Search found 30 matches

by cloudcover
Oct 08 2019 1:35pm
Forum: E-Bike General Discussion
Topic: Lowering shipping costs for Frey bikes...
Replies: 8
Views: 1618

Lowering shipping costs for Frey bikes...

Hello there! I'm really intrigued/interested by the new Frey CC bike , which looks to be a great commuter/city bike option with an excellent combination of hardware/components, etc. I'm fine with the price of the bike but it looks like it's a whopping $800 to ship to the U.S.! :shock: Do any of you ...
by cloudcover
Nov 14 2018 6:41pm
Forum: E-Bike Technical
Topic: CA3 - Config for equivalent of assist proportional to steepness of hill?
Replies: 0
Views: 308

CA3 - Config for equivalent of assist proportional to steepness of hill?

Hello! I have a bike with a rear hub motor, which I had been controlling with a half-twist throttle. That's more of a "manual" approach than I'd like -- and it's uncomfortable for longer rides. So I recently bought and installed the following items from Grin: (1) a PAS (cadence) sensor, (2) a Cycle ...
by cloudcover
Oct 11 2018 3:50pm
Forum: E-Bike General Discussion
Topic: Mounting and security options for rectangular battery...
Replies: 7
Views: 736

Mounting and security options for rectangular battery...

Hello! I have a Surly Big Dummy cargo bike with Xtracycle bags and a BMC rear hub motor. I recently bought a rectangular battery pack for it that's 324mm x 140mm x 80mm. I'm trying to figure out the best way to mount or house it and wanted to get ideas from the community. For now, I've placed the ba...
by cloudcover
Sep 09 2018 6:26pm
Forum: Battery Technology
Topic: Reputable sources for good value ebike batteries?
Replies: 3
Views: 513

Reputable sources for good value ebike batteries?

Hello! I'm looking to buy a battery pack for an ebike -- likely something in the 48V 14Ah range. I'm wary of just searching by price, since I don't want to get an inexpensive battery that's poorly made, doesn't work, etc. Can folks recommend a few/handful of battery pack suppliers that are generally...
by cloudcover
May 22 2013 2:11pm
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4575
Views: 823046

Re: Cycle Analyst V3 preview and first beta release

There is no means for the bike to 'know' how much power is required to accomplish the task, whether you are assisting or not. How does it know if adding 5 Amps or 50Amps of assist is doing the job? yeah, sorry, my question was quite poorly worded. maybe this will help. in thinking about it further,...
by cloudcover
May 13 2013 1:31pm
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4575
Views: 823046

Re: Cycle Analyst V3 preview and first beta release

hi there - not 100% sure this is the right place to post this question -- happy to receive a re-direct if appropriate. :) i've been using a throttle-controlled ebike for 2-3 years now and have been pretty happy with the experience for the most part. but since my goal is to use the motor just for ass...
by cloudcover
May 31 2012 1:19pm
Forum: E-Bike General Discussion
Topic: Any recent developments with torque-based controllers?
Replies: 1
Views: 245

Any recent developments with torque-based controllers?

Hi there - I posted an inquiry several months ago about this and was wondering if there might have been any developments in the meantime. Basically, I'm interested in putting together an ebike with a torque-sensing mechanism that'll modulate the power to a hub motor so I can limit the maximum amount...
by cloudcover
Mar 03 2012 1:46am
Forum: Battery Technology
Topic: Need help on re-wiring BMS without shocking myself!
Replies: 7
Views: 704

Re: Need help on re-wiring BMS without shocking myself!

no need for sorrow. their BMSs provide enuff of that. oh man...i'm getting a bad feeling about this based on all of the negative comments i'm hearing about their BMSs. :| but what did you do to the first one to damage it? the wiring was labeled in a confusing manner and so i inadvertently connected...
by cloudcover
Mar 03 2012 1:40am
Forum: Battery Technology
Topic: Need help on re-wiring BMS without shocking myself!
Replies: 7
Views: 704

Re: Need help on re-wiring BMS without shocking myself!

