Back after a long time... 2 questions

Troubleshooting
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1

Hey community - have found myself with some time and I got maslow 4.1 upgrade installed.

Been working through what seems like typical calibration growing pains. Doing many calibrations and my skew has gotten better. Now at about 3/16 in small horizontal and 1/16 in big vertical on a 6 in square.

At what point do you look at consistency and just adjust the scale by 2% to dial it in?

Finally starting to run really big (>1000 mm×500mm) calibration grids today -

Last calibration was fitness 0.99749 - has been >2 on smaller grids.

My guess at a measure is ~ 93.75 in so 2381.25 mm by 138.875 in so 3527.42 mm The diagonals measured within 1/4 in.

Most recent calibration:

tlX:-1, tlY:2403.3

trX: 3510.7, trY: 2401.8

brX: 3503.1, brY: 0

I am noticing 2 arms don’t pull as tight with the same calibration limit of 1000 current - I was running at 800 current with significant sag. Is there a way to monitor motor current?

Also looking for a good way to zero the bit- hard to see, so I’ve been lowering until interference on scrap.

Thanks!

2

Finally starting to run really big (>1000×500) calibration grids today -

Last calibration was fitness 0.99749 - has been >2 on smaller grids.

fitness is turning out to be a poor estimate of accuracy. If you have few points
on a small grid, you will get good fitness because you don’t have enough of a
baseline to notice errors

My guess at a measure is ~ 93.75 in so 238.25 by 138.875 so 3527.42 The diagonals measured within 1/4 inch.

providign units here may make this make sense.

Most recent calibration:

tlX:-1, tlY:2403.3

trX: 3510.7, trY: 2401.8

brX: 3503.1, brY: 0

take a look at https://lang.hm/maslow/maslow4_frame.html and go for the biggest
grid that will stay in the green and not go so close to the edge that you will
fall off your material

also go for more points (especially as you go to a larger area)

I am noticing 2 arms don’t pull as tight with the same calibration limit of 1000 - I was running at 800 with significant sag. Is there a way to monitor motor current?

there is a setting in the maslow.yaml (configured via the UI) that enabled a
debug screen that shows motor currents.

Also looking for a good way to zero the bit- hard to see, so I’ve been lowering until interference on scrap.

David Lang

3

Thanks David - updating units. Im running 9x9 - the highest setting for calibration in the menu - has anyone tried using a higher number in the yaml?

Calibration is pretty close, it moves a few mm each calibration. I didn’t consider bolt head radius into my calcs so +/- a few cm is likely.

A note, the site you linked doesn’t agree with my browsers.

4

Gabe Merrill wrote:

Thanks David - updating units. Im running 9x9 - the highest setting for
calibration in the menu - has anyone tried using a higher number in the yaml?

9x9 is the most dense grid currently supported

Calibration is pretty close, it moves a few mm each calibration. I didn’t consider bolt head radius into my calcs so +/- a few cm is likely.

the key question is how well it works. When you move around, do the belts stay
tight?

If you are having problems, check that the Z offsets (including spoilboard and
workpiece thickness) are correct.

A note, the site you linked doesn¢t agree with my browsers.

try http, not https (I dislike the browser auto-‘upgrade’ and hadn’t noticed
that it had done so)

David Lang