Hey! I have been scratching my head last night as I encounter this problem. I took a break from project for 2 weeks and when I came back this is what greeted me.
I usually cut my 3mm with 2 passes (air assist) but today I noticed that the 2nd pass doesnt exactly match the 1 pass path. Took off all the belts and cleaned, retightened the y axis rod, and did some test using diagonal lines and circles but this was the result. I dont know what to clean and recheck at this point
Sorry i just got home from work. Retightened some nuts, tested your file and this is the result. Some wavy lines, some lines dont intersect with the circle as well.
the wavy lines are a fight against physics, hard to fight those
2 thins you might notice on the test
a) your Y belts are slightly loose, do tighten them a bit more and make sure your frame is square
b) when you hold your module, and apply rotation. (Up/down, back/forward) do you feel any slack betweenm the wheels and the X frame. Is possible your eccentric nuts need some tightening too
Yes, I believe that’s what John is referring to. When I first got my machine, I had similar symptoms. The coupler was tight on the motor shaft (right) but not on the connecting rod (left). Once I made sure that they were both really snug that took care of “my” issue. YMMV.
Yep, it looks from.the picture like that side is smooth at least… put power to the machine so the steppers lock up and see if you can just twirl the pulley with the belt attached to it without anybresistance… also, grab the long smooth rod in one hand and the coupling in the other and try to spin the long rod…if the rod spins but the coupling stays thats slippage and the main problem.
