No subject

better, a cheapie
pwm radio/control type as someone else mentioned is ideal. However, some
years ago
I had to recalibrate the speedo on a vl calais turbo and found I could
move the
rotating magnet assembly further or closer to the reluctance wheel, so if
you have any pickup at all anywhere on the rear - or even front then you can
try this trick instead,
regards
mike

At 05:46 PM 20/10/2012, you wrote:
>I have tested a smaller stepper motor, but it was too slow.
>
>Have ordered a non geared stepper motor which has a spec sheet that says
>its good for 500 PRM and will try again.
>
>Stepper motors are torquey at very low RPM, so if this motor will turn the
>speedo, I will keep going with it.
>
>Be interesting to see whether the stepper or a DC motor system works best.
>
>Hugh
>
>
>
>
>Normally it's going to be 1000 turns\mile.? Dials out to be 60MPH as well.
>Some British speedos are different, but are usually marked in tiny script on
>the face.
>Jim
>
>-----Original Message-----
>From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org] On
>Behalf Of jayjunk at laserpubs
>Sent: Friday, October 19, 2012 9:23 PM
>To: diy_efi at diy-efi.org
>Subject: Re: [Diy_efi] Stepper Motor to drive mechaical speedo
>
>Ok - is there a standard revs/mile for a speedometer/odometer?
>The only thing I found so far is for a Vincent motorcycle!
>(1600 rev/mile)
>
>cheers...
>
>On 10/19/2012 5:04 PM, jayjunk at laserpubs wrote:
>> Funny- I was going through my garage and found my stash of gauges.
>> I found a 120 mph mechanical speedo (SW style) that will be just fine
>> for my mutant Corvair.
>> Now I need to look around for a DC motor with enough grunt to drive the
>> speedo!
>>
>> cheers
>> Jay
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