Search found 211 matches

by joe tomten
May 16 2014 4:45pm
Forum: General Discussion
Topic: New job with a Tough commute.
Replies: 27
Views: 1356

Re: Tough commute.

Smart move on Jasons part.

Over the years i've been mostly lurking here - no single person has more effectively comunicated the basic concepts of ebiking more consistantly, reliably and congenially than you have.

YES. A well deserved opportunity.
by joe tomten
Apr 26 2014 1:41pm
Forum: Items for Sale - New
Topic: Replacement motor axles
Replies: 83
Views: 9004

Re: Replacement motor axles

Yup.

pretty much.
by joe tomten
Apr 26 2014 7:30am
Forum: Items for Sale - New
Topic: Replacement motor axles
Replies: 83
Views: 9004

Re: Replacement motor axles

I'll draw up the axle. The chassis connection I havn't worked out yet. Am thinking of a dual-a arm front suspension, and have obtained these plans to work off of : http://www.badlandbuggy.com/plans_st3.html http://i234.photobucket.com/albums/ee166/cubphotojoe/badbug2frontduala.jpg But the hub motor ...
by joe tomten
Apr 25 2014 2:47pm
Forum: Items for Sale - New
Topic: Replacement motor axles
Replies: 83
Views: 9004

Re: Replacement motor axles

For that 9C: Looking here : http://www.microbluebearings.com/pages/METRIC-SIZE-CHARTS.html it looks like a 6003 bearing will bring me up to 17mm journal size still fitting in the 35mm housing. the 6003 seems common enough; though is the extra 2mm enough to warrant the effort ? I have not found any T...
by joe tomten
Apr 25 2014 7:06am
Forum: Items for Sale - New
Topic: Replacement motor axles
Replies: 83
Views: 9004

Re: Replacement motor axles

the 9C bearing is a 6202 bearing.

journal diam: 15mm
OD : 35mm
width: 10mm
by joe tomten
Apr 17 2014 6:42pm
Forum: Items for Sale - New
Topic: Replacement motor axles
Replies: 83
Views: 9004

Re: Replacement motor axles

Do you think it is possible to do a 9c as a single sided mount axle?

I have a few motors here that I'd like to use for a tadpole trike. But the front 2 motors really want to have a single attachment to the double a- arm suspension.
by joe tomten
Dec 11 2013 11:02pm
Forum: E-Bike Build Threads / Photos & Video
Topic: wallmart fatty
Replies: 58
Views: 7385

Re: wallmart fatty

Being that I cant afford a bafang bbs02 just now -- and having a couple of spare motors and controllers hanging about --- I'm gonna try to do a dual motor build on one of these. The hubs motors are both lowish power things. DD 2807 hub on the rear, and a geared hub on the front. 16s lifepo. In anoth...
by joe tomten
Nov 23 2013 6:56pm
Forum: E-Bike Build Threads / Photos & Video
Topic: wallmart fatty
Replies: 58
Views: 7385

Re: wallmart fatty

does anyone know if the gng mid:-drive kit http://www.gngebike.com/450w-brushless-mud-guard
is a direct fit for the walmart fatty?

If so I will do one.

*edit* what is the bottom bracket size of the mongoose beast.?
by joe tomten
Nov 04 2013 2:32pm
Forum: E-Bike General Discussion
Topic: R.I.P. le Béte
Replies: 40
Views: 3116

Re: R.I.P. le Béte

I'd try welding it back together with an oxy/acetylene torch and maybe steel plates sandwiching either side of the break.

Lace up a new rear wheel and keep on going.
by joe tomten
Sep 22 2013 11:44am
Forum: Battery Technology
Topic: "Zephyr" - Finally, the "v4" Fechter/Goodrum/Hecker BMS...
Replies: 951
Views: 121932

Re: "Zephyr" - Finally, the "v4" Fechter/Goodrum/Hecker BMS.

I have one of the V4. unopened board available if someone wants it.
by joe tomten
Sep 03 2013 2:55pm
Forum: E-Bike Reviews & Testing
Topic: My Eko Bike
Replies: 29
Views: 6430

Re: My Eko Bike

you are looking for charger that charges to 41 or 42 volts. These are Lithium ion batteries and 10s (in series) this guy would work. http://www.amazon.com/VeriBest-36V-2A-Smart-Charger/dp/B007NHWDC6/ref=sr_1_7?s=automotive&ie=UTF8&qid=1378238038&sr=1-7&keywords=veribest+charger just make sure you sp...
by joe tomten
Apr 11 2013 4:06pm
Forum: Battery Technology
Topic: lifepo4 cell group reverses voltage?
Replies: 5
Views: 374

Re: lifepo4 cell group reverses voltage?

thanks dogman,

chagrined i am to be told "well known" when i was hoping "merely suspected"

Time to reconfigure all my balance leads to some varient of Dr. BASS's db25 balance connector situation.
by joe tomten
Apr 10 2013 9:06pm
Forum: Battery Technology
Topic: lifepo4 cell group reverses voltage?
Replies: 5
Views: 374

Re: lifepo4 cell group reverses voltage?

generic 26650's i got used a couple of years ago. been good in service. not high c cells. Yes, will have to cut in a new parallell group. I put this pack together from other funky packs - so this isn't new. Just a pain. i didn't leave the controller on. cell groups 2 . . 16 remained nearly fully cha...
by joe tomten
Apr 09 2013 10:06pm
Forum: Battery Technology
Topic: lifepo4 cell group reverses voltage?
Replies: 5
Views: 374

lifepo4 cell group reverses voltage?

