Prusawire alternative belt routing mod

On Prusawire 2025.B1 is belt routed on top of frame where could colide with toolhead. And during discussion with others this idea was born. Frame extension moved to frame and belts is crossing throug them. Also ball bearing idlers were replaced with GT2 16T idlers. This mod also add option to tension belts similar way as on Prusa MK3 by screws at steppers. Toolhead mount is modified from Voron Trident.

For this mod you have to adujust the configs, and invert the direction for the X and Z stepper!

Files are prepared for MK4 and MK3 frame. In case of MK3 frame XZ gantry is moved 1mm forward to avoid colision with heads of PSU bolts. Same solution will be used in Prusawire B2.

I have printed these parts from ABS+.  0,4mm 4 perimeters, 5 top and bottom layers, 40% infill.

Test frame is being buld at this moment.

Changes:

-frame spacer mk4 v1.1 -Increased wall thickness at bolt holes to prevent split that could occur.

Used hardware: (might be inaccurate)

GT2 16T iddler with teeth, 3mm bore 6pcs

GT2 16T iddler withhout teeth, 3mm bore 4pcs

GT2 20T pulley 5mm bore 2pcs

GT2 belt 1510mm 2pcs

hexagon socket head bolts  ISO 4762:

M3 x 10      4pcs

M3 x 14      8pcs

M3 x 20     2pcs

M3 x 30     12pcs

M3 x 35     2pcs

M3 x 8       6pcs

M5 x 60     8pcs

hexagon socket button head screw ISO 7380:

M3 x 12      2pcs

M3 x 16      3pcs

M3 x 30      16pcs

M5 x 20      4pcs

M5 x 10       8pcs

nuts:

BN 1054 M3 threaded insert 10pcs

DIN 562square nut M3 8pcs

ISO 4032 / DIN 934MATICE M312pcs

M5 slot nut 8pcs

washers:

ISO 7089M5 washer 2pcs

DIN 988 M3 shim washer 0,5mm 20pcs

Stepper covers could be alternatively mounted with magnets 7x2mm 4pcs instead of screws.