EBike PAS in VESC - Basic Setup. WHAT is GOING ON?! (It Needs Work) 

I couldn't get PAS to work at all when i changed the CONTROL TYPE from Cadence to Constant Torque, i think that is for a torque sensor? I think right now, the cadence PAS behavior in vesc is kinda hard coded and basic. The best way to set it up might be changing the RPMs to a low value that is the same ... so its not doing this RPM funny business based on how fast your cranks are spinning. I don't know how much i want to fuss around with this PAS trying to make it work, Lol I am ready to start coding something. Thanks for that reply to my email I read it at like 4am I have to read it again Lols. You havent missed anything important I just got the regen working with my g62. ANd the Talaria Stuntman did a wheelie straight into a gate, that was funny.

@EBikeBuilder_ Yeah not sure why it doesn't work, I've read about it it's supposed to even with cadence sensors. Just gives the set power at all times of any rotation. Problem with setting stop rpm low as well is going above it cuts pas power. But I get what you mean. Maybe you can test out a fancy torque sensor on the bike, I know vesc can support it because cyc uses vesc for their controllers now. Good luck on the coding adventure, maybe you can make sense of the Luna code to implement it into yours for a display and pas modes. Oh yeah I watched a bit of those videos but they are very low haha, didn't get time to finish them. I think you should get a second vesc for the front hub to go awd. The vesc's can connect together and work together

@@Bengy22i would hook another flipsky to the front motor But that thing is so loud its not great for videos, when i had both motors on 1 throttle and the front one was always going the motor noise was unbearable Lol😂 i want to get another flipsky But i need one for my BBSHD mountain bike first…. I want to get back to that also. My front hub i only use some times so its not a super high priority… but if flipsky sent me a couple controllers or something i would make some dual ESC content. Otherwise i gotta buy a bunch of flipskys and I’m OCD about buying things i don’t absolutely need 😅

Im not a fan of those type of PAS either, that’s why i opted for a torque and cadence sensor. The torque sensor allows for easy startup, then the cadence sensor with kick in when you pedal fast enough. i just have to find out how to configure it on the vesc.

​@@rdd3adeyegood Luck

I think the Flipsky has firmware 6 , i think you are right about lowering the PAS start RPM to a low value like 2. Then set the PAS end rpm to something low also that is a comfortable cadence and power output. I don’t like how the PAS power output is based on the pedal RPM , i might try to change the code and add a different option. To make it behave more like a normal cadence sensor. I agree its nice some form of PAS had been implemented in Vesc as its a good starting point for further improvements. 🎉

i saw some one mention that on a forum some where, it looks like that may be the way to go, I see the LISP scripts are sand boxed and shouldnt cause any bricking problems

What forum are you using EB?

@@paulpostel9721 this is the thread that I have found on the VESC forums that has a sample LISP - VESC script of how to read a PPM 3 wire cadence PAS sensor... vesc-project.com/node/3689 I am taking this script and using it to learn LISP VESC scripting , this script is very basic hard-coded and not very complete , I have changed the script a bit to read the PAS signal from the RX pin instead of the PPM or whatever it was doing. And i think I have a handle on the scripting. But that script wont work for my PAS sensor it seems, I need to do some scripting I am working on it right now

@@EBikeBuilder_ thanks man. I truly like your videos with the flipsky in combo with the G062 motor. I use that motor and now own the flipsky, actually I'm wiring up the flip tomorrow. I'm going to use the crew dart platform with a inverted fork and 60v HD battery.

You have a good point there. Try it

The issue is from the skate board side. Vesc is thinking the sensor is the joystick for certain boards. Push forwards go forwards push back go back. But based off the amount of movement. Someone just changed it to rpm vs movement percentage.

for this video i turned the regen with ADC Brake Center off / i have the regen disabled in this video. When the brake is ON, the PAS is OFF- that was REALLY throwing me off. Since I had the brake set up to center, with throttle min mapped to center, it was engaging the brake when i was off the throttle, and I could only get PAS to start when i would engage the throttle enough to release the brake. So for this video I just disabled regen. There's a few ways you can hook up the regen brake. I liked it on the throttle but it's at odds with PAS. I think if you want PAS with the regen you need some way to control the regen, or disable regen, its kind of annoying to have to hold the throttle beyond a certain point to get PAS to engage

i think another option might be to use the profiles feature. and set up one profile for PAS and ADC. and then set up another profile for the ADC Brake Center with regen. if you are on the streeet and want regen. Im still trying to think through all of this and how to make it work best

@@EBikeBuilder_ PAS + Regen Brake would be interesting, but I was thinking more basic: PAS + just motor cutoff on brake. The idea is that if the motor gets frisky for some reason, the grabbing the brake will at least start friction brake and also signal motor cut off to the controller.

