Locking Spool Holder
Locking Spool Holder
Published 2018-08-15T16:27:56+00:00
This is a two piece spool holder, designed to lock onto 1.5" x 0.75" wood rails and sized for standard 1 kg spools. It was modeled in Onshape.
Once attached to the rail and with a spool added, the holder CANNOT pop off the rail without either delaminating walls apart or by ripping the plastic across the layers. Where the parts interface with the wood is held together by 2 dovetails, which reduce the material required to prevent snapping by forming a complete loop of material around the rail.
The spool is held very close to the wooden rails (~5 mm), reducing torque on both the wood and plastic. The holder itself is very narrow, 25 mm wide, and so can easily fit not only into most spools, attach to the rails in either the space left by the used spool of filament, and even fit in front of a nearly full roll of filament without interference.
Assembly is simple: Slide the main hook (Main_Hook_Body.stl) over the top of the rail. Insert the locking plate (Locking_Base_Plate.stl) into the slot in the main hook from the bottom at a 90 degree angle (clockwise or counterclockwise; it shouldn't really matter). The T-shaped key should be in line with and flush with the top surface of the hook. Rotate the locking plate until the sides are flush with the sides of the main hook. Huzzah, you now have a complete locking spool holder.
You may wish to do the above before actually attaching the parts to a rail. Depending on the tolerance of your printer, the parts may seize, and it's easier to deal with when free. Clearance on the parts is 0.4 mm.
Parts should be rotated onto their sides. The dovetails should be clearly visible from the top. Bridging will be required in both parts, but less than an inch in both.
Use additional shells than compared to a standard print, e.g. a 1.2-1.4 mm wall. Most of the strength of the part is derived from the shell thickness. A Moarstruder, for example, is an excellent extruder to use for the additional nozzle thickness and layer height. A stiff filament is best, so PLA works wonderfully.
Minimum time to print and material quantity is based off of a 0.7 mm nozzle with a layer height of 0.4 mm and a skirt, and a shell thickness of 1.4 mm, roughly on par with a Moarstruder. *cough Use a Moarstruder if you can, it's stronger *cough Maximum time to print is base off of a 0.4 mm nozzle with a layer height of 0.2 mm and a brim, with a shell thickness of 0.8 mm.
Date published | 15/08/2018 |
Time to do | 99 - 100 minutes |
Material Quantity | 39 grams |
Dimensions | 59.1 mm x 115.5 mm x 25.0 mm |
Support Free | YES |