Re: [CAD_CAM_EDM_DRO] frozen motor

Hi Peter,

Assuming that orange and yellow are the center taps (you've carefully
metered out the leads to determine the windings and the centers), you've
got the connections correct. Swapping a winding pair should only give
you the reverse direction, the motor should still run!

The winding resistance's are similar? Nothing weird (suggesting a short
between windings)? Then on to the driver! The "motor cable". You are
using a Gecko G201/210? Where do the cable connections go? Hopefully,
you haven't inadvertently swapped an 'A' for a 'B'. That's about all
that's left. Cable buzzes out OK? Hope you don't have a fried driver!
Do you have another motor to try? I'd be careful about "testing" the
motor on ANOTHER driver, as a shorted motor winding could endanger the
driver.

If you have a current probe, I'd try making slow steps, and watching the
current "spikes" (you won't get levels, as the driver chops), this might
suggest a bad winding, or, a bad driver (ouch).

Another possible test is to use a current limited power supply, set the
limit to match the motor's spec (or somewhat lower), and observe the
holding torque created for each winding (connect P.S. to winding
directly).

HTH

Alan KM6VV



cncnut@... wrote:

>
> Hi,
>
> The Shinano Kenshi motor has 6 wires –
> BRown – BLack (center tap) – Orange on one winding,
> Red – White (center tap) – Yellow on the second winding
>
> The motor cable has 4 wires – with blue and black connected to AA~ on
> the motor driver, and white and red connected to BB~. The motor was
> fixed to the x-axis of the Sherline mill.
>
> So for half winding the wires are connected as follows:
>
> MOTOR DRIVER
> BRown-------blue A
> BLack -------black A~
> Orange
>
> Red-----------red B
> White---------white B~
> Yelow
>
> With the federate set to a low value to avoid lost step, attempts to
> move the x-axis was met with just rattling (clicking) sound from the
> handwheels, with no movement/rotation. The wires were switched
>
> MOTOR DRIVER
> BRown-------black
> Black --------blue
> Orange
>
> Red-----------red
> White---------white
> Yelow
>
> Same result. What is wrong?
>
> Peter