I am having some issues with my latest trial cuts. I am cutting .75" MDF. I have a 3D Model in Vectric Aspire that is .6" deep on the Z axis.
When I was cutting earlier, everything was going fantastic until I got towards the end. It got to the point where it was cutting through the .75" thick MDF! I had my bit placed right on the top of the board when I started, universal G code sender showed I was zeroed on the “workspace” and “machine”.
I don’t understand what I’m doing incorrectly. I am very new to this!
It seems that the Z axis is losing its position either through mechanical slipping or missed step pulses to the stepper motor, or you may have a Z axis calibration problem.
Check the following items on the Z axis -
The pulley set screws on the motor and vertical motion screw (either M8 or ACME).
The adjustment of the V wheels (may be too tight)
The tension on the Z axis belt
You may have to adjust the current limit for the Z axis.
Thanks for all of the replies! I just now was able to get on and check them. I was actually able to fix my problem by finding another post on the forums with UGCS settings (pulled up by typing in “$$”). I just happened to look through them line by line and saw that my $102 (I believe) was not the same. Essentially, it appeared that the number of mm’s my machine was counting per step was too high. I lowered it to what the forum user posted and it works fine now!
To check this theory, I used UGCS to move the Z axis from on the board to 1 inch up. I measured the movement physically and it was close to 1.3 inches. After adjustment a 1 inch movement in UGCS yielded a 1 inch physical movement.