Search found 257 matches

by Drum
May 07 2018 1:24pm
Forum: EBike Non-hub Motor Drives
Topic: Bosch mid drive with vesc controller
Replies: 41
Views: 10339

Re: Bosch mid drive with vesc controller

Great news! I'm glad it has worked out.
That's a fairly narrow voltage range for zero to full throttle, but as long as it is stable and repeatable you should be able to work with it.
Hope it rides great and can handle a bit more power than originally without overheating too much!
Dave
by Drum
May 02 2018 6:43pm
Forum: EBike Non-hub Motor Drives
Topic: 02 Jamis Dakar Comp mid drive choice
Replies: 16
Views: 3008

Re: 02 Jamis Dakar Comp mid drive choice

Hi Mike, Re the throttle behavior on the BBS02.. it seems lots of people are having similar issues, especially on motors with recent controller firmware, and several people are working on solutions. Check out the thread called "Throttle Behavior" on ES, E-Bike Non-hub Motor Drives. Other t...
by Drum
May 01 2018 4:14pm
Forum: EBike Non-hub Motor Drives
Topic: Throttle Behavior
Replies: 129
Views: 13335

Re: Throttle Behavior

Relating to this problem, but using programming rather than external electronics: I found this in PacoMarkE ' s well documented thread about his BBS02 commuter bike build: "Throttle. The throttle was acting like an on/off switch instead of a graduated response. I read up a little and changed se...
by Drum
Apr 26 2018 3:06am
Forum: EBike Non-hub Motor Drives
Topic: Bosch mid drive with vesc controller
Replies: 41
Views: 10339

Re: Bosch mid drive with vesc controller

I am not an expert in this, but I know that some strain gauges and Hall sensors output voltages between 1 & 4 volts through their range, and this matches Hall effect throttles, so it is at least possible that the torque sensor output is already usable, at least for a controller where you can sel...
by Drum
Apr 22 2018 10:14pm
Forum: EBike Non-hub Motor Drives
Topic: Bosch mid drive with vesc controller
Replies: 41
Views: 10339

Re: Bosch mid drive with vesc controller

Ok, seems like a dead end for that particular system using throttle. That's a shame. Did you get any feel for the power the motor / controller combination could produce without overheating etc? Any chance of picking up the torque sensor output and using that as a "throttle" signal into the...
by Drum
Apr 18 2018 9:21pm
Forum: Motor Technology
Topic: TSDZ2 mid drive with 860C, 850C or SW102 displays only -- Flexible OpenSource firmware (Casainho code only)
Replies: 6506
Views: 481442

Re: TSDZ2 mid drive -- Flexible OpenSource firmware for TongSheng TSDZ2 mid drive motor

Hi Casainho, watching with interest! FWIW: Looks like someone else is offering updated firmware: https://www.youtube.com/watch?v=tj2aYtma64o Obviously a "how to load the firmware" instruction video for people who have bought his disc. Not very informative, but may be of interest. I couldn'...
by Drum
Apr 18 2018 2:14pm
Forum: EBike Non-hub Motor Drives
Topic: Bosch mid drive with vesc controller
Replies: 41
Views: 10339

Re: Bosch mid drive with vesc controller

Hi Mechhead, Sounds an interesting project! I had often wondered about using different controllers on the "packaged" mid-drives, so I will be keen to see what results you have. Are you planning to run it throttle-only, or are you going to try and use the torque sensor signal? I would expec...
by Drum
Apr 16 2018 3:55pm
Forum: EBike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5397
Views: 605489

Re: Sur-Ron - New Mid drive Bike

Hi JRH, Re your idea: "I've been considering how to implement a mode of throttle that would limit speed near 30mph on flat, but still let it rev out on downhills and not bog down going uphills. Seems that an inclinometer would be the magic component to meet the law's criteria on flat ground whi...
by Drum
Apr 04 2018 11:37pm
Forum: EBike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 8316
Views: 907920

Re: New "TSDZ2 Torque Sensor Central Motor"

