Logitech Momo Force Main shaft with added strength

thingiverse

Firstly, a big thank you to the two sources. This is a very minor mod, and would not have been remotely possible without the work already done. Also, I would not have had a working momo force. :) Interesting, but it seems there are several reports of this particular part failing, and that now, several years after the original release of the wheel. Either way, awesome to know that 3D printing can be used to resurrect! :) This is basically a mashup of the two sources. The Momo Force main shaft seems to break consistently on the same spot, which is where the torque is transmitted through the shaft from the force feedback motor to the steering wheel rim. This spot is where the spacer by ock10 goes to strengthen / repair the shaft. The attached file was created by a friend of mine (Trevor McCormack), who basically added the spacer by ock10 into the (very well done) main shaft by StoraBrollan, making it one big printable part. He also added minor support at the back part where the pot fits, to counter potential warpage / sagging during printing. This part can be cut out with a side cutter or dremel. The spacer in there does mean it is slightly harder to feed the wires for the front buttons through the shaft, but this is by no means a problem. The spacer also requires longer bolts for the connection to the rear metal plate holding the main gear in place. I fitted allan caps, and needed to sink them about 1mm into the shaft body. The calibration part from StoraBrollan is also included, necessary for ensuring that the resultant part will fit well. Depending on your print settings you may need to slightly scale the part up or down. Entire print takes about 10 hours and used about 20m of 1.75mm filament so worthwhile playing with the calibration bit first to ensure you don't waste it! IGS, STL, and STP files included. While you're at it and you've got the whole wheel apart - check the main motor screws, they tend to work themselves loose. Take them out and add some loctite to keep them in place. Also, the rubber stop tends to break apart with age. Use two large tap washers glued together, with minor modding with a stanley knife and a drill. Print Settings Printer Brand: RepRap Printer: prusa i3 Rafts: No Supports: No Resolution: 0.2 Infill: 70% Notes: printed in ABS, bed at 95 degrees, no cooling. Post-Printing requirements Normal basic cleanup will be required afterwards, but since the part is not actually visible, finish is not really important. Had to perform minor cleanup of the holes afterwards to ensure the bolts fit smoothly. The allan caps inside have to be slightly sunk into the plastic body to ensure there is enough bite into the metal plate holding the large gear in place. About 1mm is enough. Will add allan cap measurements - longer allan caps required inside. Front visible ones are ok.