Recent content by Gryphe

Hence me having started trying it last year. As long as you're not trying to push your motor to its limits heat really isn't an issue. The temperate climate might be a great help in this regard but seeing as I'm printing these prototypes with a somewhat heat-proof type of plastic (needs at...

The 235kv motor should still you provide you with plenty of torque. I've tested this configuration with my old 4S Lifepo4 8.2 Ah battery and a 100A car ESC from HK. This should give you a speed of 25 km / hr and a (pedal-assisted) range of 18 kilometres. Roughly 16 miles / hour with a 11 mile...

A colleague of mine has expressed interest in letting me build a similar system for him. Obviously he wants me to do it for a somewhat cheaper price, so I designed a mount for the 50mm SK3 5065 236kv motor. I've updated the source files as mentioned in my first post to include the two new...

As promised, some real life pictures. The bike's been quite dirty with all the construction work going on everywhere, so sorry about that.

Good morning, I'll get a set of pictures later today. The above screenshot demonstrates the limiting system, which creates a 20 degrees angle for the arm to move in. When releasing the throttle I slow down, rather then completely stop the motor. (I use an Arduino for the motor control.) So...

Good day to you all, As some of you might be aware sometime last year I released the files for a 3D printed friction drive. As time passed however I was getting increasingly disappointed by the performance of my (way too high KV) motor. Roughly five weeks ago I decided to resume development...

With the 42mm SK3 motor I've been using weight hasn't been much of a issue; the plastic provides a bit of a cushioning effect and with the repeated abuse tests it's gone through there have been no signs of cracks. With the 50mm that will arrive soon I expect this to become more of a challenge...

Hiya, I considered those options but past prototypes have shown these have a tendency to cause a lot more tear and wear, strangely enough. Now, I tested a working roller design yesterday and though the roller was working the entire mechanism somehow jammed and exploded into a thousand pieces...

Seeing as how my roller design needs more time at the moment I instead designed a can-based mount. Feeling fairly confident I rode the ~15 km to work this morning. It hasn't fallen apart yet, so that's always a good sign. Main features include but are not limited to; Using a hose clamp to fix...

Speaking of those 200, I passed the 300 earlier this day. (I commute to work by bike) Seeing as how my new shipment of plastic failed to arrive today I put some of my leftovers together to check out the new prototype. So far I'm quite pleased with the results. The new pivot mechanism is...

I'm currently awaiting a new shipment of plastic. (I've gone through a lot in the past few weeks.) It should arrive tomorrow and will allow me to print and test a new variation of the drive, relying on a roller rather then the can of the motor. (I'm worried about motor wear.) The roller will be...

About 5-6 hours of printing, using ~30 meters of 1.75mm filament.

Alright, with the tests complete I hereby release the STL files. You can download them here. These are production files so they might include a few additional meshes. (Mostly used to assist with the printing process.) Feel free to do whatever you feel like with them. Just mention me if you...

A video will be tough but I'll see what I can do. I'll get those STL files posted as soon as I've tested the latest revision of the arm. (I was starting to notice some wear in a specific region so I'm printing an improved version at this very moment.) As for those previous prototypes, well...

Just take a look at the images; these should give you a general idea of the mechanism. I divided the exploded view into three seperate groups; the locking handle, the pivoting arm and the clamp itself. Since the design's main focus was to get it working on my own bike I haven't looked into...