QIDI Plus 4 - Chamber Heater Fan Kickstand

All kinds of chamber heater issues for the Plus 4....
My chamber heater fan stopped working after the first heated chamber print. After some troubleshooting, the fan still works but only if I depressed the fan in the housing a little bit. Can't keep my finger there, so designed this to push the fan in and engage it. It uses a cut piece of PTFE tube to ride in the injection mold dimple of the fan (couldn't think of anything better that's more readily available).
If you have the same issue, here's a band-aid. Happy printing!

Print Settings

• Rafts: No
• Supports: No
• Resolution: .4 nozzle / .2 layer height
• Infill: 35% Cubic
• Filament brand: Sunlu
• Filament color: Black
• Filament material: ABS

Printed on QIDI Plus 4
Base settings - Generic ABS
(265 C extruder, 90 C bed, 0 C chamber because it wasn't working ;)
Initial layer width .42
Lowered print speeds down to 200 mm/s for anything that defaulted above that.

(print standing on long edge, chamfer down)

Had a bit of warping up from the bed at the ends as it cooled, but doesn't affect the fit at all.

PETG may work in lieu of ABS. This model flexes perfectly to snap into place in ABS though.

Probably don't need 35% infill, but that's what i printed. It was about 4g of filament for the part.

Post-Printing

I cut a PTFE tube 15mm long, then split it length wise. Cut about 1/3 of the circumference, then rolled that 1/3 on itself like a taco.

Then drilled out the center 1mm hole big enough to fit my PTFE taco in snuggly. (do not drill through, just about the same depth as the modeled hole)

With the PTFE taco in the hole, i cut it to a length that would depress the fan enough to make it run. Mine extends roughly 5mm from the face of the part.

Just snaps into place. I put a dab of Super Lube in the injection mold dimple of the fan, but that is likely not needed.

Note - there should be plenty of clearance between the installed kickstand and the bed frame as it moves by, about 1.5mm on mine.

Note 2 - the hole in the model is 1mm to locate the center point, you will want to open it up a bit to fit an appropriate sized piece of PTFE. If you don't have bits to drill this out, you could resize the hole to 2-2.5mm in dia. Make your PTFE taco first and measure what size hole you need. I included the STEP file if you need to rework it in OnShape.

Note 3 - the pre-production models have a larger fan opening than my model. Make sure the part model dimension for the opening matches your housing opening.

Update - I got 3 more heated prints out of this before the fan completely kicked the bucket, just in time to get the warranty replacement from QIDI. This is a band-aid to get you down the road a bit, not a fix. If you are looking to replace the chamber heater fan yourself, this fan from amazon is a replacement I tracked down and purchased https://www.amazon.com/GDSTIME-Brushless-Radial-Blower-Centrifugal/dp/B00ZFPDLE2, but you'll have to lengthen the wires. While swapping in the warranty replacement I verified this fan is a good replacement.