MPCNC gantry squaring aid
These parts should help squaring the middle assembly aka gantry of the MPCNC.
3D view: https://a360.co/2FIYKO1
Things you need additionally:
- 2x 130mm M6 threaded rod
- 2x 160mm M6 threaded rod
optional: 2x 150mm threaded rod for the third hole, but it might not fit through because of the position of your lock nuts or screw hats inside the XY part - you got to try on your own and see, if you really need it
- some M6 lock nuts
- optional: 2x butterfly nuts
Look at the pictures on how it is assembled, it is not too complicated.
XY parts - increase outside angle
The pictures show my setup. The outer angle between both XY parts (black) was a bit smaller than 270 degrees, that's why the butterfly nut is there on the inside to press the parts apart from each other => this increases the outside angle.
XY parts - decrease outside angle
If you need to make the angle smaller, you can simply put the butterfly nut on the outside of the XY part (see third photo, position of the single lock nut on the right) and pull from there. That should lower the angle.
In any case, you should tighten the rod that connects the upper and lower part to clamp the XY part firmly and secure the "pulling" rod in the upper part with lock nuts.
BUT BE CAREFUL AND DON'T OVERTIGHTEN EVERYTHING.
I think you might be able to completely destroy your gantry when trying to correct an angle that is simply too large to be corrected this way. Then go back and check your printer!!!
The position of the parts in the STL file seems to be the most reasonable to get strong parts regarding the direction of the pulling force.
Fusion 360 and ONLY Fusion 360 ;-)