Thingiverse
Ender 3 Dual Z-Screw with single stepper
by Thingiverse
Last crawled date: 4 years, 3 months ago
Design for an Ender 3 (and Ender 3 Pro) Dual Z-Screw, using a single Z stepper, with no loss in Z-Height build volume.
Utilizes 2 new lead-screws (in my case, 500mm long)... this so that there is no loss in the Z-Height. I suspect that 450mm or even 400m lead screws will be sufficient, but will be best to check before buying.
Please Note! I would recommend turning the tensioner around 180 degrees when mounting (so that the tensioner extends towards the rear of the printer (opposite to attached pics), more so if you have any mods on the hotend (cable guides, or direct drive etc)
Print two of 'top_left_up_20_MK1.stl', and one of everything else. STL's are laid out in the correct orientation for printing. Should be noted that the PSU Mounting bracket pretty much utilizes the full 235x235 build surface area, so it will need to be rotated a bit to ensure it fits. If your build plate is set to the stock 220x220, your slicer might not allow you to slice the part.
At this time, the mounting holes for the PSU are not quite 100% aligned correctly. I have to ream them out a bit to get the PSU mounted to the bracket. New version will be uploaded when it is available.
The Lead-screw bracket and Tensioner requires supports while printing... all the other files can be printed without supports.
All holes in the printed parts may require drilling to ensure bolts fit. Some filament contract a bit more than others.
Parts you will need:
1 x Lead Screw nut
2 x 60 tooth GT2 6mm pulleys.
3 x 608ZZ bearings
2 x 8mm Lock Collars
2 x 500mm lead-screws (this is what I used, can likely get away with 2 x 400mm).
1 x 800mm closed loop GT2 6mm toothed belt.
1 x 16 tooth idler pulley for GT2 6mm belt
1 x smooth idler pulley for GT2 6mm belt
18 x M5 by 10mm hex key bolts
18 x M5 V-Slot T-Nuts (I used the slider type... I find them easier to use)
2 x M3 by 20mm hex key bolts (Idler pulley mounting bolts for Tensioner Pulley Holder)
4 X M3 by 12mm hex bolts (Lead Screw Nut mounting bolts)
1 x M4 by 30mm hex key bolt (tensioner adjustment)
1 x M4 Riv Nut for tensioner adjustment. May need to heat the Riv nut a bit to get it seated in the tensioner housing... be careful not to melt the tensioner bracket, since space is a little limited there. I used a soldering iron to simultaneously heat and push the Riv nut in.
Future modifications.
Replace the 2 lock collars and 2 608zz bearings with 2 Pillow Block Bearings.
Modify the PSU bracket for better alignment.
Utilizes 2 new lead-screws (in my case, 500mm long)... this so that there is no loss in the Z-Height. I suspect that 450mm or even 400m lead screws will be sufficient, but will be best to check before buying.
Please Note! I would recommend turning the tensioner around 180 degrees when mounting (so that the tensioner extends towards the rear of the printer (opposite to attached pics), more so if you have any mods on the hotend (cable guides, or direct drive etc)
Print two of 'top_left_up_20_MK1.stl', and one of everything else. STL's are laid out in the correct orientation for printing. Should be noted that the PSU Mounting bracket pretty much utilizes the full 235x235 build surface area, so it will need to be rotated a bit to ensure it fits. If your build plate is set to the stock 220x220, your slicer might not allow you to slice the part.
At this time, the mounting holes for the PSU are not quite 100% aligned correctly. I have to ream them out a bit to get the PSU mounted to the bracket. New version will be uploaded when it is available.
The Lead-screw bracket and Tensioner requires supports while printing... all the other files can be printed without supports.
All holes in the printed parts may require drilling to ensure bolts fit. Some filament contract a bit more than others.
Parts you will need:
1 x Lead Screw nut
2 x 60 tooth GT2 6mm pulleys.
3 x 608ZZ bearings
2 x 8mm Lock Collars
2 x 500mm lead-screws (this is what I used, can likely get away with 2 x 400mm).
1 x 800mm closed loop GT2 6mm toothed belt.
1 x 16 tooth idler pulley for GT2 6mm belt
1 x smooth idler pulley for GT2 6mm belt
18 x M5 by 10mm hex key bolts
18 x M5 V-Slot T-Nuts (I used the slider type... I find them easier to use)
2 x M3 by 20mm hex key bolts (Idler pulley mounting bolts for Tensioner Pulley Holder)
4 X M3 by 12mm hex bolts (Lead Screw Nut mounting bolts)
1 x M4 by 30mm hex key bolt (tensioner adjustment)
1 x M4 Riv Nut for tensioner adjustment. May need to heat the Riv nut a bit to get it seated in the tensioner housing... be careful not to melt the tensioner bracket, since space is a little limited there. I used a soldering iron to simultaneously heat and push the Riv nut in.
Future modifications.
Replace the 2 lock collars and 2 608zz bearings with 2 Pillow Block Bearings.
Modify the PSU bracket for better alignment.
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