Got me some 3.175 upcut bits. First run was great - but my machine is completely erratic. This is driving me NUTS!
First, I can’t trust my Z-stepper motors. My spoilboard levelling was an eye-opener. After checking that both ends of the Y-axis were perfect (ie same height) I ran the levelling cut. By the end of the cut, the far end of the tubes as a full 4mm lower than the near end. I tried it again, same result. So I wedged equal height spacers under both XY plates, and ran it again. Voila! Next run (now I had to remove the twist in the table) I used the adjustment on the Makita router itself to drop the spindle 1mm. I had to do this four times to get the bed flat.
With a flat spoilboard, I decided to cut myself two new Y-plates out of 18mm ply (mine are slightly warped). Everything was set up as perfectly as I could get it. Estlcam instructed that the DOC was to be 3mm. 3mm upcut bit. 10k rpm. Feedrate = 8mm/sec. I don’t have a touch plate, so I used the 3D printer trick of sliding a piece of paper under the spindle till I felt the drag of the bit. I then zero’d all axes, and hit print!
The router immediately began ploughing a 10mm deep cut. WTF? I verified that the gcode stipulated Z-3. Those bloody Z-steppers!
I’ve already placed an order for two 92in/lbs Nema17’s, and two closed loop circuits. https://www.aliexpress.com/item/4000580356407.html?src=google&albch=shopping&acnt=494-037-6276&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&&albagn=888888&albcp=9437580887&albag=98363632680&trgt=296904914040&crea=en4000580356407&netw=u&device=c&albpg=296904914040&albpd=en4000580356407&gclid=CjwKCAjw4_H6BRALEiwAvgfzq0rfxFayeQ1SOhpQdyme7Tgw0mu9eLyRPfo3EXoVp3VqzFruMpG5jBoCRMMQAvD_BwE&gclsrc=aw.ds
I’m sitting here at the laptop, having given up for the day, and scratching my head. I don’t know where to go from here. The plywood sheets for the plane cost $330 each. I can’t afford to waste that sort of money because my machine has a mind of its own!
Anyone have any idea what i can check?