Potential Acroloc Conversion (Comments Appreciated)

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cncsnw
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Re: Potential Acroloc Conversion (Comments Appreciated)

Post by cncsnw »

Correct, I have not.

Wiring diagrams and/or drive manuals would be essential.
TD-4242
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Re: Potential Acroloc Conversion (Comments Appreciated)

Post by TD-4242 »

This is the closest thing to documentation I've been albe to find so far:

https://github.com/TD-4242/Yasnac-MX1-D ... s_3559.pdf

I know so little about server controllers and motors that I don't know if it's useful or not.
cncsnw
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Re: Potential Acroloc Conversion (Comments Appreciated)

Post by cncsnw »

That manual suggests that the enable, velocity reference, and fault signals are all compatible with Oak signal levels.

This would be a fairly ambitious project. If you have not done something like this before, you are probably going to need to hire help from someone who has.
TD-4242
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Re: Potential Acroloc Conversion (Comments Appreciated)

Post by TD-4242 »

Been slowly grabbing parts for this conversion.

One really odd thing about Acrolocs, the head only manually moves up and down while the Z axis is an integrated bridgeport style quill that is what the Z axis servo drives.

I'm curious if it is possible to put a scale on the manual axis and have it feed the centroid software to automatically compensate the Z axis?

This would be similar to a knee mill conversion where you CNC the quill but then change the knee by hand and the Z axis updates appropriately.
cncsnw
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Re: Potential Acroloc Conversion (Comments Appreciated)

Post by cncsnw »

You can certainly put a linear scale on the head travel, and feed that into an additional encoder port on the control.

That would at least give you on-screen display of the head position. There are "summing" features in the software which might eventually be useful for combining the scale with the Z position, but Centroid probably still has some work to do on them.
TD-4242
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Re: Potential Acroloc Conversion (Comments Appreciated)

Post by TD-4242 »

In discussions with someone else about it I knew we could feed a scale back into the head but at first didn't think that'd be as useful.

On deeper consideration I did realize that at the very least I could manually adjust Z based on the scales readout. Not 100% convenient but completely doable.
TD-4242
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Re: Potential Acroloc Conversion (Comments Appreciated)

Post by TD-4242 »

Still waiting on some parts to continue moving forward.

Racking my google skills over finding a way to get 113vdc to run these Hicup servos. I need about 80v AC to rectify but haven't been able to find a transformer that gets me close to that, plus I'm pretty sure I need to have something that will cover 3x the 6.5A (for each motor axis) I'm also not really sure how to calculate in the INST line.

Anybody have any ideas or hints on where I should be looking, or different approach I should be looking at?
(avoiding scrapping these motors if possible)
Attachments
Motor Zaxis servo.jpg
cncsnw
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Re: Potential Acroloc Conversion (Comments Appreciated)

Post by cncsnw »

Either of the Centroid transformer-based servo power supplies (pn10010 or pn10537) would give you around 120VDC, which is probably close enough.

Either one should have sufficient current capacity to run three of those motors.
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Re: Potential Acroloc Conversion (Comments Appreciated)

Post by martyscncgarage »

Are you having trouble using the DC power supply I loaned you Bill?
Keep in mind, you just don't want to go much over the label voltage. No problem going under a little bit either.
Have you found the power supply bin your machine?

Marty
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We can't "SEE" what you see...
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TD-4242
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Re: Potential Acroloc Conversion (Comments Appreciated)

Post by TD-4242 »

The DC power supply is working fine but figured I'd give that back to you and not install it in the cabinet.

But seriously it's a bit odd. I've spent a lot of time in the cabinet and poring over Yaskawa documentation trying to figure it all out. The servo packs are rated at 200vdc output at 25amps and meant to be paired with these specific Hicup motors, which seems like a bit more than a little bit over 113vdc.

Which is where I think that Instantaneous rating comes into play.
but the motor label and docs don't mention anything about voltage levels for that.

From the Docs:
image.png
image (1).png
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