Search found 3691 matches

by teklektik
Apr 26, 2018 1:22 pm
Forum: Motor Technology
Topic: Calculating QS205 motor torque vs. speed curves
Replies: 3
Views: 146

Re: Calculating QS205 motor torque vs. speed curves

I have been trying to decide what version of the QS 4000W 205 V3 motor would be best for my EV application. Are you looking for the projected top speed on a bike or motorcycle? FWIW: A quick examination of the dyno data (10_205_55H_V3_72V_1321RPM.pdf) shows that the results are limited by the contr...
by teklektik
Apr 23, 2018 10:04 am
Forum: E-Bike Reviews & Testing
Topic: Small query re the CA setup utility
Replies: 2
Views: 54

Re: Small query re the CA setup utility

1. Is the CA setup facility unable to access more than 1 preset at a time? Console Setup only configures the current preset. Either go to the Presets and change Prst->CrntPrst or exit Setup and Hotswap to the desired preset. The Setup utility can configure all presets at any time - even presets tha...
by teklektik
Apr 21, 2018 12:11 pm
Forum: E-Bike General Discussion
Topic: DC-DC converter from 48V to 6V for E-bike light?
Replies: 12
Views: 223

Re: DC-DC converter from 48V to 6V for E-bike light?

So, what solution is better? ... I think the QSKJ isn't waterproof. Nope, it's not. You would need to box it. Depending on what other modules you might have that may or may not be an issue. On one of my bikes that supply lives in this little aluminum box with a strobe module and an ebrake-signal-to...
by teklektik
Apr 20, 2018 10:12 pm
Forum: E-Bike Technical
Topic: Torque arm options for these drop outs
Replies: 4
Views: 116

Re: Torque arm options for these drop outs

If that's an aluminum frame, I would put on the second TA... Anyhow, you could try flipping the axle TA piece over so it's pointing away from the stay, opposite from as shown. Then move the stay piece inside to the dropout side so it's over the dropout. I would add a couple of washers between the tw...
by teklektik
Apr 20, 2018 9:25 pm
Forum: E-Bike General Discussion
Topic: DC-DC converter from 48V to 6V for E-bike light?
Replies: 12
Views: 223

Re: DC-DC converter from 48V to 6V for E-bike light?

I use this for 16V lighting on a 52V bike but it will adjust down to your range as well.
Works nice.

DcDcConverter.png
DcDcConverter.png (63.61 KiB) Viewed 206 times

EM3EV:
https://em3ev.com/shop/dcdc-converter/

Ed Lyen:
https://endless-sphere.com/forums/viewtopic.php?t=21459
http://lyen.com/

or search: QS-4805CBD-3A
by teklektik
Apr 20, 2018 7:43 am
Forum: E-Bike Technical
Topic: Fitting PAS to square BB on road bike
Replies: 14
Views: 300

Re: Fitting PAS to square BB on road bike

Hey, that post above wasn't me (incase you thought it was) Whoa! You called that one exactly right - I confess I was surprised because you had said you were going with the chain ring mount - should have been a tipoff. But riding it last night felt great! Well, in any case - OW54 did a neat job and ...
by teklektik
Apr 19, 2018 7:17 pm
Forum: E-Bike Technical
Topic: Fitting PAS to square BB on road bike
Replies: 14
Views: 300

Re: Fitting PAS to square BB on road bike

Excellent!
That was certainly more of a project than you planned, but there's always something satisfying about cooking up a custom solution...
Enjoy your PAS!
:D
by teklektik
Apr 19, 2018 12:58 pm
Forum: E-Bike General Discussion
Topic: Clearance front motor hub and caliper
Replies: 9
Views: 186

Re: Clearance front motor hub and caliper

This is what is being proposed:

brakeMod.png
click to enlarge

You could also get a post-to-IS adapter, swap the caliper, and then add a couple of 6mm washers as spacers to move the caliper outward. Sort of a hack on a hack....
by teklektik
Apr 17, 2018 2:17 pm
Forum: E-Bike Non-hub Motor Drives
Topic: Throttle Behavior
Replies: 75
Views: 1873

Re: Throttle Behavior

...cut the well documented grey wire found on the four wire PAS connector within the controller. Splice a wire to each end of the cut grey wire ends and run these two wires to the throttle. Running a signal through a mechanical switch is workable but the failure mode for intermittent contact or bro...
by teklektik
Apr 17, 2018 10:35 am
Forum: E-Bike Technical
Topic: Installing PAS sensor on one-piece cranks - looking for ideas
Replies: 5
Views: 142

Re: Installing PAS sensor on one-piece cranks - looking for ideas

No problem at all. You can even stick them to the inner chain ring (or the bolts/arms if there are any on your rig) using epoxy or even just magnetically. The grade 52 magnets are quite fierce and will hold in place with great tenacity if your harvested magnets don't stay in place (see; https://www....
by teklektik
Apr 17, 2018 8:11 am
Forum: E-Bike Technical
Topic: Fitting PAS to square BB on road bike
Replies: 14
Views: 300

Re: Fitting PAS to square BB on road bike

I'm not dismissing any ideas right now, didn't fully understand yours / OW54 suggestions at first but now I get it. I think you have it - but just in case: A picture is worth... :) Stepped bits are available for cheap at Amazon, Harbor Freight, etc. Handy... When drilling you just need to clamp the...
by teklektik
Apr 16, 2018 1:34 pm
Forum: E-Bike Technical
Topic: Installing PAS sensor on one-piece cranks - looking for ideas
Replies: 5
Views: 142

