Grin Phase Runner / CA3 and BBSHD

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Daxxie   1 W

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Re: Grin Phase Runner / CA3 and BBSHD

Post by Daxxie » Nov 01 2018 4:02am

Fastwanabe wrote:
Oct 31 2018 11:57pm
I'm encountering the same issue the OP had, "Judder" while re-applying the throttle. OP fixed it with the CA but I don't have one. I emailed Grin and this is what he suggested......

"There are two ways............................................ the values of 2500 and 2.5 will be more appropriate".

I have yet to do this since my rear derailleur was destroyed while the motor was "juddering". I will recieve my rear derailleur this Saturday and will report back. What suggestions do you guys have? Thanks
Grin also gave me the same suggestions when I asked how to solve my judder problem.
I played a week with those settings and that didn't help at all.

The Phaserunner has a serious judder problem in combination with BBSHD /Ultra and apparantly also BBS02.
Someone at Grin should have a serious look into that issue!

Raising the minimum voltage in the CA so that the motor is always engaged cures most of the judder symptoms.
But it's just a workaround for a bad design / bad settings?

Anyway, you don't have the CA so that setting will not help your judder.
But maybe you could try the following:

The Phaserunner has a "Throttle start Voltage setting" (Under Advanced / Throttle + Brake Parameters)
Try lowering that to a value that is under the min. voltage out of your throttle. (my throttle is around 0.9V on idle)
For example 0.8V, that should always engage your motor. Maybe that could solve it?

Keep us posted.
Last edited by Daxxie on Nov 03 2018 5:12am, edited 1 time in total.

endrew   10 mW

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Re: Grin Phase Runner / CA3 and BBSHD

Post by endrew » Nov 01 2018 4:10am

For 74V, just set the Kp and Ki values to 1 and 10 (see image). You can use larger values for lower voltages.
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Fastwanabe   1 mW

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Re: Grin Phase Runner / CA3 and BBSHD

Post by Fastwanabe » Nov 01 2018 12:54pm


The Phaserunner has a "Throttle start Voltage setting" (Under Advanced / Throttle + Brake Parameters)
Try lowering that to a value that is under the min. voltage out of your throttle. (my throttle is around 0.9V on idle)
For example 0.8V, that should always engage your motor. Maybe that could solve it?

Keep us posted.
I tried that too but the setting below 1.00 won't save. I just gives me a comm error.

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Daxxie   1 W

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Re: Grin Phase Runner / CA3 and BBSHD

Post by Daxxie » Nov 01 2018 6:23pm

Fastwanabe wrote:
Nov 01 2018 12:54pm
I tried that too but the setting below 1.00 won't save. I just gives me a comm error.
Well, it was worth a try.

StinkyGoalieGuy   100 W

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Re: Grin Phase Runner / CA3 and BBSHD

Post by StinkyGoalieGuy » Nov 01 2018 11:33pm

endrew wrote:
Nov 01 2018 4:10am
For 74V, just set the Kp and Ki values to 1 and 10 (see image). You can use larger values for lower voltages.
If by "judder" you mean where hitting throttle causes the motor to spin an full throttle and take up the slack in the drive train too fast, then user endrew's settings work great. You have to set "current regulator bandwidth" on the basic setup tab to 0 rads first.

I have uploaded my Phaserunner configuration settings file here: https://app.box.com/s/5i25dk2loqgkvv4gjzdd77bgw11tnugk

Currently, I'm hitting 25MPH using a 30T front ring to a 40T rear cog, single speed setup. That is really low gearing. That allows me to climb a 34% slope with no pedaling at about 12MPH. This is using a saggy 21s4p battery. This is the best setup I have ever had. I just need to setup a more robust drive train. When I get some time, I'm going to a 38T front with more offset to a 50T in the back. That will fix my chain line issue.

Fastwanabe   1 mW

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Re: Grin Phase Runner / CA3 and BBSHD

Post by Fastwanabe » Nov 03 2018 12:34am

WOW, just WOW guys. You people rock. After applying a few settings you guys and Justin suggested I finally got rid of the "juddering".
These were the settings that fixed it for me. No CA, BBS02B, 52volt pack 29AMPS and 48 tooth chainring. Speed 38 MPH. THANK YOU SO MUCH GUYS.
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StuRat   100 W

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Re: Grin Phase Runner / CA3 and BBSHD

Post by StuRat » Nov 03 2018 2:13am

Lovely. Thanks for letting us know.

