Our posts crossed.
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At least the proton packs did not explode creating a black hole… 
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do we know if this is actual ?
See the article, below, where Glowforge attached a spreadsheet full of calculations.
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are the orginal units in inches or arbitrary ?
I’m unsure. I believe they’re inches. No way for me to empirically test that, though (no Glowforge).
I don’t think that’s the secret sauce because its linier
and from what I have seen the slow down is exponential
this is based on the formula
So all that formula does, is take the first set of A and B as old min/max, and the second row of A and B as the new min/max, and makes a linear conversion between them. So 4 goes to 100 and 157 to 500. The first set is presumably the min/max limits in IPM that are “reasonable” for cut/engrave, and that is mapped to a 100-500 or 1000 scale. The engrave max speed is approximately 2x as fast as the cut speed limit, although not exactly, so that’s probably why they doubled the scale.
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Yeah I understand how it works, I just think it’s unnecessary and makes converting between other things that much more painful.
Not really sure if they wanted to make a nice big round number, or were trying to hide the fact max speed on a Glowforge is a lot slower. Could be both…
Either way, neither of those are really doing a service to the user. I’m hoping in future versions they will allow you to choose the units it displays.
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do we know what the actual speed is for max ?
1000 in fake units
335 in/min raster engrave
157 in/min vector cut/score
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Do we know the curve its easy to put 100-1000 on 0-157 linier but I swear the difference from 150 to 100 is ten times slower then 200 to 150
100 -> 4 ipm
150 -> 23.125 ipm
200 -> 42.25 ipm
So 150 is nearly six times faster than 100 but 200 is less than twice as fast as 150.
Wish we knew the formula. I’m trying to figure out a dwell time for every setting. So that for say I have it at x power and y speed i can say g delivered but I may want to run it faster so that means less dwell time so more powered needed to get the same delivered
We do know the formula. It is the simple linear transform you graphed. It is the fact it has an offset that makes it awkward for energy density calculations. But we don’t know how power is mapped so you can’t do that anyway.
If I ever get mine I will try to work out the power mapping and check the speed mapping is real.
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So I hard my graph based on the new speed formula and to get to 1000 it was a speed of 400 but that is way fast then the machine can actually do
It can do 1000 when engraving which is 335 ipm. It can only do 500 when cutting which is 157 ipm using a slightly different formula.
ipm = 4 + (cut_speed - 100) * 153 / 400
ipm = 4 + (engrave_speed - 100) * 331 / 900
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I am a dope … Thx for clearing my mud vision
I have not had the machine on a ina. Couple weeks kept thinking 1000