Recent content by Svard75

Update on this. the bike is back together and amp meter with 350a shunt installed. From stop to go i’m reading 76amps. I wish i had a baseline to compare but based on feeling it definitely pulls stronger since the shunt mod. batter sag was quite significant. my packs only 24ah but they’re...

I checked ebike.ca. I think CA is overkill. I just want to see instant amps and temps. I’ll get a $20 100v/100a with remote shunt from Amazon. I ordered statorade off ebike.ca. Happy to get that installed. I’m moving away from my controller at this point so I’ll stop updating this thread...

Any brand preferences? Looking for a waterproof unit and also a temperature meter. One for controller and one for motor.

I put the controller into the frame and gave it a ride. Yes there is a difference. I would speculate about 20% more torque. What I noticed as well was a sag from 82v all the way down to 64v for a brief time while I was accelerating hard. I think the controller will handle this new setting but...

I would have preferred to trace the circuit but the issue is they’ve printed heavy while lines, boxes and component identifiers so much that I cannot follow the small lines. What I’ll do is remove the pot completely, re-attach the sense line using my wire and leave the shunt mod. If the...

I guess I missed this entirely. This is why I was so confused how guys are using a tiny trimpot and not smoking it! :lol:

Thanks. I will review those posts again. I guess I should remove the shunt mod as much as possible first before doing the pot mod. Thanks this was helpful.

Hi J Bjork. You are correct in your assumption. I connected one side of the potentiometer to the power side of the shunt the other side to the sense side of the shunt and the middle or wiper end to the sense line. My potentiometer is 25 ohms. If I used 1k or 10k my resistance values would have...

Here is a photo of the assembled controller. The three wires are 16awg and very short. About 1” each. I was able to measure resistance at the lowest point at 0.5 ohms. I suspect this is still quite high. So at this point I have no idea what will occur. In the meantime I am shopping for a new...

No sweat amberwolf. Real life is more important. I live in Canada, riding season is over anyway and the bike is apart due to servicing the front forks. These things came with hydraulic fluid I think. And overfilled. Planning to look at the rear shock as well, however I heard the rear are...

I guess I’ll just keep talking to myself :lol: I’ve been reading up on the power triangle to help me understand the maximum voltage the potentiometer will take. So far the calculation is as follows V = P/I Power is not really known yet because I need to measure the resistance of the four...

Question. I could only find a 25ohm 3watt potentiometer for this project. I’m not certain I understand this circuit mod completely. My question is should I be concerned that I’ve only got 3watt when 72v is passing through the two end points in the potentiometer? I think I read somewhere that...

Trace is cut but soldering to the tiny remaining trace wasn’t fun. I had to apply epoxy to the wire to ensure it doesn’t rip the remaining trace off. My plan is to mount the potentiometer so it’s accessible from outside the controller.

I decided to pull the board. Some very interesting design ideas. I think this is an example of over engineering. I found the sense line so I can solder a pot. Look at those phase segments. Beefed up traces with copper plates. 24 fets. I feel a little more confident in the trim pot mod now.

If it’s too much wouldn’t I be limited by the batteries capabilities. My bms states 50a. I assume if it attempts to pull more the bms will cut.