New Project Started
- Thread starter saneagle
- Start date
Finally some progress. Other things have been getting in the way. The main obstacle has been the problem of how to deal with the torque reaction from the motor on a full-suspension bike, so here's how I did it, which can easily be copied by any of you lot. All you need is some 2.5mm steel plate/strip of any metal that has similar stiffness, then a drill and a file/angle grinder to shape it.
There isn't quite a straight line from the fixing point on the motor's anti-rotation plate, so you need to file or grind a slight scallop in one edge.
The main problem was to find a secure anchor point for it. I wasn't happy that a normal P-bracket would be secure enough, nor a plastic printed part to be strong enough. Then I found these, which were perfect. I can use the back 6mm fixing point to hold a bracket for the musguard. It's OK as it is, but a bracket would be better:
Here is the torque arm now fitted:
The clearance between the motor and the swinging chainstay is very tight. The lug for the screw interfered at first, but I managed to get just enough rotation to clear it:
There isn't quite a straight line from the fixing point on the motor's anti-rotation plate, so you need to file or grind a slight scallop in one edge.
The main problem was to find a secure anchor point for it. I wasn't happy that a normal P-bracket would be secure enough, nor a plastic printed part to be strong enough. Then I found these, which were perfect. I can use the back 6mm fixing point to hold a bracket for the musguard. It's OK as it is, but a bracket would be better:
2X Motorcycle LED Spot Fog Light Handlebar Bumper Mount Bracket Clamp 32mm UK | eBay
Wide Application: Two-sided screw holes for easy mounting of more accessories. 2 Piece Holder. Compact Body: The support body is compact and light, making it easy to grip and less difficult to install.
www.ebay.co.uk
Here is the torque arm now fitted:
The clearance between the motor and the swinging chainstay is very tight. The lug for the screw interfered at first, but I managed to get just enough rotation to clear it:
Do you think all this effort was necessary? Theoretically TSDZ2B should be OK without extra support.
I was wondering what this extra hole in bracket is for. Now I know
Here's the finished thing. The chain comes off in first gear, the tyres rubbing somewhere, but only when I'm riding it, and the speed sensor doesn't work. I'll soon get those sorted:
Apart from a few adjustments, this is stage one of the project that has three stages. More to come when I make more progress.
Apart from a few adjustments, this is stage one of the project that has three stages. More to come when I make more progress.
I would say that the friction from the bracket on the BB has no chance of resisting the motor's torque. That's why they ptovide their own anti-rotation arrangement.Do you think all this effort was necessary? Theoretically TSDZ2B should be OK without extra support.
I was wondering what this extra hole in bracket is for. Now I know
It is added there as extra measure. TSDZ8 don't have this extra bracket and it is expected to stay in place. One way or another your solution won't hurt for sure.
The solution is a good one. It's rock solid, much more so than the splines at the back of the V shaped bracket that comes with the kit.
TSDZ2B and TSDZ8 brackets are almost the same. Just TZDZ8 is a little bigger. I hope it will hold. If not I will send it all back to WOOSH
...or I will make them to send me gizmo like yours.
Unfortunately tools provided by Tongsheng are not very impressive. For that I might need my own gizmo. Two bolts and longer handle should do the trick.
Do you think it might be worth to add a drop?
Finally, I can use first gear. The torque arm bracket anchor (spotlight mount) comes as a pair, so I had one to use. I cut off a strip of stainless and had my chainguide in 5 minutes. Muddy ride yesterday:
Did you see my mate? Fat guy with a fishing rod. Looks exactly like Shrek, but with a beard and tattoos. He keeps offering me fish pies baked by his daughter, don't think he likes them.
Mid-drive? Torque sensored? I thought you hated both. Does not compute!
I reckon the small, puny and flimsy TSDZ2 is the wrong choice for you. I hope things continue ok, but I expect one or more of the many anxieties TSDZ2 owners live with made real, will ultimately serve as confirmation amplifying your bias against mid-drives. You really should have installed a cadence sensored, easy to firmware configure 36V BBS01B. 36V, because I'm unsure if all 48V BBS01B controllers can have firmware altered. BBS01B controllers last longer than the BBS01's used to. Far fewer anxieties overall.
Didn't @harrys make the PAS on his TSDZ2 cadence sensing, by way of firmware finagling? Perhaps an option to try, if torque sensing gets on your nerves.
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You have to take one for the team sometimes. It's not too bad because it's the 48v version., but I do need to pedal harder most of the time, but not when I'm climbing very steep hills. I went up a 30%er today, which was at the end of a a long climb of about a mile. It's for a project that needs very good climbing torque, and there are reasons it would be difficult to use a rear hub motor, in particular because I need a special axle.Mid-drive? Torque sensored? I thought you hated both. Does not compute!
I look forward to reading about how long your TSDZ2 lasts being used like that!
It's ok for you and @Nealh to use tiny mid-dives then, because TSDZ2s are only ickle. So small and girly, they hardly count
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