Search found 1429 matches

by monster
Sep 15 2020 1:34pm
Forum: E-Bike General Discussion
Topic: EMCT1441 how to connect this controller?
Replies: 5
Views: 179

Re: EMCT1441 how to connect this controller?

It says vcc near the positive power lead
by monster
Sep 14 2020 6:20pm
Forum: E-Bike General Discussion
Topic: EMCT1441 how to connect this controller?
Replies: 5
Views: 179

EMCT1441 how to connect this controller?

Hi Can't figure this one out. Its brushless. It has 3 phase and 5 wire hall sensors all normal so far... But Can't get it to fire up? There are 3 other connectors Black/white which i thought was brake or on switch. Red/black/green/yellow which i thought was throttle plus brake but could be pedal sen...
by monster
Aug 02 2020 4:20am
Forum: E-Bike General Discussion
Topic: crack in frame. salvageable?
Replies: 20
Views: 1482

Re: crack in frame. salvageable?

If a magnet sticks to it, its steel. Otherwise its aluminum. If its steel, you might be able to slide a thick box section down the tube. Then you can weld it without worrying about blowing holes through it. You need to cut the folding mechanism off first. Test the frame by jumping up and down on it....
by monster
Aug 01 2020 9:52am
Forum: Battery Technology
Topic: Safety Power Switch suggestion
Replies: 16
Views: 722

Re: Safety Power Switch suggestion

I see no padding in these pics. Without foam padding the battery will bang into the frame and errode the cell insulation causing a short circuit through the frame. And fire
by monster
Aug 01 2020 9:43am
Forum: E-Vehicles General Discussion
Topic: BATTERY FIRE
Replies: 10
Views: 1584

Re: BATTERY FIRE

We need more info to even guess the cause of the fire.

What battery?
BMS?
Was it Charging?
How was it mounted?
Hard case?
by monster
Aug 01 2020 9:21am
Forum: E-Bike Technical
Topic: can I change a cheapo BMS to be 4.1 volts / cell?
Replies: 14
Views: 463

Re: can I change a cheapo BMS to be 4.1 volts / cell?

It's worse than that. The cheap bms just cut off when first cell reaches 4.3v. There is no cell balance.
They are just to prevent fire.
by monster
Aug 01 2020 7:33am
Forum: E-Bike General Discussion
Topic: How much power is too much power? (hub motor)
Replies: 42
Views: 1669

Re: How much power is too much power? (hub motor)

When there is so much power that even the slightest touch of the throttle sends you on your back.
by monster
Jul 29 2020 4:04am
Forum: E-Bike General Discussion
Topic: UK will be electric bike capital of the world!
Replies: 43
Views: 1443

Re: UK will be electric bike capital of the world!

Maybe now that boris is in charge it will be different?
He rides bikes
by monster
Jul 26 2020 6:30pm
Forum: E-Bike General Discussion
Topic: Why no V-brakes on Fat Bikes?
Replies: 32
Views: 1278

Re: Why no V-brakes on Fat Bikes?

Rim brakes are super annoying because there is so much to adjust. disc brakes are fixed and cant rotate hitting the tyre like rim brakes do. Rim brakes need to be adjusted on so many axis to kiss the rim e.g. up/down, rotationally, in/out. They have to be reguarly re-adjusted cos the adjustment bits...
by monster
Jul 25 2020 3:56am
Forum: E-Bike Technical
Topic: Ultra motor: What is this hub motor? Is it broken? How do i open it?
Replies: 13
Views: 428

Re: Ultra motor: What is this hub motor? Is it broken? How do i open it?

Yes sorry mate. I think i got a bit carried away. Looks like i will have to open it up after all.
by monster
Jul 24 2020 2:11pm
Forum: E-Bike Technical
Topic: Lady needs a little help with battery build
Replies: 15
Views: 648

Re: Lady needs a little help with battery build

Looking at your pictures, the pack seems very close to the frame. I would be a little worried about the battery insulation being worn away by the frame banging into it on the bumps.

