Accuracy and tuning

Troubleshooting
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1

Really enjoying my Maslow 4.1. Getting very consistent results and have made a few project. I think I may possibly have an encoder that isn’t quite working correctly. My cuts seem to be off by about 1mm and I am consistently seeing my bottom left encoder coming up short. Msg below. Is this possibly affecting my accuracy? Is there anything I can do to improve that without taking belt assemblies off the router?

[MSG:INFO: Bottom Right pulled tight with offset 0.054]
[MSG:INFO: Top Right pulled tight with offset -0.204]
[MSG:INFO: Bottom Left pulled tight with offset -1.331]
[MSG:INFO: Top Left pulled tight with offset 0.000]

[MSG:INFO: Bottom Right pulled tight with offset 0.011]
[MSG:INFO: Bottom Left pulled tight with offset -1.836]
[MSG:INFO: Top Right pulled tight with offset 0.064]
[MSG:INFO: Top Left pulled tight with offset 0.000]

2

Brian Hunt wrote:

Really enjoying my Maslow 4.1. Getting very consistent results and have made a
few project. I think I may possibly have an encoder that isn¢t quite working
correctly. My cuts seem to be off by about 1mm and I am consistently seeing my
bottom left encoder coming up short. Msg below. Is this possibly affecting my
accuracy? Is there anything I can do to improve that without taking belt
assemblies off the router?

you can increase the retraction and calibration current limits. but that will
pull tighter on the other arms that don’t need it.

the right answer really is to take the arms apart and make sure the spools turn
freely on both halves of the arm. It really is a pain to do, but it’s the right
answer.

David Lang

3

I am at 2000/1500 I don’t want to go up much more. I was holding off pulling them apart until after this project but I guess I will do that tomorrow and sand/lube them all down as well. See if I can get below 1000.

I am just glad it is spool issue and not an encoder/motor issue. I had plans to do this fix but was putting it off because of the pain of disassembly.

4

This is most likely the magnet slipping in the roller. Basically the encoder is measuring the position of the magnet, but if the magnet slips relative to the roller then it will give you a difference like that.

I’d check that that magnet is fully glued in place

5

When the arm stops, is it not quite tight? or is it as tight as the others.

If it’s as tight as the others, it’s probably friction, if it isn’t, it’s
probably the magnet

but since you have to take things apart to get at them anyway, you may as well
work to make the arms move easily while it’s apart.

David Lang

6

It was both the belt was loose compared to the other three. When I took it apart the magnet was stuck to the encoder chip and not the gear.

Got everything moving a lot more freely now just waiting for glue to fully cure.

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