Search found 2735 matches

by e-beach
Sep 19 2020 5:13am
Forum: General Discussion
Topic: Just had an earthquake in Los Angeles
Replies: 121
Views: 14383

Re: Just had an earthquake in Los Angeles

Woke me up......went back to sleep. Magnitude 4.6 - moment magnitude (Mw) Time Friday, September 18, 2020 at 11:38:46 PM (PDT) Saturday, September 19, 2020 at 6:38:46 (UTC) Distance from South El Monte, CA - 3 km (2 miles) WSW (250 degrees) Montebello, CA - 4 km (3 miles) NNE (33 degrees) Rosemead, ...
by e-beach
Sep 15 2020 10:25am
Forum: Electric Aircraft
Topic: Exhaust fan on velomobile doubling as propulsion
Replies: 12
Views: 463

Re: Exhaust fan on velomobile doubling as propulsion

Do a wind tunnel test. Or model it if you can.

. :D :bolt:
by e-beach
Aug 23 2020 10:35pm
Forum: E-Bike Technical
Topic: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers
Replies: 176
Views: 23072

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

Well, if your front hub wheel comes out of your forks at any speed, your face can easily be heavily evolved with the pavement. There are plenty of break-up songs in the world of songs, do you know of any that sing about the break-up of your face? That is what can happen if your front wheel hub motor...
by e-beach
Aug 22 2020 10:46pm
Forum: General Discussion
Topic: Raised Bed Gardening - Cement Blocks > Greenhouse!
Replies: 299
Views: 41458

Re: Raised Bed Gardening - Cement Blocks > Greenhouse!

Time for canning! Just picked up 3 dozen new ball jars my self.
by e-beach
Aug 04 2020 7:25pm
Forum: Battery Technology
Topic: Fuse Wire Welder Prototype
Replies: 6
Views: 180

Re: Fuse Wire Welder Prototype

I have never had inaccurate temperature readings with my infrared thermometer due to reflectivity of metals, however any accurate measurement you choose will help the rest of us. As you know, heat is damaging to lithium cells.

:D :bolt:
by e-beach
Aug 04 2020 6:27pm
Forum: Battery Technology
Topic: Fuse Wire Welder Prototype
Replies: 6
Views: 180

Re: Fuse Wire Welder Prototype

So then, you haven't used an infrared thermometer to check the heat of the cell, before and after the weld?
by e-beach
Aug 04 2020 2:37pm
Forum: Battery Technology
Topic: Fuse Wire Welder Prototype
Replies: 6
Views: 180

Re: Fuse Wire Welder Prototype

How hot do the cells get? It looks like a lot of heat is produced.
by e-beach
Aug 01 2020 10:40pm
Forum: General Discussion
Topic: Just had an earthquake in Los Angeles
Replies: 121
Views: 14383

Re: Just had an earthquake in Los Angeles

markz wrote:
Aug 01 2020 9:44pm
How many earthquakes happen in Californi.......
Yep, but it is the ones that you feel that concern you. And yes, a 4.2 isn't a "Big One". But if the epicenter is under your house, and you feel like you are going up and down like a jack hammer, then concern deepens.
by e-beach
Jul 30 2020 6:39am
Forum: General Discussion
Topic: Just had an earthquake in Los Angeles
Replies: 121
Views: 14383

Re: Just had an earthquake in Los Angeles

This one woke me out of a deep sleep. :shock: :evil:

Listed as a 4.2 at the moment. The epicenter is about 20 miles from here but we got a good rattling anyway. Time to go back to sleep.

https://scedc.caltech.edu/recent/Quakes/ci39322287.html

:D :bolt:
by e-beach
Jul 24 2020 11:34am
Forum: E-Bike Non-hub Motor Drives
Topic: Tsdz2 hall sensor number not changing (OSF)
Replies: 1
Views: 187

Re: Tsdz2 hall sensor number not changing (OSF)

Sounds like one of your Hall sensors or the connection to it may have gone bad. The Halls get a voltage from the controller. Usually 5 volts. As the magnets in your wheel pass the halls, (most motors have 3 Halls, although some big motors have 6), the halls latch open or closed to give the controlle...
by e-beach
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: 385

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

Here is a link to check out to give you an idea of how to separate the motor halves.
viewtopic.php?t=30050
by e-beach
Jul 19 2020 9:39am
Forum: E-Bike Non-hub Motor Drives
Topic: BBSHD runs backwards/ forwards sporadically.
Replies: 14
Views: 756

Re: BBSHD runs backwards/ forwards sporadically.