I never got on with the capacitor based bms from that joke called Eveassemble.....seemed to dump really high voltage (over 4volts) into the last cell for some reason when balancing. If you get stuck order a bms from Cellman, I have had no problem with over 10 of them so far....really easy to wire u...
by cloudcover
Mar 02 2012 12:20pm
Forum: Battery Technology
Topic: Need help on re-wiring BMS without shocking myself!
Replies: 7
Views: 704

Re: Need help on re-wiring battery pack without killing myse

not even sure what you are asking if they sent you directions. do you think their directions are wrong? my mistake for not making my question more clear...apologies. my question is simple, really. for now, i'm planning to use the same wiring they supplied but just swap out the old (nonfunctional) b...
by cloudcover
Mar 02 2012 12:43am
Forum: Battery Technology
Topic: Need help on re-wiring BMS without shocking myself!
Replies: 7
Views: 704

Need help on re-wiring BMS without shocking myself!

hi there - long story short, i bought a battery system consisting of two separate battery packs and one capacitor bms. the bms failed so i need to swap out the old one with a new one (for now i'm going to use the existing wiring). does it matter what order i disconnect and/or reconnect the wires? th...
by cloudcover
May 04 2011 11:12pm
Forum: E-Bike Technical
Topic: Looking for help designing torque-based throttle alternative
Replies: 35
Views: 4845

Re: Looking for help designing torque-based throttle alterna

Proper torque control would give you the 'bionic leg' feel, where motor torque boost is directly proportional to pedal torque - pedal harder and you get more torque boost, pedal less hard and you get less torque boost. This would feel pretty natural and allow the motor to try and run at a speed tha...
by cloudcover
May 04 2011 1:40pm
Forum: E-Bike General Discussion
Topic: Kalkhoff versus Bionx for hill climbing help...
Replies: 6
Views: 1572

Kalkhoff versus Bionx for hill climbing help...

hi folks - i have a throttle-based hub motor ebike, with which i'm happy. i'd like to buy another ebike for my wife to use. she doesn't want to deal with throttle control and wants something more automated. after a bunch of research, it seems that kalkhoff and bionx might be the two best options out...
by cloudcover
Mar 03 2011 4:55pm
Forum: General Discussion
Topic: need advice on lipo or lifepo4 for cargo bike...
Replies: 18
Views: 2069

Re: need advice on lipo or lifepo4 for cargo bike...

okay, i think i'm willing to go the lipo route. but, i'm not particularly handy in terms of wiring, soldering, attaching connectors, etc. is there a vendor (or individual) who, in exchange for a reasonable fee, could build the battery system for me? i'd rather pay someone who's knowledgeable and exp...
by cloudcover
Feb 23 2011 12:37pm
Forum: General Discussion
Topic: need advice on lipo or lifepo4 for cargo bike...
Replies: 18
Views: 2069

Re: need advice on lipo or lifepo4 for cargo bike...

thanks, dogman, that's helpful. so if i'm interested in a simple (though perhaps more expensive) 48v15aH system, would i buy 6 of the 6s5aH lipo batteries, put 2 of them in series to create a 12s5aH subpack and then put 3 of those 12s5aH subpacks in parallel to create a 12s15aH final pack? and if th...
by cloudcover
Feb 20 2011 10:47pm
Forum: General Discussion
Topic: need advice on lipo or lifepo4 for cargo bike...
Replies: 18
Views: 2069

Re: need advice on lipo or lifepo4 for cargo bike...

thanks for all of the helpful responses, folks! but, as is often the case, the additional information has created additional questions. :) 1. i'm not really concerned with speed but rather am more concerned with how long i can ride. so am i correct in thinking that total energy capacity is more impo...
by cloudcover
Feb 16 2011 2:27pm
Forum: General Discussion
Topic: need advice on lipo or lifepo4 for cargo bike...
Replies: 18
Views: 2069

need advice on lipo or lifepo4 for cargo bike...

