Thingiverse
Replicator y-axis belt tensioner by garyacrowellsr
by Thingiverse
Last crawled date: 3 years ago
The Y-axis belts on my Replicator* have always been a bit floppy, and attempting to tighten them a notch always seemed to skew the carriage and make them drum tight. The original source Thing:30708 seemed like a good idea. There were a couple of issues that needed to be fixed up though. First, I try to never leave a free nut that has to be placed and tightened blindly - a printed-in nut holder is always the way to go. Secondly, you would have to carefully measure and drill the holes to ensure the thing is correctly aligned with the belt. This was solved by making it clip over the edge of the top plate, so that the edge of the plate automatically aligns it properly. Then only one mounting screw is required. Also, the clip itself is the drill guide - you can't miss.
The clip is symmetric so you can just print two of the same for the left and right belts on the Replicator. This should work for Replicator clones too, though I think many of them only use one belt.
It could be reworked to place it closer to the drive pully, but it seems fine where it is. Also you may need to alter the OpenSCAD file if your top plate thickness is significantly different from 6mm.
*(Yes Replicator, not Replicator 1, or Original Replicator, but Replicator, period. If MakerBot marketing geniuses wanted to create confusion by also naming a later model 'Replicator' that's a problem of their making, and I don't have to cater to it.)
The clip is symmetric so you can just print two of the same for the left and right belts on the Replicator. This should work for Replicator clones too, though I think many of them only use one belt.
It could be reworked to place it closer to the drive pully, but it seems fine where it is. Also you may need to alter the OpenSCAD file if your top plate thickness is significantly different from 6mm.
*(Yes Replicator, not Replicator 1, or Original Replicator, but Replicator, period. If MakerBot marketing geniuses wanted to create confusion by also naming a later model 'Replicator' that's a problem of their making, and I don't have to cater to it.)
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