Recent content by Dani

I thought about it and I still don't know. This will be compact, but it will take space in the frame triangel, where I wanted my batteries. Next problem is to get the belt from the triangle to the rear without interfering with the frame itself. A full suspension bike will be easier as my...

I looked for the crossbreak setup, I think I found what said. It's a good setup, though it limits me in chosing gears. But I can live with that. If I would use a small gearbox like this (with only 1 gear), this could save some space and belts and .. well, I'll stick to the two stage beltdrive...

I see.. thanks for the explanation.

As much as a bike can handle :twisted: I'll have a look at this later today, need to take a written exam :? Thanks again, this is very helpful

That sounds good. I'd love to get rid off the chain. So noisy, very nasty. Belt drive <3. If I chose a 30cm pulley on the rear that would give me a reduction of 10.5. Now I'd only need 1:3 for the primary reduction. So a 9cm diameter pulley would do the job (instead of the big ~14,3cm wheel)...

something going on here :D At this stage I need to reconsider some things, before this becomes effortless. I want 2000W. So the small GNG motor provides 48V x 40A = 1920W. Close enough. The RPM should be 3200 something, under load maybe 3000 (hill climbing) ? Also I want torque badly. I...

Oh you! A gearbox is designed to hold under load :lol:

Hm.. thanks for the input. I couldnt find any source for someone trying such low tooth count. I have no experience with timing belts, yet. In the end I think it's easiest to just use a classic 3 stage gearbox. No huge pulleys, no belts, pretty silent and somewhat cool sound. Rocksolid. I...

Is that better? :D It's free at last for me. As a student, you know.. cross post over here Right now I'm stuck at the pulley. I don't want the full 25mm width, it looks too bulky and costs too much in lasercutting. Also the lasercut is bad for tiny radiuses. Instead I try 8M with 20mm. Main...

Thanks for the insight. I thought 8M with 20mm should do the job as good as 5M with 25mm. I see now that the tooth count on the driver is a problem, indeed. 90T/18T = 5, so you have a reduction of 1:5. 18T (5M) = 28.65 pitch circle. Minimal suggested tooth count on 8M is 22 with a pitch circle...

:D no. No helicopter, jetski, hovercraft or anything that moves outside my garage. :P

A design question: Why did you go with HTD 5M with 25mm instead of, say, 8M with 20mm?

I forgot: I live in germany, no sense in building anything that moves on a road. Too many laws etc

Hi guys, I have a 7kW DC motor lying around and I don't know what to do with it. It was a CNC drive or something similar, once. Regarding the motor: It has two modes, which read: S1: 152 V / 33,2 A / 4500 W / 3000 rpm (without fan) S2: 155 V / 51 A / 7000 W / 3000 rpm (with fan "10 l/sec"...

It will be www.fabtools.de I don't intend to do commercials, but this is the best I could find. It's "cheap" compared to other locals and you can upload .dfx files and get a quote almost instantly. I chose Lasercut HQ, aluminium. Although it is german, you can easily use it. The keywords are...