hi folks - i have a surly big dummy cargo bike to which i've mounted a bmc v2-t motor and an infineon controller. i'd been running it with a 36v10ah lifepo4 battery that i had from a previous build and it mostly worked fine. but i've now sold that battery because i was interesting in upgrading to so...
by cloudcover
Oct 18 2010 11:27pm
Forum: E-Bike Technical
Topic: Looking for help designing torque-based throttle alternative
Replies: 35
Views: 4845

Re: Looking for help designing torque-based throttle alterna

Say you have a motor capable of 20mph at full throttle and you want to cruise on the flat at 15mph with no wind. This needs a motor rpm of 75%, so the controller throttle input needs to be 75% of maximum in order to drive the motor fast enough. This means that you need 75% of the maximum output fro...
by cloudcover
Oct 17 2010 10:37pm
Forum: E-Bike Technical
Topic: Looking for help designing torque-based throttle alternative
Replies: 35
Views: 4845

Re: Looking for help designing torque-based throttle alterna

You still need to find a way to drive the controller in torque/power mode, rather than in speed mode, so whatever sensor you choose to use, you still need to find a way to adapt the controller. Controllers are normally driven by a voltage signal that directly controls the voltage to the motor (by v...
by cloudcover
Oct 12 2010 11:03am
Forum: E-Bike Technical
Topic: Looking for help designing torque-based throttle alternative
Replies: 35
Views: 4845

Re: Looking for help designing torque-based throttle alterna

I've just made a prototype torque throttle adapter, which uses current feedback from the shunt in the controller to determine motor torque (motor torque is linearly proportional to motor current). Jeremy that seems like a clever approach; but also, as you mention, it seems pretty involved. if somet...
by cloudcover
Oct 12 2010 1:14am
Forum: E-Bike Technical
Topic: Looking for help designing torque-based throttle alternative
Replies: 35
Views: 4845

Looking for help designing torque-based throttle alternative

hi folks - thanks to the great information on this forum, i have an ebike setup that i absolutely love and that's dramatically increased how frequently i ride my bike. it's a surly big dummy bike with the xtracycle cargo kit and i'm coupling that with a bmc v2-t motor, an infineon controller, and a ...
by cloudcover
Jun 30 2010 6:43pm
Forum: E-Bike General Discussion
Topic: Advice on battery pack for BMC V2-T system...
Replies: 0
Views: 222

Advice on battery pack for BMC V2-T system...

Hello there - I'm in the process of putting together a cargo bike using a BMC V2-T rear hub motor and was hoping to get some advice on a battery pack to use with that. I was told that the V2-T motor benefits from a 48V pack, so I figured I'd go that route. I don't need tons of range, so I thought ma...
by cloudcover
Sep 24 2009 10:08pm
Forum: E-Bike General Discussion
Topic: Need advice putting together bike that's good on hills...
Replies: 35
Views: 3388

Re: Need advice putting together bike that's good on hills...

cloudcover, you make any decisions yet? i'm just curious to hear where you're at now... hi gc - thanks for asking. well, i'm not fully there yet but i'm getting closer. :) i think i'm going to split up my functionality into two bikes: (a) a surly big dummy with the xtracycle attachments for going t...
by cloudcover
Sep 12 2009 7:09pm
Forum: E-Bike General Discussion
Topic: Need advice putting together bike that's good on hills...
Replies: 35
Views: 3388

Re: Need advice putting together bike that's good on hills...

Beating the horse to death, Cheaper steel frame. Or at least some steel forks on the bike. With a steel frame, ya can bend out the rear if it needs it. You should be able to get one cheap on the used market. hmmm...okay, i'm warming to the option of getting a steel frame (a bit). would something li...
by cloudcover
Sep 11 2009 5:24pm
Forum: E-Bike General Discussion
Topic: Need advice putting together bike that's good on hills...
Replies: 35
Views: 3388

Re: Need advice putting together bike that's good on hills...

But still I'm a bit confused here. Why are you riding a nice light weight bike and needing a monster motor? It's either you don't have the cardiovascular capacity to ride the bike by itself on flat ground or the hills in your area against are like 22% grade, which I highly doubt unless of course yo...