Thingiverse
Precision Prusa, w/Modular Hemera X-Axis
by Thingiverse
Last crawled date: 6 years, 2 months ago
Precision Prusa with linear rails, lead screws, and modular Hemera-based X-Carriage!
NO MORE BELTS!!!
Upgrade your Prusa (or other printer) to linear rails and lead screws for EXTREME ACCURACY!!
Can't decide what hot-end to use? Neither can I!
Use 1 OR 2 Hemera's (native support), direct drive, bowden, Bed level sensor, or mix and match! Its only a few bolts away with this simple modular X-Carriage. The two-sided x-carriage is designed to bolt directly to the Hemera extruder, but it will accept anything you can think up... Bolt pattern is 34 mm x 34 mm, M3 10 mm. Plate face is 40 mm x 40 mm. (See drawing)
My mount plate designs (shown) can be found here --> https://www.thingiverse.com/thing:4064655
My build uses Sensor-less homing, but if you use end-stops, this features an easy adjustment of X and Z end-stops with just a turn of a screw (designed for regular sub-micro switches or the red boards found on amazon(pictured). Just use the files marked "Z-MotorMount_LeftwZsensor"and End-Stop-Mounts. Otherwise, the Z Motor mount and Gantry Mounts are the same for both sides.
Parts used in this build (Est ~$200 for mechanical parts -- Electronics not listed):
4x LM8UU linear bearings
4x 400 mm 2020 aluminum extrusion (Pick whatever size you want! 400 mm allows for a 200 mm wide bed)
2x 400 mm linear rail/bearings (MGN12H)
4x 400 mm x 8 mm diameter lead screws
4x lead screw nut thingies with optional backlash springy thingies
Nuts-n-Bolts:
I recommend just buying a pack of M3, M4, and M5 nuts and bolts. They're around $10 on amazon. Also, get a pack of M3, M4 and M5 T-Slot nuts.
Optional end-stops
2x M3 40-60 mm screws (if you use X and Z end-stops)
4x M3 10mm Screws
Optional X-Axis reinforcement:
M5 bolts and T-slot nuts to fasten the sides to the aluminum extrusion. Simply press-fitting them seems to work okay too.
UPDATE:
I've got it all tuned up and it's running amazing. Max speed of 200 MM/S and still passable accuracy for a draft (picture shown). Incredibly, ghosting/ringing is at a minimum even at those speeds. That said, I probably won't be printing at 200 mm/s very often. Only for rough drafts.
Final build runs TMC2209 drivers on an SKR 1.3, and 2.1A X and Y steppers at 24V. Results may vary with lesser specs. Be sure to keep it lubed! I used Superlube, but would recommend some kind of oil instead.
NO MORE BELTS!!!
Upgrade your Prusa (or other printer) to linear rails and lead screws for EXTREME ACCURACY!!
Can't decide what hot-end to use? Neither can I!
Use 1 OR 2 Hemera's (native support), direct drive, bowden, Bed level sensor, or mix and match! Its only a few bolts away with this simple modular X-Carriage. The two-sided x-carriage is designed to bolt directly to the Hemera extruder, but it will accept anything you can think up... Bolt pattern is 34 mm x 34 mm, M3 10 mm. Plate face is 40 mm x 40 mm. (See drawing)
My mount plate designs (shown) can be found here --> https://www.thingiverse.com/thing:4064655
My build uses Sensor-less homing, but if you use end-stops, this features an easy adjustment of X and Z end-stops with just a turn of a screw (designed for regular sub-micro switches or the red boards found on amazon(pictured). Just use the files marked "Z-MotorMount_LeftwZsensor"and End-Stop-Mounts. Otherwise, the Z Motor mount and Gantry Mounts are the same for both sides.
Parts used in this build (Est ~$200 for mechanical parts -- Electronics not listed):
4x LM8UU linear bearings
4x 400 mm 2020 aluminum extrusion (Pick whatever size you want! 400 mm allows for a 200 mm wide bed)
2x 400 mm linear rail/bearings (MGN12H)
4x 400 mm x 8 mm diameter lead screws
4x lead screw nut thingies with optional backlash springy thingies
Nuts-n-Bolts:
I recommend just buying a pack of M3, M4, and M5 nuts and bolts. They're around $10 on amazon. Also, get a pack of M3, M4 and M5 T-Slot nuts.
Optional end-stops
2x M3 40-60 mm screws (if you use X and Z end-stops)
4x M3 10mm Screws
Optional X-Axis reinforcement:
M5 bolts and T-slot nuts to fasten the sides to the aluminum extrusion. Simply press-fitting them seems to work okay too.
UPDATE:
I've got it all tuned up and it's running amazing. Max speed of 200 MM/S and still passable accuracy for a draft (picture shown). Incredibly, ghosting/ringing is at a minimum even at those speeds. That said, I probably won't be printing at 200 mm/s very often. Only for rough drafts.
Final build runs TMC2209 drivers on an SKR 1.3, and 2.1A X and Y steppers at 24V. Results may vary with lesser specs. Be sure to keep it lubed! I used Superlube, but would recommend some kind of oil instead.