Recent content by drutledge

I bought two super cheap Bafang G320.250 off of ebay to convert bikes for guests who want to tag along on e-bike rides. These are rated at 250W so they are not much. I have identical old (been in a box for at least 7 years?) Grin 20Amp controllers in each setup. One bike I gave a 42V 20Ah...

OMG. Yes, this was the answer. I read about these wires but misread it. They are NOT shorted and unless you have a CA v.3 the PR will NOT turn on. When in doubt reread the damn manual (and the addendum. ) Thanks so much!

I have just hooked up a new Phaserunner MT to my bike but can’t seem to get it to work. Q1) Should there be any indication (LED) that it’s on? There is none. (I’ve checked the usuals, Power cable in is at 48V, polarity is correct, connection is snug. CA,Hall, Phase wires and Throttle (direct to...

Well, as I stated in my last post, I swapped out the 5K and put in a 10K variable and went from a low of about 38V to 28V. The high end of each is still 90V+. Maybe I got lucky.

Answering my own question here for the benefit of others: I swapped out a 5K trimpot for a 10K multi turn rotary pot and got the voltage down to 28V on what was, I think, originally a 60.5V charger. The 5K trimpot only got it down to about 38V. Higher ohms = lower voltages on this type of charger.

It seems that on the one charger I have that as the trimpot is turned to read higher ohms the voltage drops. Right now it's working with a 5K trimpot. I've ordered some others, 10K etc. So we'll see what happens with those installed. I suppose you could add another resistor in line to see if...

I have a couple of the generic Chinese chargers (probably 'BMS Battery' Chargers if I recall correctly) that I ordered years ago that produce about 87V on one and 65V on the other. I'd like to drop these down to about 49V and 32V for other purposes; I hate to waste two good chargers! Anyway...

The magnets are still whole. It's just that I can push them sideways since they are unglued. I have both covers loose so they have room to move. I put a light score where the magnets' edge meets the outer hub. If I tap on the axel and move the stator the magnets move with it and cover up/reveal...

Yeah, I thought that wasn't right! I think the magnets are actually ok but I wouldn't even want to attempt to reglue them. I'm sure they are all unglued since that's what it would take to get the slipping clutch sound that I hear. Maybe the new guy at the factory built this motor! I wasn't even...

Ok. I took the wheel off and looked for signs of shorted wires but found nothing. Popped open the wire side cover and still found nothing but I did find something very interesting: The magnets are not glued to the outer hub! They all move in and out with a fairly light push of a screwdriver...

I tried the second controller and it was the same. I also tried disconnecting the hall sensor wires going to the controller thinking that if there was a short with those, the problem would go away (controller can work sensorless) but the problem is still there. Next step is to take the motor...

I've checked the external connections fairly well and everything seems fine. Could it be a controller problem? Tomorrow I'll hook up a different controller and see if there is a difference. If it's the same, I guess it's internal and hopefully something obvious.

I have a fairly new (<250 miles) Crystalyte TC-80 which all of the sudden has lost power (but not 100% maybe 75%) and makes a sort of 'slipping' sound. Like a clutch not grabbing. When it first happened I thought that my bike tire was spinning out on gravel. The bike moved but not much and the...

Thanks for the help. I got a thin putty knife and pried the one cover off. Easy peasy. The other I couldn't get past the burr but was still able to mount the cover with the stator still attached to my drill press and put some holes in. I didn't think about how much louder the motor would be...

I searched for something here but only found one post with the guy who cracked his side cover. The links seemed to only go into removing cassettes, not for removing the covers. I'll look again... Ok, from a link from a link in that post I got this pdf from Grin...