Cateye question

[shinobi]

Hi
I found a couple of old Cateye Mity cordless computers in one of my parts boxes the other day so thought i might bung one on my commuter , So i put new batterys in it , tried it on the bench working fine , fitted it , spun the wheel worked fine , actually ride the bike and it doesnt work !!! ive tried both units and its the same , works spinning it up by hand but not on the road , what is going on

 

[foz]

Sensor too far from the magnet?

 

[hamster]

I've had the same problem over the years:
1 The plastic computer mount bends if tightened too far on the bars, leading to unreliable connections to the head unit - maybe refit less tightly, or with a bit of double sided tape behind to stop it rotating on the bars while fixing more loosely. This is especially bad with the zip-tie types.
2 Wiggle the head unit to get it to connect
3 Interference from HR monitors etc, some cheap lights can be very bad for interference.

 

[shinobi]

Sensor too far from the magnet?

Yes i have tried that , even tried another magnet in desperation ! the mad thing is it works fine if you spin it up stationary

 

[shinobi]

I've had the same problem over the years:
1 The plastic computer mount bends if tightened too far on the bars, leading to unreliable connections to the head unit - maybe refit less tightly, or with a bit of double sided tape behind to stop it rotating on the bars while fixing more loosely. This is especially bad with the zip-tie types.
2 Wiggle the head unit to get it to connect
3 Interference from HR monitors etc, some cheap lights can be very bad for interference.

Thats an idea , i will try that on the way home

 

[shinobi]

Thats an idea , i will try that on the way home

I've had the same problem over the years:
1 The plastic computer mount bends if tightened too far on the bars, leading to unreliable connections to the head unit - maybe refit less tightly, or with a bit of double sided tape behind to stop it rotating on the bars while fixing more loosely. This is especially bad with the zip-tie types.
2 Wiggle the head unit to get it to connect
3 Interference from HR monitors etc, some cheap lights can be very bad for interference.

Ah just thought , its cordless so no connections !!

 

[hamster]

I had exactly that with one - it worked OK next to the wheel sensor but not on the bars. I also had it with a Parrot car kit. Certainly fitting decent quality batteries (Duracell) helped. But on the Cateye I gave up.

 

[shinobi]

I had exactly that with one - it worked OK next to the wheel sensor but not on the bars. I also had it with a Parrot car kit. Certainly fitting decent quality batteries (Duracell) helped. But on the Cateye I gave up.

You were right about the light !! as soon as switch on the led front light it cuts out

 

[hamster]

Hmm, interference. No easy solution. You could try a ferrite cable shield on the power cable if it's one with a remote battery.

ZCAT1325-0530A | TDK Openable Ferrite Sleeve, 25 x 20mm, For Suppression Components, Apertures: 1, Diameter 5mm | RS

uk.rs-online.com

 

[shinobi]

Hmm, interference. No easy solution. You could try a ferrite cable shield on the power cable if it's one with a remote battery.

ZCAT1325-0530A | TDK Openable Ferrite Sleeve, 25 x 20mm, For Suppression Components, Apertures: 1, Diameter 5mm | RS

uk.rs-online.com

I’m going to move the bracket along the bars a bit