You could get have a meltdown if it shorts out!
by monster
Jul 24 2020 12:36pm
Forum: E-Bike Technical
Topic: Ultra motor: What is this hub motor? Is it broken? How do i open it?
Replies: 13
Views: 428

Re: Ultra motor: What is this hub motor? Is it broken? How do i open it?

Ah its not shorted there is resistance across the power leads
by monster
Jul 24 2020 12:21pm
Forum: E-Bike Technical
Topic: Ultra motor: What is this hub motor? Is it broken? How do i open it?
Replies: 13
Views: 428

Re: Ultra motor: What is this hub motor? Is it broken? How do i open it?

Oh and there is a broken blue wire at the axle entrance too?
by monster
Jul 24 2020 12:20pm
Forum: E-Bike Technical
Topic: Ultra motor: What is this hub motor? Is it broken? How do i open it?
Replies: 13
Views: 428

Re: Ultra motor: What is this hub motor? Is it broken? How do i open it?

So im guessing red is +5v, yellow is ground, and brown and orange are sense for throttle or pas?

What do you think?
by monster
Jul 24 2020 11:16am
Forum: E-Bike Technical
Topic: Ultra motor: What is this hub motor? Is it broken? How do i open it?
Replies: 13
Views: 428

Re: Ultra motor: What is this hub motor? Is it broken? How do i open it?

so those 4 small wires im guessing are for a throttle or PAS?
maybe its working but i just didn't supply the right throttle input to make it spin?


This is a weird bike cos it had a massive controller shapped thing in the frame too.
and one in the motor it seems...
by monster
Jul 24 2020 10:48am
Forum: E-Bike Technical
Topic: Ultra motor: What is this hub motor? Is it broken? How do i open it?
Replies: 13
Views: 428

Ultra motor: What is this hub motor? Is it broken? How do i open it?

Hi Bet you've never seen a hub motor like this before? I looks like a bruched motor with temperature sensors. but when i connect it to a battery it doesn't move just draws a big current. so i figured it must be shorted, but how do i open it? there are no bolts to undo? i tried taking half the spokes...
by monster
Jul 21 2020 4:06pm
Forum: E-Bike Technical
Topic: controller with computer on-switch won't switch on?
Replies: 0
Views: 300

controller with computer on-switch won't switch on?

Hi is there a way to by-pass a computer controled on switch to switch on with a normal switch? its the 5 wire display shown. I can't get the bike to switch on and i've tried a controller swap with a duplicate controller sent from the manufacturer. I've checked the throttle, halls and battery all ok....
by monster
Jul 20 2020 5:41pm
Forum: E-Bike General Discussion
Topic: any good 7s bms recommendations?
Replies: 8
Views: 246

Re: any good 7s bms recommendations?

Maybe all the short circuit tests i did killed it?
by monster
Jul 20 2020 5:05pm
Forum: E-Bike General Discussion
Topic: any good 7s bms recommendations?
Replies: 8
Views: 246

Re: any good 7s bms recommendations?

Yer im just using that to test this BMS.

I've tested another one now and that one was ok. Cut off at 4.3v

So maybe i just broke the last one as i was removing it from the pack to test?
-i didn't want to wreck a good pack just to test the bms. So i stuck it on a week battery.
by monster
Jul 20 2020 4:56pm
Forum: E-Bike General Discussion
Topic: any good 7s bms recommendations?
Replies: 8
Views: 246

Re: any good 7s bms recommendations?

Ha ha you must be joking! I've dealt with bestech before they are the worst.

Give you 2 working then all the rest are rejects.
by monster
Jul 20 2020 12:41pm
Forum: E-Bike General Discussion
Topic: any good 7s bms recommendations?
Replies: 8
Views: 246

Re: any good 7s bms recommendations?

Funny thing was, it managed to do short circuit protection and overdischarge protection ok... :twisted:
by monster
Jul 20 2020 12:39pm
Forum: E-Bike General Discussion
Topic: any good 7s bms recommendations?
Replies: 8
Views: 246

any good 7s bms recommendations?

I found this one in a pack i bought on ebay :?