Have you got a better description/video of the juddering? I'm not sure. Mine does some sort of judkud under throttle in too high of a gear, but otherwise silent.

Fastwanabe   1 mW

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Re: Grin Phase Runner / CA3 and BBSHD

Post by Fastwanabe » Nov 05 2018 10:02pm

Since people are messaging me asking for the XML ill just post it here.

https://drive.google.com/file/d/1FWQlYI ... sp=sharing

Just click on the download button on the top right and it'll save on your PC as an XML file. Only difference between this file and the screenshot is that the field weakening was set to 35 amps. Use at your own risk.

cyclebot   1 µW

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Re: Grin Phase Runner / CA3 and BBSHD

Post by cyclebot » Nov 06 2018 6:43pm

Hi.
I'm mostly done installing a CA3-DPS and Phaserunner using the plug-and-play BBSHD cable from ebikes.ca and I have a couple questions:

1) Everything in the wiring harness makes sense to me except the 3-pin Throttle Input connector. Why would the throttle input to the CA3 be running down to the BBSHD?

2) From reading this thread I understand that the PAS sensor in the BBSHD needs 5V, not 10V as provided on pin-1 of the Torque/PAS connector. Does pin-1 need to be swapped internally in the CA3 to a 5V pad?

3) Does question 1 actually answer question 2? :idea: (In other words, is the throttle connector just being used for the 5V supply to the PAS sensor? And if so:

3a) If I want to use a throttle, will I need to make a small modification to the harness (or build an intermediate splitter) to wire in a throttle? Note: I already have a potentiometer going into the Aux In, which I'm intending to use for quick PAS adjustments.

Thanks!

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justin_le   10 MW

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Re: Grin Phase Runner / CA3 and BBSHD

Post by justin_le » Nov 09 2018 2:32am

cyclebot wrote:
Nov 06 2018 6:43pm
3) Does question 1 actually answer question 2? :idea: (In other words, is the throttle connector just being used for the 5V supply to the PAS sensor? And if so:
Exactly, except that this was meant more to plug into the Aux input instead of the throttle input. We figured more people these days are using the digi aux buttons instead of the potentiometer and the digiaux wiring allows both to be plugged in.
3a) If I want to use a throttle, will I need to make a small modification to the harness (or build an intermediate splitter) to wire in a throttle? Note: I already have a potentiometer going into the Aux In, which I'm intending to use for quick PAS adjustments.
Correct. We are looking to update this cable harness spec so that there is a 5V regulator inline with the 10V power from the PAS plug. Then it will automatically step down the 10V from the CA to the 5V needed by your PAS sensor and you won't need to find a 5V tap. We might actually have these PCB's arriving pretty soon and will be able to send them out by themselves you want that neater solution.
Currently recovering from the Suntrip race on a back to back tandem solar powered row/cycle trike. 550 watt solar roof, dual Grin All Axle hub motors, dual Phaserunner controllers, 12 LiGo batteries, and a whole wack of gear.

Now back in Vancouver with my Big Dummy Frame (yes This One, thanks ES!) with Grin all-axle front hub, Phaserunner controller, and 52V 19Ah Cellman triangle pack
My website: http://www.ebikes.ca
Please contact via email, info@ebikes.ca, rather than PMs, which are disabled

cyclebot   1 µW

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Re: Grin Phase Runner / CA3 and BBSHD

Post by cyclebot » Nov 09 2018 11:50am

Excellent! Thanks Justin. That makes sense. So 10V could be supplied by the 6-pin CA-to-Phaserunner plug, and the 5V regulator could actually be housed under the BBSHD cover. That'd be slick. If you guys have a connectorized version of this ready soon I'll probably pick one up from you, but if not then I may just wire in my own 5V regulator. That would keep the wiring up by the CA3 that much cleaner.

-Jesse

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