@casainho, The idea of being able to teach the controller new tricks is really interesting, and could allow users to tune the system to suit their riding style and conditions.. a real bonus. As far as the inclimometer is concerned, just remember that acceleration and braking will be read as a change...
by Drum
Mar 11 2018 3:16am
Forum: EBike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 8316
Views: 907920

Re: New "TSDZ2 Torque Sensor Central Motor"

Jbalat, Thank you very much for the strip-down videos you have made on the TSDZ2 motor unit.
Not difficult, but it helps so much to know in advance what you will find, what tools are needed, and the sequence of work.
Much appreciated.
Dave
by Drum
Mar 09 2018 1:47pm
Forum: EBike Non-hub Motor Drives
Topic: Quiet Motors
Replies: 4
Views: 874

Re: Quiet Motors

Find this thread here on Endless Sphere: https://endless-sphere.com/forums/viewtopic.php?f=28&t=83450 A BBSHD matched with a "Phaserunner" Sinewave controller. Looks as though it might do what you are hoping for. Regardless of what motor you choose, it should run quieter using a Sinewa...
by Drum
Mar 04 2018 2:40pm
Forum: EBike Non-hub Motor Drives
Topic: BBSHD- the final answer to "legal" ebikes
Replies: 10
Views: 1842

Re: BBSHD- the final answer to "legal" ebikes

One of the main reasons the manufacturers of e-bikes offer underpowered systems is the legislation in the various countries where they are manufactured and sold, that restricts the maximum power allowed. The manufacturers have to offer bikes that are legal, so not all the blame lies with them. Part ...
by Drum
Mar 02 2018 4:27pm
Forum: EBike Non-hub Motor Drives
Topic: Mongoose CX24V450 with 2500 watt L-R Small Block
Replies: 71
Views: 12730

Re: Mongoose CX24V450 with 2500 watt L-R Small Block

Hi Mike, Yes, most of us have done a project like that.. I picked up a Rockshox Monarch air shock at 165mm eye-to-eye to upgrade my daughter's mountainbike a while ago, and it is a great little shock. We found another, either 150 or 155mm for a friend's Mongoose mountainbike also, so the shorter sho...
by Drum
Feb 28 2018 5:34pm
Forum: E-Scooter and Motorcycle Build Threads
Topic: Aprilia E-sxv 50kw
Replies: 44
Views: 18692

Re: Aprilia E-sxv 50kw

Hi Try-all, I really like the look of your project.. should be awesome to ride once you get it finished. One comment though: your battery box blocks all direct airflow to the motor, and even the mounting plates enclose the motor to the sides, so there will not be much airflow around the motor. It mi...
by Drum
Feb 25 2018 2:18pm
Forum: EBike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 8316
Views: 907920

Re: New "TSDZ2 Torque Sensor Central Motor"

Hi Wgtnpete, Looks like that chainring is high quality, but have no experience with it myself. Narrow-wide chainrings do actually seem to keep the chain on the chainring well, and look after the chain better also. Since I swapped to a narrow-wide on my mountainbike I have not had the chain drop off ...
by Drum
Feb 24 2018 4:10pm
Forum: EBike Non-hub Motor Drives
Topic: TSDZ2 Sensor Adjustments?
Replies: 1
Views: 417

Re: TSDZ2 Sensor Adjustments?

Another possibility is mechanical friction, either inside the motor unit or external. I read somewhere that another user of the TSDZ2 found that the inside of the crank arms rubbed on the side of the motor casing. He removed the crank arms, ground a couple of mm of metal off the inside face and re-i...
by Drum
Feb 08 2018 2:31pm
Forum: EBike Non-hub Motor Drives
Topic: Kuberg Freerider Extended Swingarm Project
Replies: 162
Views: 34193

Re: Kuberg Freerider Extended Swingarm Project

Hi Skeet, If there is continuity between battery negative and hall sensor negative, that is good.. connect the negative of the 9V battery to either the battery negative or the hall negative, and the +9V of the battery to the hall sensor supply Positive. (You will have to disconnect the hall sensor +...
by Drum
Feb 07 2018 2:51pm
Forum: EBike Non-hub Motor Drives
Topic: izip my1018z motor question
Replies: 4
Views: 589

