PAS with a huge hub motor? weird probelm

[ebike11]

Hi guys!
I have the qs205 motor with a single speed freewheel because I wanted to remove the shifters.
Of course with such a heavy motor on a steel frame, its quite hard to pedal. Im basically using the throttle 90% of the time anyway however, there are sometimes that Id like to pedal and also to conserve battery power when the battery gets low. So I installed a Grin PAS 12pole to the Cycle Analyst. The PAS isnt engaging even though the P and T toggle icons are moving as well as the red light on the sensor constantly flickers when the pedals turn. I set the PAS at 2 wire, Basic "power", 12 poles. I switched between 5V - REV and vice versa but still nothing. I set the start up "watts" to 500. Should this be changed?
Would there be any other setting I should adjust? The PAS is brand new. Would such a large motor have some affect on the PAS?
Thanks!!

 

[ebike11]

Hi guys!
I have the qs205 motor with a single speed freewheel connected to the CA3 and Grin Pas
Of course with such a heavy motor on a steel frame, its quite hard to pedal. Im basically using the throttle 90% of the time anyway however, there are sometimes that Id like to pedal and also to conserve battery power when the battery gets low. So I installed the PAS which is 12pole to the Cycle Analyst. The PAS isnt engaging even though the P and T toggle icons are moving as well as the red light on the sensor constantly flickers when the pedals turn. I set the PAS at 2 wire (should this be 4 wire since the cable/connectors have 4 actual wires???), Basic "power", 12 poles. I switched between 5V - REV and vice versa but still nothing. I set the start up "watts" to 500. Should this be changed?
Would there be any other setting I should adjust? The PAS is brand new. Would such a large motor have some affect on the PAS?
Thanks!!

 

[rowbiker]

Change the startup watts to zero, or even a negative number, until you confirm the boost from PAS. Then start bringing up the startup watts to suit your needs.

 

[ebike11]

Change the startup watts to zero, or even a negative number, until you confirm the boost from PAS. Then start bringing up the startup watts to suit your needs.

Ok I will...is it even possible to put the watts in negative?

 

[DogDipstick]

Yes: 500 w starting means you have to physically produce 500w before the CA begins to pulse the throttle feed.

I can barley make 200w contin.

I have it set to 35w. Once i begin to pedal more than 35w, the tq sensor begins feedin in power. 500w is way to uch to star the pulse.

 

[ebike11]

Post deleted

 

[ebike11]

Hi guys...im using a external shunt with my sabvoton 72200. Im using the green wire from the shunt which runs to the controller. Positive and negative are not used on the controller side according to the diagram.
However at the handlebars..i have the basic 3 wire twist throttle running to the CA.
When I connected all 3 throttle wires to the CA connector..I just got a 1 second surge with the bike and barely moved..then I connected just positive and negative throttle wires WITHOUT green connected and no signal.
May i ask what is the correct way to wire the actual throttle to the CA throttle connector?
Thanks!

 

[DogDipstick]

Hi guys!
I have the qs205 motor with a single speed freewheel because I wanted to remove the shifters.
Of course with such a heavy motor on a steel frame, its quite hard to pedal. Im basically using the throttle 90% of the time anyway however, there are sometimes that Id like to pedal and also to conserve battery power when the battery gets low. So I installed a Grin PAS 12pole to the Cycle Analyst. The PAS isnt engaging even though the P and T toggle icons are moving as well as the red light on the sensor constantly flickers when the pedals turn. I set the PAS at 2 wire, Basic "power", 12 poles. I switched between 5V - REV and vice versa but still nothing. I set the start up "watts" to 500. Should this be changed?
Would there be any other setting I should adjust? The PAS is brand new. Would such a large motor have some affect on the PAS?
Thanks!!

If start up watts are "500", you will never feel any motor pulse until you are able to go "500w human output" continually.

This number denotes when the PAS begins. When this number of (human) watts are genorated through the crank turning, the PAS will engage.

I am a 175lb, 5'11 1/2, strong young man, who can lift 100-150lbs off the ground at my feet to over my head, and climb a tree with only my hands, do upside down push ups and work 12-15 hours contin without problem...

... BUT I can only make about 200w contin ( sweating like a pig) and PEAK @ 400w ( for less than a few instants.. ) on my bike. If you have it set to and you can never make "500w", and can only make "200w" then the PAS will NEVER engage.

Look here: Pedaled my ass off and only made 336w PEAK!!!!. Lower it to 30w-50w... Even if i am making 30w the power come sin and overwhelmes my PAS engagement, too, so consider lowering current to accommodate the low power/long range idea. On max I pull 8Kw but on "legal" I pull 700w... total.. and here is the only mode that lets me pedal with any actual power input to the ride.

 

[DogDipstick]

I might be wrong. What do you have the CA set to, ie "Basic(pwr), Basic"(thr)" or "Torque"?

i use Torque, and what I above wrote applies to me. From the ca3 manual:

The Setup PAS Configuration menu determines how the CA3 responds to the pedal sensor input signals. There are three basic types of PAS control available.

Basic (Pwr): In this mode, the CA3 attempts to produce a constant power output in watts when pedaling is detected, and this power can be scaled to increase or decrease with pedal RPM as well. This is the most common mode of PAS assistance with basic PAS sensors.

Basic (ThO): This is a somewhat different approach to PAS where the CA3's throttle output voltage is held constant rather than the target power level. With normal PWM motor controllers this mode results in each PAS set point having an approximate wheel speed rather than motor power.

Torque: This mode is only available if a torque sensor is configured in the PAS device setup. When selected, the CA3 attempts to mirror the human power on the pedals with motor power on the wheel, giving proportional torque control. The assist level is set by a multiplier on the human power, and for most riders a max setting of 2X to 4X the human power level is about right. The Start Level parameter in this case sets a minimum humaneffort requirement before the motor kicks in.

I use #3? What do you have yours set to? Disregard what I said if it is #1 or #2.

What is the "+ (X) watts/rpm" that you have set in the CA3? This affects motor use.

Sorry if I am confusing you more. Just trying to help. Lol.

https://www.ebikes.ca/documents/CycleAnalyst_V31_Web.pdf

 

[NCC1941]

May i ask what is the correct way to wire the actual throttle to the CA throttle connector?
Thanks!

All of the CA3 connector pinouts, including for the throttle, are shown here: https://www.ebikes.ca/product-info/cycle-analyst-3.html#cables-and-connector-pinouts