No matter what I do I can’t get it to cut down to 12mm as I have set it in estlcam. Obviously the problem is me, not the software. I have set it to 2mm per pass at 12mm total. It does 6 passes but total depth is probably .2mm. Please help. Pleeeeaaassssee!!!
See favebook for video as file is too big for here.
Try driving each axis separately without cutting anything and measure the moves to see if everything seems right with the hardware/firmware setup. This should rule out hardware and point to CAM if everything moves correctly. If not:
Did you flash the correct firmware for your Z axis screw? (5/16 allthread vs. T8 leadscrew)
Is the screw coupler loose allowing the stepper to spin but not the screw when under load?
Is the stepper skipping? Seems like you were using some out of the ordinary driver boards, what stepping rate are they capable of with the ramps board driving them?
Ryan I am using the ramps board with external stepper drivers @ 1/16 steps. Firmware MPCNC813_GLCD_T8. Allthread T8, not sure of the pitch but it’s fine thread.
I’m pretty sure I got it sorted now. I increased Z steps to 2600 and seems spot on. After I cut through a 12mm MDF, it only just made a mark on the spoilboard underneath. I still have to face the spoilboard to get it level but that’s for another day
Thanks for your reply also Mike. I’m using a T8 allthread and my stepper drivers can go down to 1/16.
Everything seems pretty solid and as I mentioned it all works now. hopefully I’ll try 4mm aluminium on the weekend. What feed and plunge rates would you recommend? I’m thinking of using the same 3mm single flute endmill, otherwise I have a 4 and 6mm 4 flute that I can use if that might be better???
Oh OK. Maybe I got a different version, modified, not sure. but I couldn’t get my Z to go bellow 0 unless I disabled the MIN software endstops.
Come to think of it, (I will check this today) but if I turn off the machine while my axis are in the middle for example, after I power on, I cannot move them back to the start because they are at 0. I have to turn the machine off, manually move them back, then turn the machine back on. Even selecting "Disable steppers"from the LCD doesn’t disable them, so I can’t even move them back while the machine is still on.