See photos above. I am having some issues with my build, They seem to be getting worse as I try and sure up the alignment. I’ved redone the fixture setup with a t-track and multiple hold downs ensuring that the piece isn’t moving. I’ve made sure the legs are level and square and tightened the drive belts.
I do notice that the router holder is a little loose on the pipe as if it could use a shim or something.
Any sort of help or suggestions would be greatly appreciated.
When the machine wanders like that, one of the most likely culprits are the little grub screws on the motor pulleys. Really, check them.
Sounds like you have some other issues. All of the bearings should be in contact with steel, and there are adjustments where the machine can be tightened. Before you go to town on the bolts though, be sure that you’re using hte right size steel for the plastic parts that you printed. “C” parts are for use with 3/4" conduit, 23.5mm in outside diameter. “F” parts are for 25mm OD tubing, and “J” parts are for 1" (25.4mm) OD tubing. If your tubing is the wrong size, then things get pretty wonky.
I’m not as familiar with making the adjustments on the older MPCNC like you have. I’ve only worked with the Primo.
Thanks for the reply!
I have been slowly coming to the same conclusion, but I am not confident in the sizing. A friend of mine printed the parts, how can I check which model part he printed? There are some visible gaps between the bearings and metal pipe though I am utilizing 25.4mm, 1in 304 ss tubing. I would have thought that the other components would have been too tight if misprinted.
Regards,
Brandon
The 1" sizing is the largest.
Each part should have a letter code on it somewhere. As I stated above, You’re looking for a “J” marked on the parts.
Aside from that, calipers and checking the original .STL models.
Many of the parts should still have a bit of a gap betweent he plastic parts when they’re clamped down on the tubes. Those gaps are meant to be there, and you should not gorilla down on the bolts to close them.
Hey Dan,
Thanks for all of the help. I wanted to reply and let you know that I confirmed the part sizes and verified with calipers. It is all built correctly to the specification. The issue I was having was indeed loose/missing set screws on the gears mounted to the motors. I was unable to find that size screw so I ordered new gears and finally got the time to replace.
Everything appears to be working well and as intended for wood engraving.
I appreciate the guidance!
