Is it possible to update the angle calculator thing to use color gradients rather than hard lines between the colors? I think that the small angle approximation is going to mean that it isn’t really much of an issue for several degrees of contact. At the moment I think that the largest source of error is probably belt/frame stretch as the tension changes in different locations across the sheet
Could it also have to do with the z heights, either the z height of the anchor points, or said differently: the thickness of the work piece. In relation to the z height used at calibration? And maybe a different possibility, could it be the different z height differences of the 4 arms playing a different role if the anchor z height (or work thickness) is off?
I do think you’re right though about the stretch in both the belts and the frame, even the walls of my shed creak with the tension the Maslow puts on it 
I might have to put braces in when I Maslow to keep the walls square. Though I am not sure that is the problem at the moment, I have the tension set at 1400, and I don’t think it warps the shed very much, but when every mm counts it might make the difference.
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I am not 100% sure it was caused by the degree limits and therefor bumping into the uprights and altering the triangulation calculations. I could have bumped into the belts while ducking under them…
The “bowing out” as you call it seems to be quite evenly distributed. The measurements drawing is within the green area and also within (actually equal to) the calibrated area. It looks to me like some sort of fish eye lens effect, or the opposite of it. That is why I thought it might come from some z height effect in the calculations, it might be like a surface stretched out in the middle like a tent with one pole, if that makes any sense. If it is not from my setup (frame or otherwise) but a generally occurring problem it might be solved by an algorithm compensating for the "fish-eye’ effect.
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Gijs wrote:
If it is not from my setup (frame or otherwise) but a generally occurring
problem it might be solved by an algorithm compensating for the "fish-eye’
effect.
Yes, one nice thing about the maslow has been that it’s always very repeatable,
so if we find predictable errors we can correct them
but 2mm side to side is only a 1mm error on a single line.
David Lang
Could it also have to do with the z heights, either the z height of the anchor points, or said differently: the thickness of the work piece. In relation to the z height used at calibration? And maybe a different possibility, could it be the different z height differences of the 4 arms playing a different role if the anchor z height (or work thickness) is off?
all possibilities
I do think you’re right though about the stretch in both the belts and the
frame, even the walls of my shed creak with the tension the Maslow puts on it
Though I am not sure that is the problem at the moment, I have the tension set
at 1400, and I don’t think it warps the shed very much, but when every mm
counts it might make the difference.
note that the tension limit while running is 4000, the 1400 limit you set is
only for retract-all and/or calibration
David Lang
Bar wrote:
Is it possible to update the angle calculator thing to use color gradients
rather than hard lines between the colors? I think that the small angle
approximation is going to mean that it isn’t really much of an issue for
several degrees of contact. At the moment I think that the largest source of
error is probably belt/frame stretch as the tension changes in different
locations across the sheet
it is possible to do gradients in svg
the question is how deep to shade things
David Lang
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Please try going deep into the red and white areas to see what happens there.
I would suggest putting a workpiece as close to a corner anchor as you can and
start making right-angle corner cuts starting in the green area and working out
towards the corner.
David Lang
Hello all,
I’m in the process of setting up my maslow and ended up in the same situation as @Gijs.
Thanks for this post to help me understand error: 82. I’d buy a t-shirt.
Now for my 5 cents: I’m running a Windows 10 machine, initially with Google Chrome, and got the error: 82.
I switched to MS Edge and the error is gone. So it might be a browser issue, maybe not OS related.
Best!
Christian
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