Got my little 3040 cnc from china.
The stepper motors (3) are 57STH76-2804B
The spindle is 800w water cooled 24000rpm at 400Hz
It has limit switches on all axis.
The good:
Seems pretty solid and the electronics look good.
Has been working flawlessly for the past week after some teething troubles.
The Bad:
All the software that came with it is pirate.
I have purchased Artcam Express and Mach3.
The ugly:
The pump ports (2) on the back of the control box have male pins with 240v on them.
Perfect surprise for someone. These will be changed.
Initial Problems:
Very intermittent X axis. Located a defective Stepper motor lead plug. Replaced it.
Limit switch locked on. Located faulty (crushed) micro switch. Replaced it.
The control is via USB and I was having a number of sudden stops.
The old laptop I was using had a bad USB port.
After testing without a bit in it, I decided to put it to work.
Attachment 346780
It took 4 hours non stop.
270mm dia
Still have to do the final cut out circle.