Ikier K1 (possibly Atezr L2) absolute coord working with Z Autofocus?

[cggorman (Chris)]

Next step was to check/adjust stepper settings…

Jumping from here to keep my K1 journey somewhat collected:

@dkj4linux

I like to rubber-band a wooden skewer (or other pointed object) to my tool mount, lay a ruler on the work surface in line with the axis, and lower the skewer point to a point as close as possible (without touching) above a major division on the ruler. Then enter a gcode command from the console to move a safe amount (start small… say 50mm, 100mm, etc) and observe where the skewer tip moves relative to the ruler’s scale.

Using a metric tape measure I previously verified against a calibrated 2 meter steel rule I have at work.

I thought I might be able to use my crosshair positioning laser but it was impossible (for me and my eyes anyway) to resolve a sub-mm positional change, so I used a skewer as suggested above. Thanks for that.

Bed size is 410x750.
My Y axis was off by about 1 mm at 750.
My X axis was off by about 0.5mm at 410.

I didn’t save the initial values, but I believe Y was about 751 and X was about 409.5

Not too bad, but plenty of room for improvement.

The Calibrate Axis tool is lovely. So much faster and easier than doing the math and entering the correction long hand.

I cycled both axes a dozen times after calibration and they’re spot on now. At least, as close as I can get it with the measuring equipment I have. I can tolerate <0.25mm error, which is about as precise as I can measure over these distances.