Anilam 1100M Servo Bearings

No, I didn't disconnect any wires during the disassembly. I took the tacho off and cleaned the commutator but have not tried it yet.

Edit: I might have damaged the windings on the tacho commutator when I pulled it off...

JT

Yep, I screwed up pulling the tacho winding off like I did. Looking with the microscope I've damaged some wires...

JT

if you have a spare analog output channel you may be able to
Simulate the tachometer

(you may have to adjust the tachometer input gain on the drive)

I think I found a servo rebuild place that may have one... I'm hoping.

If that falls through are you talking about using one of the analog outs from the 7i77?

JT

Yes, by feeding the encoder velocity signal into an analog output, you can
simulate a tachometer (voltage proportional to velocity)

The drive may need adjustment because the 7I77 output is limited
to +-10V and sometimes tachometers output more than 10V at full speed.
The drive should have a tachometer gain control to adjust for this.

BigJohnT wrote: Yep, I screwed up pulling the tacho winding off like I did. Looking with the microscope I've damaged some wires

Nothing to lose by trying a repair, if it is just a broken wire.

Yep, I screwed up pulling the tacho winding off like I did. Looking with the microscope I've damaged some wires...

That sucks. Sorry to hear that. Reminds me of when I tried pulling the encoder off the anilam Z drive. Cracked the glass encoder wheel.

andypugh wrote:

BigJohnT wrote: Yep, I screwed up pulling the tacho winding off like I did. Looking with the microscope I've damaged some wires

Nothing to lose by trying a repair, if it is just a broken wire.

Epoxy encapsulated and multiple tiny wires are broken... pretty much impossible to repair with normal tools and hands.

JT

I found a tacho for $480! then I found a complete servo for $200, should be here tomorrow... I did try a few times to use encoder velocity out to the driver board but didn't have any success, I think the tacho put out a lot more than 10vdc but not sure. I saw what I thought might be an adjustment but was a bit nervous to turn it as it might break too.

JT

BigJohnT wrote: I think the tacho put out a lot more than 10vdc but not sure.

The lowest i saw was 9V/1K RPM while the highest was 22V/1K RPM