If in those same tight quarters you stop activating the throttle and bump the pedals, isn't it just as dangerous? It seems like there's several solutions available to mitigate that already in the PAS settings. Especially on a bike with a torque sensor.Having throttle deactivate PAS is very handy when navigating peds, handling intersections, etc where precise control is necessary and an extra push on the pedals might otherwise cause an unwanted power application in tight or dangerous quarters. The alternative would be to force the user to manually deactivate PAS in these situations which would be an invitation to mishap.
2v/s is very slow for a DownRate. Although you may have achieved one goal, I think you need to explore other setup strategies that don't so markedly interfere with the stop-pedal delay.kevinscargobike wrote: ↑May 11, 2018 1:17 pmThanks! Those settings did help quite a bit. I moved my PAS up rate from 4 v/s to 2 v/s, and the down rate from 4 v/s to 2 - but to be honest, I find it pretty unnerving when the motor pushes for more than a second after I've stopped asking it to. There's probably some combination of a middle ground value and just time getting used to it.
PAS will not engage unless you actually pedal - 'bumping' the pedals does nothing.
That's helpful! I changed that and the throttle mode at the same time. I'll try going back to 4 v/s down and seeing if the throttle mode alone does the trick. It's less clear to me what I'd do with wgain - there's no weird oscillating if I'm all throttle or all PAS, so it seems like it's probably fine.2v/s is very slow for a DownRate. Although you may have achieved one goal, I think you need to explore other setup strategies that don't so markedly interfere with the stop-pedal delay.
My point was that if your protection from accidental PAS acceleration is that you have the throttle activated, that safety goes away as soon as you let to of the throttle, which may well still be in a crowded situation.PAS will not engage unless you actually pedal - 'bumping' the pedals does nothing.
The default values should work fine. However, if the % shown on the AuxA Preview screen does not go from 0-99% as the pot is turned min to max then follow one or both of the procedures below:
How can I use these features to get a conservative throttle ramping from a standstill but a quick one while riding?• FastRate is similar to UpRate and is typically set to a faster rate. Values of 4-8V/s are typical.
• FastThrsh sets current at which the CA switches from FastRate to UpRate.
• If FastThrsh = 0.00A, FastRate is ignored and UpRate is always employed, otherwise:
• When current is less than FastThrsh, the CA uses FastRate to quickly advance Throttle OUT to the point where the motor is bearing load. When already underway, this shortens the ramping delay that would otherwise occur if using the slower UpRate ramping.
• When current is equal to or greater than FastThrsh, the motor is bearing load and the CA switches to UpRate to apply slower ramping.
FastThrsh should be set higher than the current necessary to accelerate the unloaded wheel to maximum rpm. This is always greater than the maximum unloaded current. Setting the current too low will cause the CA to prematurely switch to UpRate. Typical DD values are 0.5-1.0A, gear motor values are typically 2-4A.
Although you don't specify which beta version you are using, you should really upgrade to the production 3.1 release which has the issues repaired that were discovered in the beta versions.
FastRate is really designed to be of assistance with drivetrains employing a freewheel clutch so the motor could spin up to speed rapidly and then regular ramping would take over after the clutch engages. There is no mechanism in the CA to alter UpRate at speed.brickwall wrote: ↑May 16, 2018 4:20 amI had to employ strict throttle ramping to prevent the bike from flipping backwards when accelerating from a standstill so it's no longer dangerous and takes off smoothly, but that also means a sluggish throttle response when riding. I think I should use UpRate and FastRate for this, but I'm not sure how to set them. The UUG seems to suggest they are used for the opposite purpose:
How can I use these features to get a conservative throttle ramping from a standstill but a quick one while riding?
Done and done! I just brought out my bike after a long Swedish winter.
I use power throttle in one of my three modes, for smoother acceleration. I will experiment with current throttle to see if that's even better. The really dangerous bit is passthrough throttle with no power limiting. Fun, but scary.teklektik wrote: ↑May 16, 2018 10:34 amI suggest that you switch to Current Throttle so the throttle control is more disciplined at low speed which should not require such strong UpRate limiting. You will need to adjust AGain which will again have effect over the entire speed range - low values can make the throttle a little laggy so it's a balancing act.
This is probably what I should do, though I need to open up the controller and do some soldering in order to be able to program it. I love the simplicity of the CA.teklektik wrote: ↑May 16, 2018 10:34 amA complimentary strategy is to reduce the phase current limit of your controller which will only have effect at very low speeds. By reducing the aggressive motor behavior at low speed, you won't need such aggressive settings in the CA and CA operation won't have such an adverse effect at higher speeds. Although reducing the available motor torque off the line (max phase amps) may seem Bad, if you are suppressing use of it through CA settings, then the high phase current limit isn't really being used anyway - you're just limiting it indirectly via the CA and paying a price for making the CA do the controller's job.
Great this worked out. That said, I'm a little surprised that Current Throttle worked better than Power Throttle - they are essentially the same but Power throttle can work better for saggy batteries to keep throttle performance more constant over the discharge cycle.
You're right. I've been tweaking WGain quite a lot but I don't remember even touching AGain since I haven't enabled current limiting or throttle until now. In other words, I should be able to achieve the same results by going back to power throttle/limiting and reducing WGain a bit. Maybe to the same level as AGain is currently at?
Yep - that's the ticket.
while reading that: any update on "slow rate" feature? you remember? applying only a little throttle for really powerful middrives until all the drive train slag is gone, and then apply full throttle.teklektik wrote: ↑May 16, 2018 10:34 amFastRate is really designed to be of assistance with drivetrains employing a freewheel clutch so the motor could spin up to speed rapidly and then regular ramping would take over after the clutch engages. There is no mechanism in the CA to alter UpRate at speed.
http://thesuntrip.forumactif.org/t510-p ... ar-ca-code (images load very slowly)