Since I finished the lowrider, I can not succeed cutting practically nothing. I blamed the bits, the resin of the woods, my little experience milling, etc. Today while I was still trying to cut a piece I realized that when the Y axis began to lose steps it was always in the same place, in a cut with Y going up while the X axis was going to the left. I’m running the same program again, but this time I’m empty, I went back trying to stop the bit shaft and I can do it, but doing enough strength. I still do not understand anything, the CNC has a lot of strength, the bit is new, it is sharp, the speed and the rpm are correct. While I continue to hold the path of the bit with some pressure, the Y axis starts to lose steps when it is directed upwards, making on it a very little force (I do not think more than 1 kilogram). while when the bit is going down I have to do a lot of force to make it lose steps, maybe about 7 kilograms.
I stop the program and move the axis using the display, then I confirm that by increasing the Y axis (+Y) I can very easily brake the stepper, but lowering (-Y) it makes a lot of force.
If I move the shaft by pushing it with my hand, there is no difference between taking it to one side or the other. the same as if I turn the stepper with my hand.
Does someone know why this is happening? The X axis does the same force in both directions. The Z axis is difficult to know because of the weight of the pipes.