Calibration issues with different materials

So, I calibrated the M1 with a 2x4 piece of wood, and it measured accurately. However, when i tried to cut a piece of 2020 T-Slot aluminum, it doesnt accurately measure the cut. Its not consistent when it measures. Possibly because the aluminum is not as tall as the 2x4 and the measuring wheel is turning differently than when I calibrated with wood. I wanted to try to calibrate with the aluminum piece, but unfortunately it only comes in 59 inch pieces and not 72. I wonder if you couod change the firmware so that we can calibrate different materials at variable lengths. Like maybe 4,5,or 6 feet.

If the M1 shouldnt have a problem with using multiple materials with only 1 calibration, then my unit might be broken then. Please advise either way.

Thanks.

Hello! The M1 Does have calibrations that are specific to various kinds of materials and is expected behavior based on the fundamental principle of how the M1 Measures.

As the wheel is rubber and needs to maintain the balance of traction (not slipping) while also not wearing, it will deform slightly differently whether measuring a piece of aluminum (smooth, flat, non-porus) vs a piece of wood (grainy, coarser surface).

On the opposite end, a full metal wheel would never change shape but also would have issues measuring smoother pieces of material resulting in accuracy errors from slippage

So, will you make it so that I can calibrate to different material lengths? Because right now it only will work with wood pieces.

You can calibrate with any material, for example if you were cutting aluminum with it you could perform the calibration process with a piece of aluminum instead of wood

I cant because the calibration only works with 6 feet of material. My aluminum pieces only measure 59 inches, not 72. How can I change this to calibrate a shorter material distance?

The calibration cant be changed so you would need to get a longer piece of aluminum in this case to complete the calibration with