Pas sensor - metal ring

[KirstinS]

My unfitted PAS sensor consists of a plastic ring with magnets and a separate sensor itself with metal ring and leads to controller.

Can this metal ring be cut and remain so and still work ? Ie if , when fitted, the ring is no longer completed but has a few mil gap does this stop the pas working ?

 

[helecats]

My unfitted pad sensor consists of a plastic ring with magents a the sensor itself with metal ring. Can this metal ring be cut and remain so and still work ? Ie if , when fitted, the ring is no longer completed but has a few mil gap does this stop the pas working ?

I got no instructions with my kit but your supposed to fit the sensor on the RHS. There was no way I was going to mess about removing the bottom bracket there was no room anyway with 3 chain rings. So I put it on the LHS. Just dremeled the hole in the ring so it fitted over the bottom bracket, took the LHS pedal off and stuck the ring with sensor in place with silicon sealant. Oh I had to turn the sensor round by 180 deg by drilling the ring and refitting the sensor as LHS pedal turns the wrong way. As for the question on cutting the ring then I don't see why cutting it would make any difference I've read that some people remove the sensor from the ring and stick them in place.

 

[Alan Quay]

On mine, which sounds similar, the metal ring is just to mount the sensor (presumably a reed switch) on to the bottom bracket. As far as I know it has no electrical or magnetic characteristics that are relevant to its operation.

 

[flecc]

You can cut the ring which is just a mounting, it won't affect the operation of the sensor.

 

[KirstinS]

I'd hoped it was just a mounting and not part of the sensor - I'm also looking to fit it without removing the BB and put on other side.

Excellent news!

 

[Marctwo]

The non-drive side of the BB usually comes off quite easily so the biggest hassle is just getting the special tools required (crank remover, BB remover). It may end up be more hassle trying to bodge it in place securely.

 

[jackhandy]

Try the magnet ring in place before refixing the crank:

They have a particular direction of rotation & you may have to turn it so that the "wrong" side faces the sensor.

 

[Deleted member 4366]

The sensor is the bit of plastic with the wire coming out. The rest is just a bracket. You can make your own bracket and fix it either side. The important thing is that it must end up close to the magnet ring.

 

[KirstinS]

Try the magnet ring in place before refixing the crank:

They have a particular direction of rotation & you may have to turn it so that the "wrong" side faces the sensor.

I tested it, tested again, and then again

Then I used Sugru to fix the magnet ring and then also fixed sensor in place. Left overnight to dry

Got up this moring to test the final product. Which worked perfectly as long as I backpedal furiously.

I'm SO cross with myself ! Not even sure how I managed this after testing so many many times

On the positive note its the first time I've seen my motor go round in weeks

And paul at 8fun has finally agreed my panel is bust and is sending me a new one (witha throttle switch) and a new powerlead. So I can go to being the throttle jockey I am. I'll come back to the PAS when I can be calm about it !

Thanks for all help here

 

[Scimitar]

I tested it, tested again, and then again

Then I used Sugru to fix the magnet ring and then also fixed sensor in place. Left overnight to dry

Got up this moring to test the final product. Which worked perfectly as long as I backpedal furiously.

LOL!
Reminds me of a mate who built a trike based on a Yamaha XS1100. Painstaking build, it was, very careful and time-consuming. Then he got on it and made to move it for the first time. He had five reverse gears.

 

[bilabonic]

Is it actually worth fitting PAS if you have throttle control ?

I have a full BAS kit on order on order and still not sure what to fit.....

What is Sugra ???

Any pics of the install, think there should be a dedicated thread to this install like the torque arm one.

Cheers

 

[jackhandy]

Is it actually worth fitting PAS if you have throttle control ?

IMHO the key word here is control:

I personally find it difficult to keep the power delivery steady with a thumb throttle & full-grip throttles are just plain horrible.

So, for me, it's pas on the road & keep the throttle for on the mucky stuff.

 

[mxer125]

Half grip throttle's give much better control, would never have full or thumb throttle's again..As for Pas in my opinion they are dangerous till you get used to them

 

[103Alex1]

I tested it, tested again, and then again

Then I used Sugru to fix the magnet ring and then also fixed sensor in place. Left overnight to dry

Got up this moring to test the final product. Which worked perfectly as long as I backpedal furiously.

I'm SO cross with myself ! Not even sure how I managed this after testing so many many times

On the positive note its the first time I've seen my motor go round in weeks

And paul at 8fun has finally agreed my panel is bust and is sending me a new one (witha throttle switch) and a new powerlead. So I can go to being the throttle jockey I am. I'll come back to the PAS when I can be calm about it !

Thanks for all help here

LOL. I really do empathize - there have been a few similar moments recently with my box sides when I glued bits on back to front ... before realizing on getting to the last piece I'd have to break apart and re-do it ... So easily done especially at night. The 4-hour set time of the stuff I was using and inability to clamp properly made for some more than a little 'frustrated' scenes. Have since 'moved on' to 20-minute setting 2-part Araldite to do a stage all in one evening ... but can't afford to make mistakes with that or I'll be remaking the whole blasted thing. Again !

