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  1. J

    Cycle Analyst V3 preview and first beta release

    Give up the power limit control and just set it to the max you require (mine set to 30amps on the grin 40amp controller) so the wires don't melt. It's more about what you use than what you want (everything?).
  2. J

    Cycle Analyst V3 preview and first beta release

    MrBill - here is a thought ... get a resistive throttle and connect it to the aux analog input and set it to be the speed limiting control. Now your throttle, if wired backwards, will become the inverse max speed control only and slow you down at any time, although not at a light to strong rate...
  3. J

    Cycle Analyst V3 preview and first beta release

    Justin (Dad👍) ... been riding 4289 miles, now in year three with nothing during a very rain filled first six months last year. Just got back into this forum to catch up last week and saw your post... I am running watt control with the throttle so it has the ebrake release kick ...did not try amp...
  4. J

    Cycle Analyst V3 preview and first beta release

    Wow plenty of reading here! Just flashed last week 3.14 from 3.12 on my CA3 and got the max speed 654 a couple of times and not once...not a big problem. I run a slim throttle (fantastic!) and current control (torque drive) instead of speed control which allows nice controllable takeoff...
  5. J

    How-To: Anti-Spark XT-90 Loop Key

    Yeah the caps need to be electrically close to the controller output FETs for them to work. Plus keeping caps across the batteries will slowly drain the battery through cap leakage and if a cap failed ... Poof! But keep thinking!
  6. J

    How-To: Anti-Spark XT-90 Loop Key

    Actually a much cleaner way is to make your series cable that connects two battery pack in series have the jumper between the packs go to a connector of any type with a jumper resistor soldered to the connector and wires. The resistor charges the controller caps so pick a proper value and power...
  7. J

    Wheel spin (how many revolutions?)

    Sounds like some desecant is needed inside the hub, certainly plenty of room for some in there. I guess the real test is if mine is getting damaged because I have only been out in fog no rain. Might be good to check out my windings too since I am running the Grinfineon 40amp controller but...
  8. J

    Wheel spin (how many revolutions?)

    For a hub that is so well sealed it seems counter intutive to drill holes to let water out that shouldn't be in it in the first place. I think after seeing how badly the magnets we're damaged that it may make a lot more sense to get some sealer over them to protect them better. Drilling holes...
  9. J

    Wheel spin (how many revolutions?)

    Judging by the water marks it looks like it had completely submerged the bottom magnets. Fortunately the hall senses were on top! I hammered the rotor and stator apart, yeah it was stuck together, removed excess rusted magnetic particles, coated it with anticorosive black paint, put it back...
  10. J

    Wheel spin (how many revolutions?)

    Talking about rotation drag ... the first eBike DD hub drive I built for a older friend took it to Florida for the winter and lived on his boat near the salty water. Yeah not a good idea for the bike but even worse for the almost water tight hub motor. By spring time the rear wheel wouldn't turn...
  11. J

    A2B Metro restoration / modification - Fechter's first Ebike

    Sorry guys been off line for a while... The stock charger runs at like 4 amps and when it reaches 42 volts or so and the current starts to drop a little it goes green and disconnects so not much time balancing. I opened up the three pin charge connector and tapped into the red and black wires...
  12. J

    A2B Metro restoration / modification - Fechter's first Ebike

    NOW The big concern is how far out of balance are all the cells and how well does the bms limit over voltage on a per cell group for the ten groups? May have to slow charge it for a while with something other than the four amp charger.
  13. J

    A2B Metro restoration / modification - Fechter's first Ebike

    Right on the money there Fechter! yeah it was down to about 23 volts or lower so I applied an adjustable Power supply with a current limiting 120 volt 20 watt bulb in series to the charger wires externally and saw the voltage slowly coming up and then pulled the battery out and put it on the...
  14. J

    Definative guide to generic controllers?

    Did my down hill trip and shot a few of the Cycle Analyst ... Regen numbers for those who doubt it's usefulness... Yeah that's 221.2% and it was dropping as I took the photos from just the CA drain but crazy numbers.
  15. J

    A2B Metro restoration / modification - Fechter's first Ebike

    Ok the hub took 5 clamps and a lot of hammer tapping with a plastic Hammer to get it together and it spins without doing anything funny like firing a phase now and then the slow itself down. Reinstalled it back into the bike today and the damn battery went dead over the winter after being...
  16. J

    Wheel spin (how many revolutions?)

    Been driving/riding an EV with a high clogging 6000-12000 watt motor for about 17 years yup 50 -60 watts at full speed is what this hub motor draws and about a couple of watts and low speed ... I can go 5-6mph at 50 watts on level road without pedaling so one of my SunPower solar panels could...
  17. J

    Wheel spin (how many revolutions?)

    Naaaa it has rotational drag not stiction ... it turns easily just has what you might call speed drag which is typical with magnetic field eddy currents. Actually my brother thought it was side load on the bearings ... he sees a lot of that in poorly constructed wheels for motorcycles.
  18. J

    Wheel spin (how many revolutions?)

    I'm going to connect a gram spring scale to the tire and see how much force it takes to turn the wheel ... that should be an easy way to measure drag. I usually run the motors I test at their lowest speed and how many watts it takes to turn it then at higher speed and see how many watts then ...
  19. J

    Wheel spin (how many revolutions?)

    It runs just fine but I did figure out when I bought another external speedo that I have the pole pairs count set to 24 when it really should've been 23 for the cycle analyst and I'm actually going further and faster than I thought but 8.2 watthours per mile over 40 miles is pretty good I think...
  20. J

    Wheel spin (how many revolutions?)

    On a somewhat related topic ... Not to thread jack my own thread ... Has anyone found that digital speedometers are not indicating speed very well compared to a Cycle Analyst version 3.1. .... Seems a rechargable speedometer I got in yesterday was way off in spite of setting the wheel...
  21. J

    Wheel spin (how many revolutions?)

    The Newton meter torque drag is a great number to know but really how about something simple like my front wheel spins for 4 minutes and my Chinese 1000w dd rear hub motor will go 2 full revolutions before stopping with a one hand spin of the lucky wheel! How many revs for others out there...
  22. J

    6 - 9 - 12 FETs ... Why 9?

    The shunt is set to the controller value on the label and verified with a wattmeter ...no I live on a hill about 300 feet above sea level and was going downhill to sea level with light pedaling and a bit of a tail wind until it changed from the southwest later when I got headed but the first 5...
  23. J

    6 - 9 - 12 FETs ... Why 9?

    The engineer in me made me do it ... dug up an old pot and wired it to a three pin connector for the AUX input a little hot glue onto the CA3 clamp and poof! Speed limiting control activated! I did not expect it to work so well! You all at Grin Technology have a fantastic product with this Cycle...
  24. J

    6 - 9 - 12 FETs ... Why 9?

    found these tiny 3 pin connector that I use for the motor power phase wires because they work great and are small enough to fit through the axle nut where the wire have to run out of the motor. These are the Grinfineon 35amp controller wires in this photo replacing the nice but bulky Anderson...
  25. J

    A2B Metro restoration / modification - Fechter's first Ebike

    Thanks fechter I'll give that a try ...not like it will spin ha ha no magnets! I have worked with hall sensors ... had to 3d print my own hall sensor plate for a motor, very nice way to make a precision part btw. I didn't find this hub hard to take apart but it was very clean for a 5-7 year old...
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