@Vernon_Barry - for the Wanhao i3 printers, I noticed the y belt is nut square to the unit. The stepper pulley and idler pulley are about 6mm out of alignment. Have you looked at this?
My solution is to flip the stepper pulley which puts them in alignment.
Norbert
Very nice tip, thanks! Nice alignment checking setup as well. Suggest some Z and Y braces, though I suspect you may be aware of those options already.
A cheap threaded rod fits in the cutout for the wires and with some nuts and washers becomes a frame stiffener directly under the belt, helped with my unit to go a little faster printing with less ringing. The front and back plates on mine visibly flexed slightly and the belt shortened and tilted just a tiny bit on direction changes on the Y axis after adding the weight of a glass printbed and thicker Y carriage plate. I felt it needed the center of the thin metal plates supported and held at a precise distance.
Here is a bracket for the front of that setup I described to save the frame paint for resale or just for obsessive attention to detail.
@AlohaMilton - I’m in the process of making multiple upgrades to the printer (Z-brace is one of them) and I have the brace you show in the picture that goes on the from and back face plates.
I also have adjustable feet for the corners and tower. I’m swapping out the standard bearings for LM8LUU ones and I’m changing the X-axis carriage to look like the i3+ with two LM8LUU bearings. I will also put on borosilicate glass and maybe PEI film too.
I will definitely show it off after the build.
Regards,
Norbert
