RoBo3D Feet Remix with 92mm RAMPS fan by galaxius

Last crawled date: 2 years, 12 months ago

PLEASE READ ALL
My 40mm RAMPS fan would vibrate through the RAMPS clip on fan mounts and amplify through the base of the printer, most annoying. So I remixed Mike Kelly's 10mm feet to integrate a mount for a Noctua 92mm low profile (14mm) fan. It works awesome, so quiet with no vibration.
I also remixed all the screw holes for M3 bolts. the outer hole is 3mm and the inner hole is 2.5mm. Use a drill to make sure the outer 3mm hole is 3mm so the M3 bolt slips through and tap the inner 2.5mm hole. Using the foot as a guide by putting it on the printer, create a center divit in the base of the printer's corner using a 3mm bit (just enough to leave a tiny dint for the 2.5mm bit to center on DO NOT DRILL THROUGH with the 3mm bit). Remove the foot then complete the hole with a 2.5mm bit and tap it. Install the foot and a 10mm or 12mm M3 bolt. I only use 1 bolt per foot but there allocation for 2.
NOTE: 10mm M3 bolt(s) are required in the PSU corner as there's no clearance for a 12mm M3 bolt.
To mount the fan tap the 3 2.5mm holes of the mounting bracket and attach the fan with 20mm M3 bolts, the bolt should not protrude through the bottom. The bracket allows 6mm clearance under the fan for air intake.
For wiring (details are for the Noctua PWM fan) you can cut the fan's plug and connect a female jumper plug to the black (negative) and yellow (positive) wires (the other wires are unused), or if you're like me and want to keep the fan plug intact make a jumper lead instead. The jumper's black wire goes to the fan's black, and the jumper's red wire goes to the fan's yellow. Make sure you secure other wires out of the way of the fan, kapton tape did the trick for me.
NOTE: There's 2 versions of the fan mount foot where v4a has the front bolt tab chamfer 3mm closer to the corner to allow more room for my LCD mounting bracket. There's also 2 versions of the power plug foot. My plug must be different to Mike's as I needed more clearance (I haven't printed or test fit v2 as I modified Mike's with a Dremel but decided to create v2 for other users). Print 1 "fan" foot, 1 "plug" foot, and 2 normal feet.
That's it, quiet and cool. Printed in PLA with 2 perimeters, 3 top/bottom layers, at 0.3mm layer height, with 25% honeycomb fill (better strength than rectilinear), sliced with Slic3r.