Hi all,

I got my servo's from AliExpress direct from China, they are fitted to a Bridgeport mill(ex manual style machine) I got 700W on X&Y and 400W on Z.

Having only used steppers until this job, i was not expecting them to be as good as they were as the Nm figures do not compare with steppers at all. I used a CSMIO IP-A with 10-0-10v control.

The issues i had/have are all tuning related really - the manual i was sent by the guy was in strong Chinglish so not really much use to a beginner like me. To get a really good tune i am convinced i need to alter the parameters in the drives but cannot do this.

The tuning in CS Labs plugin is all i have so worked with that. It is a time consuming process, forget the auto-tune ;) Apart from a slight resonance on the Z drive I have it running really well now, very little following error and good acceleration, top speed is pretty low at 2500mm/min but this is only an old Bridgeport so no point in flogging her to death. Acceleration was more important to stop corner-rounding in Mach 3's trajectory planner.

I must admit that i had the 400W on the bench to play with and even running at maybe 5 rpm i could not stop the shaft rotating no matter how hard i grabbed it, the torque is phenomenal and start / stops at speed are sharp enough to make the motor jump off the bench!

I could probably have fitted smaller motors on the mill, they have 2:1 reduction drives but this size seemed a good price :) I think they were about £400 for 700W with drive and 5m cables.

I would love to fit them to the plasma cutter, may do one day.