 

[103Alex1]

Is it actually worth fitting PAS if you have throttle control ?

I have a full BAS kit on order on order and still not sure what to fit.....

What is Sugra ???

Any pics of the install, think there should be a dedicated thread to this install like the torque arm one.

Cheers

Make a double-throttle with one as a cruise control. They're pretty great things and not really difficult to make (with the right guidance !) just a bit fiddly. - I definitely couldn't ride long distances on a thumb throttle and this basically sorts out a constant speed option with no thumbs needing to stay on any throttles ! Provided you have a brake cutoff, just apply the brakes and switch over to normal thumb throttle when you need to vary the speed or ride on a conventional throttle (like in town, at traffic lights etc..

If you use a 3sp switch, the middle switch setting effectively acts as a throttle 'off' switch. Useful when you come to a stop and are fiddling around with the bike before turning it off. The 2nd throttle has spring removed and your bike grips allow any setting within the throttle range to be selected.

There's info on one of d8veh's threads and I posted some pics of the process on mine. Info from about Post 30 onwards and some preamble before about why I chose to make one :

http://www.pedelecs.co.uk/forum/electric-bicycles/13813-cst-its-all-working-3.html

If you make one, do make sure you've trial fitted the 3sp switch on your handlebars first to see which way round it's going - especially if you have bulky shifters which can interfere with its position. I wired it up to have the switch below the handlebars and wound up having to fit it with the switch above them. This meant I switched left for the throttle on the right & vv. I wound up taking the whole thing apart and reversing the switch wiring... figured if I didn't one of these days I'd get distracted and run the bike into the nearest *****.

Sugru is this stuff : The future needs fixing - the future needs fixing - sugru

It's blooming great stuff Used it to make a double socket deans plug off the battery - one outlet for controller and the other for accessory wiring joined at the back by a solder bridge. It's an electrical insulator so completely protects and insulates the unit. Very handy for other awkward sealing and bonding jobs where you don't want to use an epoxy, which gets brittle and has no flex.

 

[Deleted member 4366]

Is it actually worth fitting PAS if you have throttle control ?

I have a full BAS kit on order on order and still not sure what to fit.....

What is Sugra ???

Any pics of the install, think there should be a dedicated thread to this install like the torque arm one.

Cheers

Yes, but don't fit one to a high power bike unless you can change the levels of PAS. You can put a switch on the signal wire or red 5v wire to switch it on/off if your controller/panel doesn't already have that. PAS makes your bike much easier to ride. You need brake switches if you fit PAS because of the delay in the motor stopping.

Sugru is a repair material use Google!

 

[Ajax]

I tested it, tested again, and then again

Then I used Sugru to fix the magnet ring and then also fixed sensor in place. Left overnight to dry

Got up this moring to test the final product. Which worked perfectly as long as I backpedal furiously.

I'm SO cross with myself ! Not even sure how I managed this after testing so many many times

On the positive note its the first time I've seen my motor go round in weeks

And paul at 8fun has finally agreed my panel is bust and is sending me a new one (witha throttle switch) and a new powerlead. So I can go to being the throttle jockey I am. I'll come back to the PAS when I can be calm about it !

Thanks for all help here

Just a thought, but did you try reversing the connections to the controller? Sometimes the controller
socket is a match for the pedlec sensor plug, whilst the pedlec sensor is actually wired differently. You can usually push the pins out the plug and swap em over.

 

[Charliefox]

Yes, but don't fit one to a high power bike unless you can change the levels of PAS. You can put a switch on the signal wire or red 5v wire to switch it on/off if your controller/panel doesn't already have that. PAS makes your bike much easier to ride. You need brake switches if you fit PAS because of the delay in the motor stopping.

Sugru is a repair material use Google!

I have the 350W Bafang CST motor with handlebar throttle and the E-Bike LED-810 Meter Display which can vary power. I am also fitting a small handlebar mounted on/off switch (Ebay [URL='http://rover.ebay.com/rover/0/e11401.m3696.l6464/7?euid=f05bfb5dfb2b46f6909306966c8fb064&loc=http%3A%2F%2Fpayments.ebay.co.uk%2Fws%2FeBayISAPI.dll%3FViewPaymentStatus%26transId%3D632799869023%26qu%3D1%26itemId%3D361107054348%26ssPageName%3DADME%3AX%3AOU%3AGB%3A6464&exe=11489&ext=28032&sojTags=exe=exe,ext=ext']Universal Motorcycle Scooter Quad ATV Dirt Pit Bike Kill ON-OFF Button Switch ) right next to my RH Brake lever (Disc) So I hope all works without the hassle of fitting a 'fierce' peddle sensor! On a completely different note I had thought for years that Loctite was the ONLY 243 Threadlocker.Not so, far cheaper ones are available. Not much point in buying more than 10 ml as it has a 1-2 year lifespan. Less if it goes below 8 degrees which my garage has been since the start of 2015! And I wondered why the usual light blue had turned a watery dark colour![/URL]