Carving is bigger

[JulienDube]

Hi!

New to easel. I have an Openbuilds Leed + Blackbox.

The carving is bigger that what I ask Easel to do.

I set my material to desire size (16 x 7 inches) and design my carving inside of it. I “HOME” the machine to the left bottom corner. I put a mesuring tape under my router and JOG 1 inch. The result is 1.25 inch. So it seem to be 25% bigger.

Is there a setting I enter wrong?

Thanks!

[MartinW.Mcclary]

You need to calibrate the grbl settings. This is the steps per mm found in $100, $101, and $102.

I would ask you to read this thread as I answered it there and how to make the changes. I had to do it myself to achieve better accuracy.

Calibrating my X-carve 1000

The calibrations for accuracy are basically zeroing in on the steps per mm for the axes. Your machine has to be mechanically adjusted first, which you have done. It’s just a ratio of two numbers. What you want/ what you get. You multiply that by the number in the $100 and $101 for the x and y axis. For instance if you want x to go 10mm and it goes only 9mm, then 10 / 9=1.111 and you’d multiply that by the number you now have set for $100. It requires an accurate measuring device and yo…

[HaldorLonningdal]

You need to recalculate GRBL parameters $100 (X) and $101 (Y) and possibly $102 (Z) aswell.

To list your current parameters open Easel Machine Inspector and in the Console window type $$ and press Enter. A list will appear showing each parameter ($0-$134)

If your current $100 and $101 value for instance is “100” this mean that your X/Y stepper must do 100 steps to move 1mm. But you get 1.25mm for 100steps.

Math is:
Step per mm divided by actual distance * commanded distance
100 / 1,25 x 1 = 80

To change the GRBL value type in Console $100=80 and press Enter
Do the same for Y, $101=80
Reset controller.

Test actual travel vs commanded travel. Once settled you can fine-tune this value if required.

[JulienDube]

Thanks guys. My CNC is now super accurate!

5 minutes job!!