Vz235 additional TPU grommets

Intended to be printed in TPU, these grommets allow some extra peace of mind when routing wires through the aluminium panel of Vz235.

Designed based on Vz235 CAD, tested with aluminium panels supplied in Mellow's Vz235 kit.

These may also be compatible with Vz330, but I have not tested. Please leave a comment if you've tested this on Vz330 :D

Why grommets, tho?

3d printers create a lot of vibrations, and over time it is theoretically possible for the sheathing on wires to degrade when rubbing on metal edges, leading to electrical faults. As Nero3D the Canuck Creator says, “if you wouldn't rub you d*** on it, it's too sharp and needs some protection”.

Rear pulley access covers are to aid chamber temps and to encourage better air evacuation when the exhaust fan is running (air flowing from bottom panel holes to exhaust fan).

Printing tips:

• These are intended to be printed in TPU, so it is best to print only one at a time. Alternatively, you can enable ‘Complete individual objects’ in your slicer to avoid unsightly stringing.
• Avoid seams/retractions at the slits of these grommets. Consider using ‘Seam painting’ to block seams at the slits. Otherwise, stringing may occur and the slit may not function as intended.
• I otherwise used my general TPU profile with conservative speeds, 3 perimeters, 0.2mm layer height (0.3 first layer), 10% gyroid infill, and 4 top/bottom layers.
• All files are correctly oriented and do not require supports.
• For best appearance, print on a smooth surface.

grommet_bottom_panel_x2:

• You will need to print 2 of these. They go in the bottom panel at the front where the front motor wires may be routed.
• Best installed flat side up.

grommet_ptfe/grommet_ptfe_mirrored:

• For a better appearance, consider increasing perimeters for the first layer (I used 5). This can be applied via a ‘height range modifier’.
• These can be inserted from the front or back of the panel, depending on which side you want to see from the inside of the printer.
• These are intended for wire routing, but a PTFE tube can fit.. However, I do not recommend to route a PTFE tube through here; use the original reverse bowden mount instead. (I will be running LED and chamber thermistor wires through one of these holes, requiring the grommet).

grommet_rear_pulley_access_cover_left/grommet_rear_pulley_access_cover_right:

• For a better appearance, consider decreasing perimeters for the first layer (I used 2). This can be applied via a ‘height range modifier’.
• Lower infill % (eg 10%) is important for easy installation/removal.
• These have little notches in them to allow clearance for the power supplies when mounted in stock configuration.

Bonus installation tips:

• The grommets have been intentionally designed with a close fit to avoid wiggling.
• It is easiest to fit these when warm, either straight from the printer, or reheated on the print bed.

Don't forget to share your makes and leave a comment with any feedback or suggestions!