So I ended up having some time today to figure this out. I reset the motor settings to default but was still getting cutouts at full throttle and pedal assist 9 while pulling 30 amps. I reinstalled the stock DPC18 and no cut outs. I also noticed that at full throttle the DPC18 showed one hash under 30 amps on the display, so that got me thinking it was limiting the current to 28ish amps. Essentially my theory that throttle would spike to 30 amps is wrong, with the DPC18 it doesn't quite reach 30 amps. So I reconnected the Eggrider and set the battery current limit on the Basic page to 28 amps and then reset the programming to Smooth Tune settings. No more cutting out.
So it's fixed, but I still don't understand fully why. The settings read from the controller before changing anything showed current limit @ 30 amps on basic page, but it seems the DPC-18 display over-rides this setting and limits the current below 30 amps. I'm guessing a firmware thing and some m620 motors can pull 30 amps and some are limited to 28 amps. IDK, just following up to add to the knowledge base.
Hello @imageadio,
Thanks for your feedback. I had the same issue at first, the motor would alternate between off and on every 2-4 seconds. It felt like it was delivery enough power for the speed at which the bike was going but I was only going ~5km/h (
3.11 mph). I corrected that issue by using Frey's smooth settings.
But then I got into another issue, the motor is not delivery any where near what it should be although it displaying +500 watts of power. Super weird. It's almost like the Eggrider or G510 controller is not measuring the correct current.
So here are my symptoms and steps I've tried in hope someone can help me out here.
The bike and components are brand new (except for throttle and one dcp10 display for test, I'll go over that later why that is case).
Battery 52V 40A. Bafang G510/M620 (52V version, not my settings, I bought as is.). Eggrider with latest version as of 23/11/2022. Programmed Frey's smooth settings via Eggrider and also USB.
Symptoms: Whether I'm in PAS 1 or 9, I get the exact same motor power output. It feels like maybe ~100-250W (max, probably less to be honest) of power from the motor but I get readings like ~+500W.
I tried to reset settings to stock, not much difference.
I tried to update the eggrider, no difference.
I tried Frey's settings again, no difference.
So I tried a friends throttle and things got weird. At first nothing was different, the motor power output was poor just like with pedaling. In desperation, I left the throttle full open and started to notice the motor would slowly and gradually output more and more REAL power and speed at which point the motor speed and power kinda spiked and stayed steady. This is when I let go of the throttle only to find the motor would not stop, some sort of cruise control like on some scooters. I had to power the bike to stop it.
When I turned the bike on, I went for another rider and got the same effect but this time I finally got REAL full power just like it should be (based on other bike builds with similar voltage & power specs). But it did not last. A high temperature error displayed on the Eggrider and cut the motor but I was on flat road. After a few minutes of cooling, I tried the bike again and got the same shitty low power I had since the beginning.
I tried a different display (DCP10). At first I still had the same low power. But for another brief moment, while the back wheel was in the air (on bike stand), I got full power. I thought to myself, at last it's working and put the bike down for a ride but nay, nothing had changed. I'm aware the running the motor in the air does not apply the same resistance that on the ground, but you could clearly tell there was a difference in power and speed just by observation.
I spent money, time and effort into this brand new bike that it saddens me to get this type of result. Has anyone had this type of issue or see something I'm missing?
