Help with Rear-Wheel Cellmen DD-motor

General Discussion about electric bicycles.

Help with Rear-Wheel Cellmen DD-motor

Postby stypherfire » Wed Aug 22, 2012 4:56 pm

So i just received my rear mac motor kit and i am having trouble with mounting the rear wheel. I have just taken off the existing rear wheel (whew it was hard) and put it onto the motor whee; (even harder @_@). Now the problem is that i have a total of i think 7 washers/rings/thingy i need to place somewhere between the forks and outer nuts. look at the below images for what the look like and which side i think they are on... Also i am pretty sure the torque arm goes on the outside of the derailer side of the forks however if there is no space then what @_@. Please and thanks for the help! Also i forgot to add that the 3rd piece on the top (small nut with a thing sticking out), that thing sticking out is bent in 1 direction as is the same for the one on the wire side.

Image
stypherfire
100 mW
100 mW
 
Posts: 48
Joined: Thu Jul 19, 2012 3:41 pm
Location: Toronto, ON

Re: Help with Rear-Wheel Cellmen DD-motor

Postby dogman » Wed Aug 22, 2012 5:37 pm

Well, first thing is, you may not use everything, just because it came in the kit.

The first thing is to determine what you need to put the motor just right into the space between the rear dropouts of the bike.

You might need a spacer washer, or not, on the gear side. Gotta have the gears not rubbing right? Or the forks may be wider than the shoulder cut into the axle, requiring a spacer washer. Or it may be too big. Alloy frames can bend out a very small bit, like 2mm each side max. A steel frame can just be bent out to what you need, like 5 mm per side.

Then it's down to fitting the washers and torque arm to the outside. If you have just one torque arm, put it on the side without the derailur if it fits better there. Yes, this is a pain because you have to take the plugs off the wires to get washers and torque arms and nuts on that side.

At this point, the fit of the first washer touching the frame is cruicial. On rear dropouts, this is usually no problem. The main thing is the washer must lay perfectly flat But you might need a washer under the torque arm to make it lay flat if something on the frame sticks out. You might need to grind a notch in the arm or the washer, for example if the derailur interferes.

So do whatever looks like it fits good. Bottom line, you need at least a torque arm followed by a nut on one side. And a washer followed by a nut on the other side. Which washers you use is your choice, depending on how you see them fit the best.

The torque washers with the tabs are optional for sure. They are utterly useless as a torque controller. But they make good spacers if you need to get a torque arm clear of something on the frame. You can use the split lock washers if you have enough axle length to fit them and the nut.
THE LIPO RULES. NEVER ABOVE 4.3V NEVER BELOW 2.7V DON'T PUNCTURE

Ideal charging /discharging range for Lipo, 3.65v minimum 4.1v maximum

See battery technology section, FAQ thread at the top of the page for lipo noob info.
User avatar
dogman
100 GW
100 GW
 
Posts: 22056
Joined: Sat May 17, 2008 12:53 pm
Location: Las Cruces New Mexico USA

Re: Help with Rear-Wheel Cellmen DD-motor

Postby stypherfire » Wed Aug 22, 2012 9:16 pm

Thats perfect i can figure it out probally! i'll post back here on results. Question.. is there anyone else other then hobbyking that sell the turingy 6s 20 C 5000ahm lipo packs? i have getting pretty tired of waiting 3 weeks just so they can tell me it is still at the warehouse in print order...
stypherfire
100 mW
100 mW
 
Posts: 48
Joined: Thu Jul 19, 2012 3:41 pm
Location: Toronto, ON


Return to E-Bike General Discussion

Who is online

Users browsing this forum: Bing [Bot], bowlofsalad, deffx, mark5, TRIGON391, Wummi, Ypedal and 18 guests