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by larsb
Jul 26 2020 1:46pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Rieju 50cc conversion
Replies: 233
Views: 33171

Re: Rieju 50cc conversion

Back on track! My Efoil is now built and finished and the 32S BMS just arrived at my door. I won't be home until next week so it's still some days until progress on the moped.
by larsb
Jul 26 2020 1:32pm
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5450

Re: ”The barge” efoil build

It's time to summarize this build :D Costs: wing assy 400 eur epoxy 100 eur glassfibre 50 eur XPS 30 eur 3d print thread 30 eur cables 15 eur throttle 20 eur resistance wire 10 eur dimmer 25 eur PSU 75 eur Plywood 20 eur enclosure 80 eur connectors 10 eur battery module 150 eur 80100 motor 150 eur c...
by larsb
Jul 26 2020 3:00am
Forum: Items for Sale - New
Topic: QSMOTOR,0.5-12kW Electric Hub Motor & Mid Drive Motor Manufacture China
Replies: 1396
Views: 286431

Re: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China

Thank you for your interest, the 180 90H motor is ready, we are testing it with VOTOL and APT controller. It seems VOTOL EM300 is not good, we are building e-tricyle to mount 180 mid drive motor with APT 72600 controller. It's in test process... What are the specifications for the APT 72600? Phase ...
by larsb
Jul 25 2020 9:33am
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5450

Re: ”The barge” efoil build

first flight today :D :D :D
Once up on the wing it's a lot harder to balance and it speeds up quite a bit :D

I smacked into the water like 50 times so i feel quite beat up but still extremely happy with this build, three weeks to build a functioning efoil from scratch is not bad :thumb:
by larsb
Jul 25 2020 3:20am
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5450

Re: ”The barge” efoil build

ugh, i was using what was on the controller when i got it :wink:
don't ask what it was but i can say it was a bit underspeced (i'm SFOCing) :D

i've soldered on fresh 8awg wires and xt150s now
by larsb
Jul 24 2020 4:52pm
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 173
Views: 36962

Re: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+

one could 3d-print a cover for it, would look nice if done well :thumb:
by larsb
Jul 24 2020 3:43pm
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 173
Views: 36962

Re: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+

that's a lot better looking up close, still easy to crack with only a slight bump. did they charge extra for the hall option?
by larsb
Jul 24 2020 10:32am
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5450

Re: ”The barge” efoil build

Got standing today, it doesn't lift yet but it was very close. I'll try some different props and higher current :D

The connectors melted in the box so there's some heat to take care of already now :wink:
by larsb
Jul 23 2020 2:22pm
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5450

Re: ”The barge” efoil build

I set some new parameters on the controller, it runs so much better now that i am really looking forward to tomorrows trials :D
by larsb
Jul 23 2020 10:12am
Forum: Battery Technology
Topic: mega copper battery spotwelder
Replies: 28
Views: 2531

Re: mega copper battery spotwelder

This'll be interesting 8)
sub'ed
by larsb
Jul 23 2020 6:13am
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5450

Re: ”The barge” efoil build

first runs done, total success! :D :D :D The board barely floats with me but it was no problem to stay on it or get on my knees. Enclosure stayed completely dry. There was a bit of power lacking from the drive to reach flying, i need to set the controller parameters better. I'll do some readouts, ch...
by larsb
Jul 23 2020 3:57am
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5450

Re: ”The barge” efoil build

everything is assembled and ready :D First trials today! I cannot take any pics since i crashed my phone and my family is out picking cloudberries. Let's hope i don't need any emergency rescue :D Biggest win of the day is that i still fit in my 15 year old wetsuit (even though i remembered it to be ...
by larsb
Jul 22 2020 3:34am
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5450

Re: ”The barge” efoil build

I compared inductance of the motor and extension wires to previous proven settings for the controller. It's way higher than expected. I wonder if my measurement was correct and i didn't bring the meter here. Hopefully i can do the first trials today, we'll see then.
by larsb
Jul 21 2020 3:31pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 593
Views: 75844

Re: QS 3000w midmotor

it's HTD-8M-20mm (or the nicer GT variants) but the rear pulley they use is not cut to more than HTD standard.
by larsb
Jul 20 2020 12:17pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 593
Views: 75844

Re: QS 3000w midmotor

probably bearings damaged during assembly.
second guess is that sensor ring is touching something. remove cover on the rear side to check this.
by larsb
Jul 20 2020 6:01am
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5450

Re: ”The barge” efoil build

Sanding the ridges and defects after the vacuum bagging took an hour, it needs a finishing coat to look OK but i don’t have any tools or epoxy where i am now - it will have to do :wink:
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by larsb
Jul 20 2020 1:07am
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 173
Views: 36962

Re: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+

Those hall wires look fragile and no strain relief. That’s only halfway decent. Can it be adjusted?
by larsb
Jul 19 2020 3:10pm
Forum: E-Bike General Discussion
Topic: Throttle dead zone fixes
Replies: 39
Views: 2286

Re: Throttle dead zone fixes

@TolkaNo: You can make something like this update also to fix dead zone:
viewtopic.php?f=2&t=77735
by larsb
Jul 19 2020 2:17pm
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5450

Re: ”The barge” efoil build

Finishing the two printed props with some layers of epoxy glue. I’ll also receive a professionally printed nylon prop tomorrow, should be enough for some first trials. F12C58A9-B4B0-4030-A4B6-E27AE4A7E236.jpeg I’ll buy a prop once i know what i need as balancing and surfaces will never be 100% on th...
by larsb
Jul 19 2020 6:52am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 1155
Views: 115571

Re: Votol EM-100 & EM-150 controllers

Could it be you opened chinese program..?
Then windows don’t recognize the font.
by larsb
Jul 18 2020 12:11pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: KTM 200 exc goes electric
Replies: 152
Views: 21056

Re: KTM 200 exc goes electric

But but but? You could’ve just taken the middle section of the sprocket down to 2-3mm or so on the lathe. Would’ve been strong enough and a 5min job.

I’m quite worried you went overboard with the sprocket lightening. try it out carefully before going full attack.
by larsb
Jul 18 2020 11:23am
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 593
Views: 75844

Re: QS 3000w midmotor

I don’t know anyone that smoked one yet :D
That’s a challenge for y’all
by larsb
Jul 18 2020 10:56am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 1155
Views: 115571

Re: Votol EM-100 & EM-150 controllers

That’s too rough steps, you need to be within max 20-30 degrees from optimal for it to work well and ideally max 5-10 degrees.

Do you have cutouts only with noload or also when driving?
by larsb
Jul 18 2020 9:58am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 1155
Views: 115571

Re: Votol EM-100 & EM-150 controllers

I believe that motor has a square bemf and should ideally be driven with square wave controller.
What other phase angles did you try besides -120? That’s your biggest chance of getting it to work to find the optimal phase angle match.
by larsb
Jul 14 2020 5:04pm
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5450

Re: ”The barge” efoil build

Final push to get the barge ready for water!
Wired motor, and most of the rest. Only throttle and phase connectors on motor side left
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