Re: [CAD_CAM_EDM_DRO] Re: Encoder and read out

Well, considering the OP was trying to replace a tape measure, a cheap
caliper would probably work just fine. However, you can buy
stand-alone single axis digital readouts which use the same scales as
the multi-axis versions, just with an integrated display. I know that
Mitutoyo makes them and I'm pretty sure other companies do as well.

On Wed, Oct 15, 2008 at 3:10 PM, gcode fi (hanermo) <yahoog@...> wrote:
> Calipers are nowhere near good enough.
> I have a 100 cm caliper.
>
> Its rated to be upto 0.06 mm out ... and still in spec.
> Its nowhere near good enough for machining - for my uses.
> It beats a ruler ... but not much better.
>
> You need a real machine scale ...
>
> Alan Marconett wrote:
>>
>> OK, although I have an 18" digital caliper, I wouldn't want to use it for
>> such. Still, if it was cheap...
>>
>> Get a Sherline encoder and put it on the leadscrew? They have the display
>> as well. May not be that cheap.
>>
>> A small PIC or AVR demo board with a display could be put into service to
>> read the encoder (easy to do) and convert to inches or whatever you'd
>> like.
>> All it takes is a little code...
>>
>> Alan KM6VV
>>
>> --- In CAD_CAM_EDM_DRO@yahoogroups.com
>> <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>, "Alan Marconett" <KM6VV@...>
>> wrote:
>>
>> > Find a cheap import digital caliper, and mount that on your table.
>>
>> Er, Alan, the table moves through 17"
>>
>> Dave
>>
>
>