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  1. G

    A bit disappointed by my BBSHD (from EM3ev)

    I got a bunch of those resistors to do that mod. Thanks for figuring it out. I'm going to see how I like this program for a bit first before opening up the controller. The throttle works well in all PAS levels except PAS0 for the most part. 27W in PAS0 is hardly working and as soon as there is...
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    A bit disappointed by my BBSHD (from EM3ev)

    You can do very little through the display. You must have the programming cable to program the controller and to add the .el file and modify it if needed. Paul sent me a new controller and the .el file to try first. I did not use the new controller, not yet anyway. The controllers have Bafang...
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    A bit disappointed by my BBSHD (from EM3ev)

    I can't say enough good about EM3ev. Both Paul and Joseph respond to emails in 24hrs with an apology for the delay. At least they aren't relying on forums to do their tech support! I too got a HD with throttle issues. I had no idea it wasn't going to work like my 02 ver1. If I pedaled and used...
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    Tesla Model 3

    Sadly we canceled our model 3 order. We waited for 2 years to get our $38000 car. Then our number finally came up and it was going to cost us close to $60000 if you really wanted to drive it.The tesla was going to cost us $760/mo with $10K down. We got our $1000 back in 2 days! Sad that we...
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    Spot welding fuses to individual 18650 cells?

    About 18A constant and 26A peak which can last for several minutes. I have to use too much heat to weld the .2mm Nickel and the cell is getting hotter than I would like. I think I will just use the .15mm and double it up. That is how the pack was made.
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    Moots Zirkel 52v 20ah 8fun. Wahoo!

    I didn't notice that and see no shorting there but the more than half of the nickle strip being blown out is what I saw. I don't see how they could say that I didn't store the pack correctly and that is why it failed. I have 2 other ebikes that hardly get used any more at all with no issues, not...
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    Moots Zirkel 52v 20ah 8fun. Wahoo!

    I'm not sure what happened first. It is clear that some damage was done at the factory seeing more than half of the nickel strip is blown out. I noticed no smoke when it started to fail but I was riding and the pack is in the triangle frame bag. I didn't open up the BMS till after the failure.
  8. G

    Spot welding fuses to individual 18650 cells?

    Yes they do fit nicely on the positive cells but the negative will be on top of the holders unfortunately. Outside of design my biggest problem is weld consistency making sure I don't burn some diameter off the fuse wire at the weld. I have played with resistance soldering with good results but...
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    Moots Zirkel 52v 20ah 8fun. Wahoo!

    Interesting observation, the cells that failed were in and next to the group that had been shorted out during the build of this pack from Luna. I noticed the damage the first day I received the pack after taking the wrap off! I decided to use the pack anyway being we were in a rush by then. My...
  10. G

    Spot welding fuses to individual 18650 cells?

    What do you think of this layout? 52v 20ah Luna brick rebuild. This is the top of the two bricks put together. The bottom will use neg fuse wire as well. My thoughts were to use only neg fuse wire so if wire slag falls between batteries it won't short out. 2 layers of 8mm x .2mm nickle on...
  11. G

    Fuse-wire for individual cells, DIY Tesla style

  12. G

    DIY Arduino timed spot-welder, FET-switched, adj. pulse

    I bought these 300ANL fuses with holders. Marc said that I don't need them if using a car battery but highly recommends them if using a small pack. Something else to put in my inventory of lessons learned...
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    Spot Welding Copper Strips to 18650 Battery Cells

    Use green grinding wheels, aluminum oxide wheels will dissolve grinding tungsten.
  14. G

    18650 spot welding -how to- ULTIMATE REPOSITORY

    My 110v didn't and was told I should of got the 220v so I did. It did no better. It does .1mm//004" Nickle and 30AWG fuse wire. Got malectrics welders now. Ver3 is nice and Marc is a great guy to work with.
  15. G

    DIY Arduino timed spot-welder, FET-switched, adj. pulse

    .15mm with a small ring of 1/32" solder under tab. A lite brushing of flux on tab only. 50MS
  16. G

    soldering vs spot welding debate

    I just stuck some .15mm nickle to - side of several batteries. Tinning battery takes .8 sec and leaves too much solder. I can touch with my finger as soon as I put the iron down. TInned nickle and soldered it to battery. 1.5 sec. Can touch only for a couple of seconds. Measures 165F on battery...
  17. G

    DIY Arduino timed spot-welder, FET-switched, adj. pulse

    I was playing with .2mm nickle. First good welds were at 50MS. THen I had to keep increasing time and was not getting good results. Was up to 180MS before got a good weld. Noticed buildup on tips so I filed them to a point and at 180MS blew through and tring to remove the tab it tore the tab...
  18. G

    DIY Arduino timed spot-welder, FET-switched, adj. pulse

    Welded .2mm to battery at 50MS without issue. Welded 30 AWG fuse wire to battery at 0007MS fm7UmFPuim0 I had an issue with Ver2. Marc said he had a batch of bad Mosfets. He offered me a refund or a new Ver3 when it comes out. I opted for Ver3 and waited 10 days till I got it. I had some...
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    DIY Arduino timed spot-welder, FET-switched, adj. pulse

    Got a version 3 Had to delete "//" and add"//" to 1306 code and now it works.
  20. G

    soldering vs spot welding debate

    After you hit the batt with 3 welds the tab is way too hot to touch. After I solder with a 250W iron I can easily touch the tab after soldering. It takes a fraction of a second to solder. I adjust the temp to match the job. With this much mass, I get very consistent, quick solder joints. I first...
  21. G

    DIY Arduino timed spot-welder, FET-switched, adj. pulse

  22. G

    DIY Arduino timed spot-welder, FET-switched, adj. pulse

    Received my kit today. Tracking is fair and customs held it for 4 days but all is good.
  23. G

    Moots Zirkel 52v 20ah 8fun. Wahoo!

    Had a fire one street over. Roads were blocked so I took the bike over to investigate. 4 miles later I barely made it home. Took the pack apart and found 16 cells were shorted and 3 others around the bad spot in the pack from the factory were low on voltage compared to other good cells. Should...
  24. G

    DIY Arduino timed spot-welder, FET-switched, adj. pulse

    Ordered one yesterday.
  25. G

    Nuvinci N360 hub

    350 miles of mostly dirt trail. I hit 1340w frequently. The hub is not seeping anymore. I have a proper chain tensioner on it now which was never an issue, the derailleur was just temp. I use Mavic rear cogs so there is lots of choices for rear gearing. Keeping the steel 46t chainring and...
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