I’m still having problems with this…
BLUF: When the z-axis motor tries to raise the bit, it looks like the height adjustment screw doesn’t always catch on the depth interlock lever. This sometimes happens lowering the but, but much more often when raising. With a bungee applying pressure to eliminate slop, it will actually LOWER the bit when the motor is trying to raise it.
I got side tracked with other things going on, so I didn’t get to mess with this anymore until today. I went ahead and put some lubricant on the motor housing and inside the base, threw a bungee over the router, and did my test cut, and it did OK. I noticed that where I had it just engrave a circle, by the time it got all the way around the depth had increased a little bit. The circles I cut were a bit oblong too, so I figured I’d redo the calibration cuts. This time, after doing the first cut, when it tried to raise the bit it actually lowered. I stopped the cut, and sent to the home position, but the bit was still well below cutting level, so I had to hold the sled up until it got into position. I took the sled off, and used ground control to command the z-axis up and down, and it was really inconsistent. Sometimes it didn’t do anything, then it would work OK for one or two moves, then stop again. I noticed that when it wasn’t moving, the height adjustment screw appeared to be just spinning in the depth interlock lever. At one point when raising the bit, it actually started slipping in the opposite direction, apparently be pulled down by the bungee. So I took the bungee back off, and it’s still being terribly inconsistent. With the lock lever released, it lowers consistently, but every other adjustment or configuration is a total crapshoot. Sometimes to get it to raise I have to physically pull up on the motor housing before the screw “catches.” Anyone see any behavior like this before? Something to do with how tight I’ve got the base? Did I somehow strip the depth interlock lever?
Any ideas would be appreciated.
Thanks in advance!