Re: izip my1018z motor question

Hi Roadstar, I don't have personal experience with that particular motor, but I have noticed with other brushed motors in the past that sometimes the brushes make a noise when the commutator is turned in one direction but not the other. Is the motor that makes the noise new or used? Hard to judge wi...
by Drum
Jan 18 2018 7:08pm
Forum: EBike Non-hub Motor Drives
Topic: How to drive ebike using outrunner?
Replies: 6
Views: 1355

Re: How to drive ebike using outrunner?

Several people have put a second drive chain on the left side of the bike, driving from the motor to a sprocket mounted to the 6 bolt holes for the disc brake. Obviously the sprocket has to be on a flange that moves it inward slightly, and the disc ends up moving outwards slightly, so it would depen...
by Drum
Jan 18 2018 5:28pm
Forum: Items for Sale - New
Topic: FREY eMTB with Bafang m600 is developing with your ideas!
Replies: 441
Views: 47210

Re: FREY eMTB with Bafang m600 is developing with your ideas!

"I would be curious to know if the 148mm x 12mm boost spacing and axles are part of the reason to deal with side force? I only ask because I noticed a significant difference in stiffness when I went to a 140mm x 12mm rear frame on my Ellsworth Epiphany." Hi DDFred, I guess as tyres get wid...
by Drum
Jan 17 2018 3:06pm
Forum: Items for Sale - New
Topic: FREY eMTB with Bafang m600 is developing with your ideas!
Replies: 441
Views: 47210

Re: FREY eMTB with Bafang m600 is developing with your ideas!

When designing the rear suspension, keep the bearings for the main swing arm as wide apart as possible, to reduce the maximum force on them and keep the back end as stiff as possible. Three reasons: -The chain forces on e-bikes are greater than normal bikes, and there are reports of frames bending s...
by Drum
Jan 10 2018 4:11pm
Forum: Items for Sale - New
Topic: FREY eMTB with Bafang m600 is developing with your ideas!
Replies: 441
Views: 47210

Re: FREY eMTB with Bafang m600 is developing with your ideas!

Hi Fred,
Could you please copy the website address for the G521 kit and post it? I can't find any webpage showing the unit or kit for sale..

Thanks
Dave
by Drum
Jan 09 2018 3:53pm
Forum: Items for Sale - New
Topic: FREY eMTB with Bafang m600 is developing with your ideas!
Replies: 441
Views: 47210

Re: FREY eMTB with Bafang m600 is developing with your ideas!

Looking at the Bafang website, they offer a mounting bracket for the m500 & m600 motors: http://www.bafang-e.com/en/components/component/accessoires/fp-g520.html This looks like the part that surrounds / mounts the motor and forms the bottom of the frame on the blue bike shown a few posts ago. I...
by Drum
Jan 07 2018 3:27pm
Forum: Items for Sale - New
Topic: FREY eMTB with Bafang m600 is developing with your ideas!
Replies: 441
Views: 47210

Re: FREY eMTB with Bafang m600 is developing with your ideas!

"What other models have you read about that get good reviews?" Several of the bikes I have read about get good overall reviews, but the one that seems to get the best comments ("Climbs well, descends well, great fun to ride, no weaknesses, has agility and stability" type of comme...
by Drum
Jan 07 2018 2:41am
Forum: Items for Sale - New
Topic: FREY eMTB with Bafang m600 is developing with your ideas!
Replies: 441
Views: 47210

Re: FREY eMTB with Bafang m600 is developing with your ideas!

Geometry: The Torbo Levo gets good reviews for its handling, but there are others that get better, so here's my take on the geometry. Head tube angle: between 66 & 67 degrees Seat tube angle: 75 degrees Chainstay length (Bottom Bracket to rear axle): 440mm or as close as you can get to that figu...