Category: Fucking Machine

So yeah, when the machine stops fucking mid session it is really no fun. Then you’re just like a primative trying to do things manually… Anyway, the cause of the issue was:

• The heat generated by the wiper motor in an enclosed case, caused some expansion of the 3d printed flywheel
• The rotation of the flywheel was clockwise which allowed the nut to get loose.

Because of those two, the nut that secures the flywheel down to the small gripping area of the motor shaft got loose, and the fucking machine thrusts became irregular, or not at all as the flywheel was no longer rotating.

The solution is a new part. I re-designed the 3d printed part to fit around a 5/16th nut, and reversed the polarity of the motor, causing the flywheel to run in a counter clockwise direction.

The outside of the area that captures the nut fits a 19mm socket, so it can be threaded onto the motor shaft and tightened. Should try and see if I can break it again 🙂

This machine is based on a windshield wiper motor which is speed controlled by a hardy motor speed controller.  It can be adjusted from 0 thrusts up to more than 3 thrusts per second if you so desire. The depth of the thrusts can be controlled by the various mounting points on the 3D printed Flywheel.  The maximum depth with this setup is close to 6 inches, but that could be varied per your flywheel design. In our use of it, we have found that a shorter thrust, at a higher thrust per minute is most desireable.  This could lead to a smaller system if you wanted to make modifications so that it was more portable.

Currently, the size of the system is perfect for sitting on a rug or some other non-slip surface and having enough weight that it doesn’t move around at all even when bottoming out on it’s stroke.  Instead it tends to push the subject as it bottoms out. Partially this is due to the design of the feet, they allow for all of the weight of the fucking machine to be concentrated on less than 1 square inch, allowing for a higher weight per square inch.  Use with the bolts alone as feet is perfect for a carpet surface. If it is to be used on a wood or tile floor, and not have the bolts mar the surface in any way, you can use the 3D printed feet, then the device sits on about 4 square inches, but non-slip feet can be added for additional grip.  Because the feet simply unscrew, they are simple to put on or remove as conditions change.

Rod Ends – https://amzn.to/2V2hdwX 

Threaded Rod – https://amzn.to/2HxjQir 

Bearings – https://amzn.to/39Mnwcc 

5/16th Rod – https://amzn.to/2HCM5Mt 

Alluminum U Channel – https://amzn.to/3bNX9Ey 

¼ 20 Threaded Inserts to use as adjustable feet support with bolts below – https://amzn.to/2P4XnNM 

¼ 20 Bolts – https://amzn.to/2HwYvpn 

5/16th Universal Pin – https://amzn.to/2V1P5dp