@@NoInfoFound Its possible to set the brake up as more of a button yeah. You would connect a brake lever with the 3 wires to GND and 3.3V (in parallel with the throttle) and then the brake signal goes to ADC2, is how the Flipsky wiring diagram has it shown to connect the brake lever. And probably have to map the maximum. and minimum voltages of the brake similar to how you map the adc throttle voltages. Then hitting the brake lever should be like an on/off toggle on ADC2. And in the ADC control mode you would use Current No Reverse Brake ADC2 I think, or Current No Reverse Brake Button , Im not sure which control mode it would be to hook up to that brake signal on ADC2, probably something like that. I was thinking about mapping my regen to the ADC2 brake as well. But I only have those mechanical / cable pull brake levers with the electronic shut offs, I dont have any of those ones where you glue the magnet on with the sensor for hydraulics, and Im not about to take my hydraulic levers off my bike. So i dont think i am going to put regen on the brake lever. There's no way to modulate the power of the regen when its on a brake lever like that, unless you have some kind of a special brake lever that acts more like a throttle with a range of voltage, as opposed to the brake cut off which is more of an on / off thing. So I think for regen. I will probably try to make something similar to Grin Tech where its like back pedal regen Or something like that maybe, IDK, I still dont know what to do about regen. But Its important to be able to control the power of it. And I dont want a whole separate throttle just for regen. So its alot of like trying to figure out how to make it all work togethjer in a way that is user friendly and not annoyhing while riding. I never set up my regen with the grin tech stuff I will have to look into how they do regen. I remember in that grin tech talk about regen , justin talked like half an hour just about this challenge and how to engage regen

@@Calibike on 72v with bbshd it needs a very low gearing and then enable field weakening to increase the rpm , it wants to spin fast, When i tried 72V bbshd and shifting gears with derailleur it will very quickly heat up in high gears

pedal assist shouldnt require understanding lmao. It should be intuitive. The VESC PAS sucks man; im not even going to bother with it. Sonic the Hedgehog is NOT how to do PAS lmao

@@EBikeBuilder_ thats why Im saying to lower the max... so it can go faster with less peddle... I actually like the fact that they did it that way since it gives you some control over how fast it moves... rather than my current ebike that just goes full throttle when it moves 1/4 way around... basically... I dont think Peddle assist should be an on/off switch... but it could be if you put the min 1 and max low like 2rpm

ty for the kind words mate I appreciate that, Your bike sounds fun, I like how that PAS on your bike is set up, working based on crank rotations and different levels of speed. That is more what i would expect from a cadence PAS system!!

do you see the red LED light on your PAS sensor when you pass the magnet by it? it needs to be hooked up to the 5V and GND on your VESC comm pins. If you see the light on the PAS sensor, then I would check which pins on your VESC you have wired the sensor to. The Vesc source code makes it so that by default the Rx and Tx pins are where it looks for PAS signals. but its possible Makerbase changed the vesc firmware source code. and made it different. Especially if makerbase has some kind of a display that also connects to Rx and Tx, they may have remapped that. Its a problem within the VESC source code, i dont know why they used Rx and Tx as the PAS input pins, beacuse RX and TX is what displays use. It could be a number of things TBH, i ended up writing a script for PAS in VESC that I never completed but it could potentially help you debug which pins your PAS sensor is going to, Send me an email if you delve into it further. RU-vid never sends me notifications for replies

I won’t try to do much more than 40 mph on a 750w motor especially if its not dual motors. I have a 1000w bafang hub. But 750s can have less copper abs smaller magnets. And motor connectors that handle less continuous amps

yeah, its a concern, i had the throttle go wide open one time with my flipsky and i have no idea why, could have been the throttle But im really not sure, im lucky i was able to grab the bike quickly and lift it up. and then managed to just disconnect the battery

Yeah don’t really use PAS myself. I got tired of ghost pedaling years ago, it leads to repetitive stress injuries. I would rather use the throttle. And if i want to pedal i use the throttle when i need some motor power. However People have been asking me about PAS in VESC so i wanted to try it and see what is available

I think the pulsing was because I was going above, and below, that minimum 6 pedal RPM, and it was the Upramping and Downramping. that was kind of pulsing, I think if there was no ramping it would have been jerking on and off abruptly

I think the code for PAS is just weird unusual logic yes, the behavior is not typical, I will find some way to improve it

Yeah i am not sure why those are the default pins for pas, i thought those were for a display

sure that would be super helpful Mate! I am messing around with the LISP VESC scripting right now. i'm ebikebuilder at protonmail dot com