Re: [CAD_CAM_EDM_DRO] Machine mounted Tachometer with Surface Meter Per minuteThis

Yeah, I know, I will have to take the plunge: open up the router, install
something (?) and make hole in the body for the sensor but I was hoping
(secretly) someone would come up with a way to derive the actual speed from
router's internal speed control electronic. ;-)
Gaston

On 2010-09-09 21:00, Tony Smith wrote:
> Routers go up to 30,000 rpm. You can put a 10x divider in between the
> sensor& tachometer, so for every 10 pulse the sensor receives, the tacho
> gets one. Something like a 4017 decade counter chip would do. The tacho
> would say 2,500 when the router is doing 25,000.
>
> Most of the handheld tachometers bounce IR off a foil sticker added to the
> object, or they paint half the item black& half white and the sensor picks
> that up. You could put that on the collet, but it's a bit impractical.
>
> You'd need to drill a hole in the housing, and add something to the armature
> itself. Magnets& hall effect sensors are common for this type of thing,
> optical is too unreliable due to dust. Optical may be ok inside the router
> body.
>
> Tony
>
>
>
>> The range is one problem but the main one is what type of sensor and
>> where would they be attached to the router? Anyone know of a tachometer
>> for
>> router?
>> Gaston
>>
>> On 2010-09-09 15:33, Dan Mauch wrote:
>>> Sorry but my Tachometer will only go to 9999 RPM and most routers are
>> a lot
>>> faster.
>>>
>>> Dan
>>>
>>>
>>>
>>> From: CAD_CAM_EDM_DRO@yahoogroups.com
>>> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Gaston Gagnon
>>> Sent: Thursday, September 09, 2010 11:01 AM
>>> To: CAD_CAM_EDM_DRO@yahoogroups.com
>>> Subject: Re: [CAD_CAM_EDM_DRO] Machine mounted Tachometer with
>> Surface Meter
>>> Per minuteThis
>>>
>>>
>>>
>>>
>>>
>>> Dan,
>>> Many of us use routers with no outside pulleys that the sensors could
>>> attach to.
>>> Would you know of any way to measure the actual speed of routers?
>>> Gaston
>
>
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