputs a analog voltage to controll speed and at present it is hooked up to a motor and "controller" board that changes the handwheel on the head. it is slow to opperate and only acurate/ repeatable to about 30% of the programmed value. The analog signal should be easy to hook up to the VFD though.
Thank you
Pieter
I have a hitachi sj200 sensorless vector drive hooked to my bport btc-1.
It came from the factory with an early vfd and a 2 speed gear box along with a 3hp motor. The sensorless vector helps with the low speed torque and is the way to go in my opinion. I am working on integrating the 2 speed to be controlled by Mach3. As it is now, If I have to go into low gear, I have to do it manually.
See my build log here. http://www.cnczone.com/forums/showthread.php?t=66994
There has been some discussion that the gear spread is too wide to work properly but so far it is working well for me, not that I have done much maching with it yet.
Warning: DIY CNC may cause extreme hair loss due to you pulling your hair out.