Easy Install Thing-O-Matic Universal X & Y Axis Belt Tensioner

thingiverse

To lessen the likelihood of the Gossamer's thing slipping off bolt heads due to high tension, add sections with a narrow diameter at the bottom of the holes. Although this makes installation harder as bolts need to be fully removed, it helps spread force across a larger surface area and prevents plywood or acrylic damage. Note that over-tightened bolts may deform plywood and crack acrylic. A suggestion is drilling 6mm holes on the left side panel for easy access to bolts holding the left end piece to the Y-Carriage. Furthermore, using a 4.4mm hole allows clear plastic collars from ABP rollers as hole inserts with built-in washers to protect plywood from damage. Always use washers when tightening screws. To modify Gossamer's .SCAD file, change "twice_z_resolution" to double the value of a single layer of printed plastic. After printing, clean up, insert captive nut and remove side panels/plywood parts as necessary for motor mount bolt access. Remove motors, insert printed piece, reinsert motor mount bolts but not too tight, and insert a bolt through the hole on the rear panel or left end piece for Y-belt tensioning. Tighten the belt tension bolt and reattach any removed printer parts to enjoy better printing results at higher speeds.