How we should measure distances accurately.
On the right to right of the cut,
This approach is the best. Since errors of a fraction of a mm make a difference
here, trying to estimate the center of a cut/mark doesn’t work, and right to
left require you to know the exact bit size.
All my measurements were made with laser and a block of wood located in the center of the mark.
what’s the claimed accuracy of the laser?
David Lang
Bosch GLM80
Attributes
Accuracy ±1/16" (1.5 mm)
Laser Diode Class II 630 - 670 nm
Leveling Accuracy (Vial) +/- 0.2°
Measuring Accuracy Typ. +/-1/16-in (1.5 mm)
Range 2-in. (50 mm) to 265-ft. (80 m)
you would be better off with a metric tape measure, with it you can get an accuracy of around 1/2 mm
the accuracy benchmark was made with the squares just under 6" so that you could use the $10 digital calipers from Harbor Freight (or similar), but for the calibration, we need to measure longer distances, so you would want to use a metric tape measure and make your best effort at sub mm accuracy (you should easily be able to get 1/2mm, and if you are careful, you should be able to get to 1/4mm)
±1.5mm is bad enough to throw off the calibration results.
Wow, 1,5 mm accuracy, that’s good if you’re measuring a room, but totally useless here. The cheapest callipers get 0, 1 mm accuracy if you know how to use them.
Seems like there you have a tool that gives you high resolution to fake high accuracy. I hate when they do that.
Edit. ±1,5mm that’s 3mm of inaccuracy
Auto Zero Z Works fine with aluminium tape
Two Crocodile clamps.
You need to define a macro like this.
And ready to go.
The Maslow logo after first calibration.
The results after second calibration.
For the AEG router drills I’ve used this PDF in page 19, I’ve used this page on CAD (PDF to CAD)
AEG - TEMPLATE.pdf (432.4 KB)
Ridgid should be the same but I can’t probe it.
ENG: Nice job! I’ve just built my Maslow here in Tenerife. Hope to get similar accuracy in the future 
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ESP: Gran trabajo! Acabo de montar mi Maslow aquí en Tenerife. Espero poder llegar a una precisión similar en el futuro .
Thanks for sharing DXF file! Is that PMMA (aka Acrylic) 1/8 inch or 1/4 inch thickness? And if you have the pre-configured g code to also share, many would love to see you submit everything in the Maslow Community Garden 
This sled is PMMA 8 mm thickness.
I’ve the gcode, but for this thickness (8mm),
I consider more usefull DXF files than gcodes, with this kind of files you can use it in CAM softwares.
Thanks
