3dxl
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Impressive work on the clutch function. Love how you mount dual side by side battery.
REVIEW: QR-E 250W ELECTRIC BOOSTER BICYCLE MOTOR AND B60i AND B70 BATTERY
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3dxl
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Looking good! Any videos of mechanism in action?
3dxl
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Troubleshooting old QR-E PRO (V1)
Hey guys, i manage to dismantle the old QR-E PRO and access to the main board. Found out the possible reason why it has a problem; looks like there's a hole burned in the middle of the PCB board. Looks like the whole unit controlled from one single board hard epoxy into the case. Will contact Mr. Jason the Qiroll support to see if it has parts for this.
Photos:
Hey guys, i manage to dismantle the old QR-E PRO and access to the main board. Found out the possible reason why it has a problem; looks like there's a hole burned in the middle of the PCB board. Looks like the whole unit controlled from one single board hard epoxy into the case. Will contact Mr. Jason the Qiroll support to see if it has parts for this.
Photos:
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3dxl
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The burned part probably some MOSFET (ESC) or related. Morning before the QR-E PRO (old V1) breaks down; i ride to work i felt like the bike was 20% accelerate faster than usual and when ever i pedal it seem lighter and easier than before...felt no friction, that felt good!! Then evening when i ride back from work the QR-E PRO started to sputter going on-off with the throttle and 10 minutes down the road it shut down. So much for a 2 year old unit.
Btw the new QR-E PRO (V2) seems to perform very well on my 2nd road bike after running for few week. Seems to be as fast as my V1, more quite/silent and less resistant when pedaling beyond 46km/h. Was thinking getting PRO V2 to replace old V1 but i wonder if warranty still cover my V1 else get discount over my broken unit. I've already contacted Jason but waiting for their engineer to reply.
kenz
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Sadly i bought PRO as i saw your review only to receive the new version which have poor assist even at power mode,it's easier to ride without having it contact the tyre as there is resistance even at bare minimum contact using the 3M friction tape.
3dxl
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Hi kenz,
If this was your first PRO then nothing wrong with the assist performance. Its still very powerful for something lightweight at 320W. I still love my new PRO on my 2nd build its very silent and still fast. Its just that i have so much attachment for the older PRO version for being responsive. I'm a performance cyclist so i'm very sensitive to small changes between each model, so i demand instant response when i press the throttle button. For normal rider or commuter you won't feel much differences between the old and new. Today commute have been extremely wet and muddy on the road, new QR-E PRO performed well without slipping.
Video: Today rainy ride on QR-E PRO V2.
Video: Sunny day speedy commute on QR-E PRO V2.
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3dxl
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Latest updates on the old QR-E Support: Will receive another PRO unit replacement.
So i received reply from the Jason the Qiroll support; the engineer says that the spot that looked like a burned hole on PCB circuit board was actually a window epoxy point, its a place or hole where they start squirting/insert epoxy resin for waterproofing i think. I still have my doubts though, next few days i'll try to pry out the board off the plastic case and see more details behind it soon. So its work in progress trying to detect the fault.
The good news is i will receiving a replacement or backup unit from their old demo/exhibition unit (used) to replace my old QR-E PRO. I'm not sure if its the "New (V2)" or the "Old (V1)" Pro unit but they will sending out soon to my place. Once arrived i'll try again to see if both PRO unit performed equally and narrow down what factor makes one bike faster than another. Its possible my white MERIDA perform faster since its very aero and less wind resistance than my SHOGUN BADASS (Specialized Diverge) bike. However both bike weight almost the same at 10kg.
So i have to give thanks to Mr. Jason and Qiroll support team for helping to troubleshoot and send me a backup/replacement unit.
*Now that one hell of customer support all the way right there. Awesome! Thank Qiroll!
So i received reply from the Jason the Qiroll support; the engineer says that the spot that looked like a burned hole on PCB circuit board was actually a window epoxy point, its a place or hole where they start squirting/insert epoxy resin for waterproofing i think. I still have my doubts though, next few days i'll try to pry out the board off the plastic case and see more details behind it soon. So its work in progress trying to detect the fault.
The good news is i will receiving a replacement or backup unit from their old demo/exhibition unit (used) to replace my old QR-E PRO. I'm not sure if its the "New (V2)" or the "Old (V1)" Pro unit but they will sending out soon to my place. Once arrived i'll try again to see if both PRO unit performed equally and narrow down what factor makes one bike faster than another. Its possible my white MERIDA perform faster since its very aero and less wind resistance than my SHOGUN BADASS (Specialized Diverge) bike. However both bike weight almost the same at 10kg.
So i have to give thanks to Mr. Jason and Qiroll support team for helping to troubleshoot and send me a backup/replacement unit.
*Now that one hell of customer support all the way right there. Awesome! Thank Qiroll!
Qiroll has come through for you in the past, keep us updated.
Here's my Qiroll on its current bike. I like this convenient location on the seatstays best but not enough room for the spring hinge that I was hoping to use. Belt sander friction layer still holding up and not slipping on the Schwalbe Billy Bonkers, not ridden in wet conditions yet.
Here's my Qiroll on its current bike. I like this convenient location on the seatstays best but not enough room for the spring hinge that I was hoping to use. Belt sander friction layer still holding up and not slipping on the Schwalbe Billy Bonkers, not ridden in wet conditions yet.
3dxl
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Glad your sander friction tape holding up. I'm having wet rainy weather this month, thankfully mines also holding up with perfect torque going up the hills. Your Qiroll behind seat stay above is ideal to keep the dirt and grimes away from road surfaces. All my small short frame doesn't have space above the triangle.
Btw how are going to add manual clutch from that position?
Without the spring hinge a "clutch" to retract the motor wouldn't work. I might still do that with the spring hinge on the bike it was on previously with the Qiroll located beneath the chainstays - which is the only place it will fit on that bike, with or without using a spring hinge.
3dxl
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When i opened the Qiroll unit the cavity area inside the plastic case where the roller pivot attached i think you can make mini size spring hinge insert into it for more cleaner looks. But takes lots of craft works to compress the spring inside. Just think of the same spring that recoils rear derailleur gears cage can fits inside that case.
3dxl
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Looks cleaner and well sealed. Any feel of extra motor performance with thicker gauge wires?
Btw have you measured the battery voltage health after prolonged used? Wish Qiroll added Digital LCD display to show actual voltage level like Bafang does instead of LED bars.
I'm not aware of a performance difference but I've been mostly riding with only the default "electronic clutch" setting rather than the two higher settings actuated with the button control. There is a decent boost with only electronic clutch and I don't even have to pedal at low speed with that setting. 16g wire has over 1.5x the cross sectional area as 18g and depending where I mount the battery I can use a cable 1/3 the length of the 24" Qiroll cable. So I guess resistance should be proportionally less. Soldering 16g wire on the tiny MD30 connectors is tedious but doable. The connectors might be the main cause for resistance, I don't know. I haven't kept track of mileage vs residual battery voltage. A voltage monitor could be wired on the power cable easily enough using positap connectors to splice in but I'm not currently inclined even though I have one in a parts bin.
I still want to use this bike on the Palouse to Cascades rail to trail path but I buggered my knee hiking some steep trails in the Columbia River gorge and currently walking with a cane so I'm not sure how that will go.
I still want to use this bike on the Palouse to Cascades rail to trail path but I buggered my knee hiking some steep trails in the Columbia River gorge and currently walking with a cane so I'm not sure how that will go.
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