Re: Installing PAS sensor on one-piece cranks - looking for ideas

Grin Tech PAS_12P, PAS_12P_Chr have basic physical designs that will probably address your needs. However, both these particular products have been customized to only work with a Cycle Analyst 3. If you are not interested in a CA3, you can likely get the original unmodified versions from other vend...
by teklektik
Apr 15, 2018 5:07 pm
Forum: E-Bike Technical
Topic: Fitting PAS to square BB on road bike
Replies: 14
Views: 300

Re: Fitting PAS to square BB on road bike

...D8veh over on Pedelecs suggested grinding off the tapered section from the inside of the crank arm. I wouldn't pursue that approach myself - that would be modding/weakening a major pedaling component to mount a little bit of plastic. If you really don't want to go for the drive side mod, then go...
by teklektik
Apr 15, 2018 12:44 pm
Forum: E-Bike Technical
Topic: Fitting PAS to square BB on road bike
Replies: 14
Views: 300

Re: Fitting PAS to square BB on road bike

Hi, trying to figure out how to fit PAS to my road bike project. ... Anything I've done wrong here? Yep - looks like it. The critical missing picture is one of the crank and BB before the installation. It looks like you sensor is too thick for the available BB shaft. I suspect that you have compres...
by teklektik
Apr 12, 2018 3:30 pm
Forum: E-Bike General Discussion
Topic: comparing ebike kits
Replies: 20
Views: 830

Re: comparing ebike kits

Please you make sure to use torque arms as catrike expedition has aluminum dropouts and without t-arms you will strip your drop outs. +1 on the TA's. You will also want to put a snug fitting washer on the inside of your dropouts on each side so the narrow motor shaft shoulder won't sink into the al...
by teklektik
Apr 12, 2018 1:45 pm
Forum: E-Bike General Discussion
Topic: comparing ebike kits
Replies: 20
Views: 830

Re: comparing ebike kits

...,I live in Fla. so terrain is flat, max speed about 20 to 25mph ,I weigh 172lbs, desire about 30 to 40 mi round trip , ...My trike is a Catrike Expedition with a 26" rear wheel ...You can get the Mac motor and all the other components from the place that has been selling the Mac motor for years ...
by teklektik
Apr 11, 2018 11:56 am
Forum: General Discussion
Topic: Unicycle
Replies: 1
Views: 94

Re: Unicycle

Justin's power unicycle....


by teklektik
Apr 11, 2018 11:42 am
Forum: E-Bike Technical
Topic: Troubleshoot Mac Motor
Replies: 26
Views: 499

Re: Troubleshoot Mac Motor

After testing, it was the yellow wire that indicated a problem. Following the testing on Grin, the multimeter doesn't change at all....it's stuck on 5.00. The kind of thing you are looking for isn't always obvious - a cracked solder joint can look just fine. Without knowing by your report that the ...
by teklektik
Apr 10, 2018 11:58 am
Forum: E-Bike General Discussion
Topic: Hearing protection while riding
Replies: 28
Views: 693

Re: Hearing protection while riding

180's behind-the-head Fleece Ear Warmer thingies in the winter.
Fit under helmet straps, balaclava, etc. and fold up for the pocket.
by teklektik
Apr 05, 2018 1:11 pm
Forum: E-Bike General Discussion
Topic: MAC 10T @ 36V vs 12T @ 48V??
Replies: 24
Views: 544

Re: MAC 10T @ 36V vs 12T @ 48V??

There have been a few offroad and rockcrawler wheelchair or handcycle projects here on ES. Multiple motors often played a role as a means to use conventional hubmotors in very slow speed situations simply because it splits the load and hence the heat issue. You friend's undertaking is not that new a...
by teklektik
Apr 04, 2018 5:13 pm
Forum: E-Bike Technical
Topic: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers
Replies: 122
Views: 3800

Re: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers

... And if 4 points of orientation aren't enough, then a pentagon, hexagon, heptagon or octagon could be used. :D Hmmm... where have we seen this? :D An early incarnation of the Grin Thru Axle hubmotor: grinMotorHexTorqueArmAttachment.jpg And the hexagonal shape on the end of the axle is for an int...
by teklektik
Apr 04, 2018 4:52 pm
Forum: E-Bike Technical
Topic: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers
Replies: 122
Views: 3800

Re: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers

Thinking back to AmpedBikes TAs - perhaps the skewing could be reduced if the inner edges of the U were shaped to engage a matching filler plate. Unlike the shaft, the TA parts are laser cut, so there are many shaping options for the serrations to minimize redirecting forces in undesirable directio...
by teklektik
Apr 04, 2018 10:52 am
Forum: E-Bike Technical
Topic: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers
Replies: 122
Views: 3800

Re: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers

But you can see that there is still some skewing on top and bottom of the 'U' as a result of twisting force at the 180 degree bend. Thinking back to AmpedBikes TAs - perhaps the skewing could be reduced if the inner edges of the U were shaped to engage a matching filler plate. Unlike the shaft, the...
by teklektik
Apr 01, 2018 4:19 pm
Forum: Motor Technology
Topic: Motors ARE Efficient at Low Throttle
Replies: 21
Views: 769

Re: Motors ARE Efficient at Low Throttle

We can always do it manually with multiple runs, the value of the computer is to do that for us. Quite obviously. These plots were done some time ago to address exactly the speed/efficiency relationships that are the topic of the thread today. It was easy to put them up to illustrate those ideas in...