Just hauled out one of my bikes that has a 12s lifepo4 battery connected to a signal lab bms (red blinkey led type).

The first cell group is MINUS 1.5v, and all the others around Positive 3.2 - 3.3 v.

how can this happen?
by joe tomten
Aug 05 2012 12:54am
Forum: E-Bike Technical
Topic: grunting at start - lyen sensorless
Replies: 9
Views: 2022

Re: grunting at start - lyen sensorless

Well I can't discount the melted wire at the solder joint inside the motor possibility. But the reason I laced up this new motor (with bad halls) i had on hand was because I'd messed up wires at the axle just like you indicated. Xtracycle bag flopping over the unprotected wire at the axle.

duh.
by joe tomten
Aug 04 2012 6:29am
Forum: E-Bike Technical
Topic: grunting at start - lyen sensorless
Replies: 9
Views: 2022

Re: grunting at start - lyen sensorless

I seriously checked each and every connnection. Funny thing is that if i baby the throttle on start up it runs almost normally. But I jam the throttle open like usual, and it gags. Especially with 2 kids on the back. It also gags when I change grade from flat - to up hill. I'm suspecting it is somet...
by joe tomten
Aug 02 2012 3:22pm
Forum: E-Bike Technical
Topic: grunting at start - lyen sensorless
Replies: 9
Views: 2022

grunting at start - lyen sensorless

I have a lyen 6 fet mini monster sensorless controller that I've been using for over a year . As of yesterday it has starting grunting and hammering the motor on start up, but once up to speed a bit - is still working fine. I've checked all the connections and they are good. Any ideas on what this m...
by joe tomten
Jul 04 2012 11:01am
Forum: E-Bike General Discussion
Topic: Has anyone used front rack/boxes to balance battery w/ hub?
Replies: 20
Views: 1385

Re: Has anyone used front rack/boxes to balance battery w/ h

BMX style handle bars work pretty well as a mounting structure for an ammo-box battery. I mount a piece of 1/2" plywood to the front of my handle bar w/ u-bolts and just use a small ratchet strap to hold it there, whether it's the ping 48v15ahr or some other rectangular object. takes a little gettin...
by joe tomten
Jun 13 2012 11:36am
Forum: Battery Technology
Topic: Balancing Batteries - how to?
Replies: 47
Views: 1207

Re: Balancing Batteries - how to?

"Charging cells with individual chargers":

Image
by joe tomten
Jun 12 2012 10:20pm
Forum: E-Bike Reviews & Testing
Topic: xtracycle freeloader review, from an eBike perspective.
Replies: 32
Views: 8211

Re: xtracycle freeloader review, from an eBike perspective.

I have an xtracycle attached to an electra townie that i use as my commuter/work vehicle. Works great. Carry 2 kids for 20 miles. Carry 150 lbs of feed. Carry any gear that i need to carry. Carry 2 pallets home if i want to. With the crank forward townie low COG format - the whole rig is extremely s...
by joe tomten
May 28 2012 8:13am
Forum: E-Bike Technical
Topic: Lacing a HT into a 26" rim - flexed spokes - problem solved
Replies: 11
Views: 793

Re: Lacing a HT into a 26" rim - flexed spokes - problem?

You might consider buying a round file whose diameter is a bit smaller than the spoke hole, then - while leaving the whole wheel strung together - remove spokes one by one and run that file for a few strokes through the nipplehole. You can sight a line down the direction of the spoke engagement with...
by joe tomten
May 21 2012 7:42am
Forum: E-Bike General Discussion
Topic: 400W for 12mph: Why is my bike so inefficient?
Replies: 76
Views: 2315

Re: 400W for 12mph: Why is my bike so inefficient?

& if nothing is getting hot, then power isn't being wasted and we are back to being suspicious about the Rshunt number programmed into the cycle analyst giving the overstated power usage value.
by joe tomten
May 15 2012 1:00pm
Forum: E-Bike General Discussion
Topic: Preparing for long slow tour
Replies: 32
Views: 1398

Re: Preparing for long slow tour

I made up a pair of xlr to anderson connectors that lets me convert the chargers xlr output to the anderson discharge plugs on the battery. That way i can use the charger in any location (and for different batteries i have hanging about). be sure to use your volt meter to check polarity before makin...
by joe tomten
May 10 2012 2:50pm
Forum: E-Bike General Discussion
Topic: Preparing for long slow tour
Replies: 32
Views: 1398

Re: Preparing for long slow tour

You could just get a second charger for your ping and plug that in where the controller gets fed from. I often do this with both the signallab v1 and v2 types of bms's. Just don't walk away for too long - because the bms can't shut off that second charger. an hour of charging mid-day - say 6 amphrs ...