On 05/19/2018 08:58 PM, Dan Bloomquist wrote:
My son is looking at CNC mills. I cam across this one, and
no, I don't think it suitable for him. He will really need
a Haas class machine.
But I'm looking at the photos and I don't see any 'glass',
feedback, like my mill. How does it work? I know those
have to be servos, not steppers. Do they just encode on
the drive shaft and consider that accurate enough?
<https://www.ebay.com/itm/LAGUN-FTV-1-VERTICAL-CNC-KNEE-MILL-w-BANDIT-Control-42-x9-Table-Tool-Holders/173275239732>
That's an Anilam bandit (I) control, and I'm pretty sure the
motors are STEPPER, not servo.
Precision is established by the leadscrew. Many, many
machines use either steppers with no feedback, or shaft
encoders on the servo motor.
Jon
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