Did you ask Luna what is going on with that controller?

:D :bolt:
by e-beach
Jul 18 2020 9:37pm
Forum: Items Wanted
Topic: Good front hub conversion
Replies: 1
Views: 153

Re: Good front hub conversion

Does this mean you are looking for an ebike? Or a kit? Not sure what you mean....

:D :bolt:
by e-beach
Jul 17 2020 8:50pm
Forum: E-Bike Non-hub Motor Drives
Topic: BBSHD runs backwards/ forwards sporadically.
Replies: 14
Views: 756

Re: BBSHD runs backwards/ forwards sporadically.

I would say "no". It doesn't sound like a faulty hall sensor. A faulty hall will cause juddering, (shuddering) but when the wheel is at that spot where it matches up with a bad hall, the motor just stops. Sounds like a controller problem, like it is trying to self learn and not getting it right. :D ...
by e-beach
Jul 17 2020 8:21pm
Forum: E-Bike Non-hub Motor Drives
Topic: BBSHD runs backwards/ forwards sporadically.
Replies: 14
Views: 756

Re: BBSHD runs backwards/ forwards sporadically.

Well, if you have tested all the hall, phase wire combinations, then it sounds like the controller is either set wrong, or broken. You can also try to test with a "Brushless Controller Tester" from eBay or someplace else.

Have you seen this chart?
phase wire determination.jpg
phase wire determination.jpg (212.56 KiB) Viewed 351 times
:D :bolt:
by e-beach
Jul 15 2020 5:19pm
Forum: Battery Technology
Topic: New BMS cuts out
Replies: 10
Views: 506

Re: New BMS cuts out

Humm sounds like when you put the new one on, it didn't have enough time to balance the cells. Sounds like all is well now. Good News! :thumb:

:D :bolt:
by e-beach
Jul 12 2020 8:15pm
Forum: E-Bike General Discussion
Topic: bulkbattery review question
Replies: 7
Views: 302

Re: bulkbattery review question

markz wrote:
Jul 12 2020 7:59pm
It looks like no one has. ....
Hummmm. Looks like they have reasonable prices, but I was hoping for an experienced opinion.
by e-beach
Jul 12 2020 6:18pm
Forum: E-Bike General Discussion
Topic: bulkbattery review question
Replies: 7
Views: 302

Re: bulkbattery review question

Bump....

Not trying to sell anything. Just wondering if anybody has worked with Bulkbattery?

Has anyone even heard of them?
by e-beach
Jul 11 2020 5:25pm
Forum: E-Bike General Discussion
Topic: bulkbattery review question
Replies: 7
Views: 302

bulkbattery review question

Has anybody ever used bulkbattery as a battery supplier? If so, what is your opinion of them?

Thanks

:D :bolt:
by e-beach
Jul 11 2020 1:46pm
Forum: Battery Technology
Topic: Working with thick welded aluminum busbars?
Replies: 1
Views: 130

Re: Working with thick welded aluminum busbars?

A Dremel tool with a diamond cutting wheel might work. However, be sure not to short anything with the sparks and flying metal particles.

:D :bolt:
by e-beach
Jul 10 2020 9:35pm
Forum: Battery Technology
Topic: need help wiring headway 38120S 10ah lifepo4 cells
Replies: 62
Views: 8888

Re: need help wiring headway 38120S 10ah lifepo4 cells

If I run the 2X 4 sets together I get over 20v I need to run 2X4 sets but need end voltage to b 13volts 2X 4 sets?...... Please study the proper phrasing for battery building. Are you speaking about 2S 4P (2 in parallel, 4 in series?) or are you talking about 4p 2s? (4 in parallel 2 in series?) You...
by e-beach
Jul 08 2020 3:31pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Motor wattage rating for Lime/Bird/Roll?
Replies: 5
Views: 609

Re: Motor wattage rating for Lime/Bird/Roll?

I think that they are around 700w (36v x 20a) or close to that.

:D :bolt:
by e-beach
Jul 07 2020 9:16pm
Forum: Battery Technology
Topic: Parallel series battery architecture
Replies: 15
Views: 508

Re: Parallel series battery architecture

..........On the other hand, I am thinking that if you were to buy a 10 x 4 battery, that would be compromised of units of four batteries in parallel connected in a single series chain. Does that sound correct? ......... Not necessarily. If you want to purchase a 12v battery (fully charged to 14.4v...