This is a lid spacer with external spool holders designed to interface with the Flashforge Inventor 3D printer. It may also work with the Flashforge Dreamer and the Dremel Idea Builder. In order to complete this project, you will require approximately 1.2 kg of ABS filament (more than 1 spool), 5/8 inch round wood dowel, a piece of PFTE filament tube (3mm inner diameter, 4 mm outer diameter), and your choice of the following to attach the parts together:
- Qty 30 metric M3 x 0.5 x 12 mm socket head cap screws (or similar fasteners close in length) with matched nuts;
- Acetone if printing in ABS or chemically compatible glue; or
- 10 appropriate size binder clips.
The lid spacer, once assembled, can rest on the top of the 3D printer and allow for the 3D printer lid to be raised by 10 cm. It is not intended to be glued to the 3D printer. The spool holders support different spool sizes and allow for individual spool replacement. The lid spacer also features a recycling triangle with resin identification code 7 (other) and the letters ABS to enable eventual recycling of each part (if printed using ABS).
All parts printed individually in vertical orientation without support.
Each part will print with one of the following identifying markings on the inside:
FR/RL = Front Right / Rear Left corner part (qty 2 required);
C = Center front / rear part (qty 2 required);
FL/RR = Front Left / Rear Right corner part (qty 2 required); and
S = Side part (qty 4 required).
Note that the part filename includes the applicable identifying marking.
Extruder temperature for ABS: 245 degrees Celsius.
Heated bed temperature for ABS: 110 degrees Celsius.
Bed adhesion method: using a dried layer of Elmer's washable school disappearing purple glue stick and setting a 7 mm brim around parts.
Fan disabled for the first 1 mm.
Printer lid removed.
Honeycomb infill pattern.
Total print time (depending on print speed settings): approximately 140 hours!
Allow parts to fully cool prior to removing them from the print bed.
Carefully remove brim and use your preferred method of acetone smoothing (ABS printed parts only).
Attach parts together, referring to the identifying markings, to form a large ring using your choice of fasteners (I will upload a photo showing the final result as soon as available).
Cut the wood dowel in 4 pieces to fit in between the spool holder brackets.
Cut 4 pieces of PFTE filament tube to desired length.
Reused some dimensions and features from my prior spool holder designs.
Measured 5 different filament spools and ensured that the spool holder could accommodate all of them.
Made several attempts to get the curve right for each corner (it has elliptical properties).
Made several attempts to optimize the print quality without the use of support (originally, the parts were meant to be printed horizontally).
I am locking the design of the spool holder part S at rev. 7 as I am very satisfied with it. If I decide to modify it in the future, I will create a whole new thing.
For this lid spacer design, I may tweak the total width and depth by 1 or 2 mm (only if absolutely needed). Should this happen, I would limit the change to the center part C if only a changing the width or to the FR/RL and FL/RR parts if changing both width and depth. In other words, I would not create a situation where all parts would have to be reprinted.
Rev. 8 Update
Well, I made some minor updates to all of the parts from rev. 7 but none of the updates impact backwards compatibility with rev. 7 parts so did not create a while new thing; I preserved the rev. 7 style and added the rev. 8 style as an option.
Changes in rev. 8:
Part C now has a flat support base, enlarged screw holes (+0.2mm diameter), and a lid retaining edge at the top;
Part S now has a flat support base and enlarged screw holes (+0.2mm diameter); and
All other parts simply have enlarged screw holes (+0.2mm diameter).