After the construction, I am using Winston’s GC to cut out holes for T-Nuts - you will notice that on the second hole, the machine starts to lose the Z-Axis orientation.At 00:24s you will hear sound as if cutter is hitting something, but the cutter does not cut through the MDF and hit the plates below. This causes it lose the orientation. Any thoughts?
I was having the same issue. Seems that the tension on the Z axis drive belt was too loose. Once I corrected that problem, I haven’t had any more issues. Just a thought.
I had the same thing happen, it was the belt tension. Easy way to tell is if you take the bit out (leave the router powered off) and use the jog command on the Z axis, it will ‘pop’ up after the spring tension overcomes the belt tension if it is too loose.
Thanks for the quick response. I was away. But now I am back, and I able to do as suggested. The all the axis are locked including Z-Axis when the power is on.
When the belt skips (what happens when the Z-Axis hits the board) then that Z axis value will no longer be accurate. It’s open-loop control, the controller only knows that it told the stepper to move the axis, so it now believes the axis has moved. It does not know that it did not move.
It does sound like that is what is happening in you first video; could upload the gcode used? It could be that one hole is set to cut deeper and the bit hits the metal strap.
From the video this is what i see: the Stepper motor has no where to go, so its slipping.
The position is changing in Carbide Motion because its counting the pulses.
I don’t know if you do need to tighten the belt.
Are you at the bottom of the travel?
If your trying to machine holes into the wasteboard, turn the router on. Even with the tightest belt, if you plunge into a surface with the router off, its going to skip at the Stepper motor.
Maybe you are right that I am at the end of the Z travel. I can verify it tomorrow when i go back to the studio.
As this project was built with an assumption that the router is DeWalt. @wmoy did post something the other day about Makita routers being short on Z travel by as much as 1/2".
Alright, so raised the base by an inch so that the Z travel never passes the midpoint. I also verified that the cutter is in the collet at 3/4". Still the same issue - within few passes Z-axis had lost 5-6mm.
your z belt is loose. tighten it up, I’m not sure if you have the adjuster screw but my z belt is TIGHT. Your motor should not be slipping that easy against the waste board. G/lRay
Silly question, but have you checked the set screws on the pulley. That was giving me some trouble.
When I first set it up, I didn’t use the threadlock (because I found myself taking things apart and re-assembling). Those set screws loosen easily without the threadlock and can slip just enough to mess you up.