The Bridgeport that you retrofitted, did you use PPMC, or did you use the
PCI card type of interface? Aren't there advantages to using the PCI card
type for encoder counting? I'm trying to determine the best practical
approach.

Terry

On Sun, Jul 4, 2010 at 9:03 AM, Terry Neilson <[email protected]> wrote:

> I should not have worded it as gear reduction. There are no gears, only
> ratio reduction by belts. The Y belt is fairly long, it has the typical
> setup with the motor mounted parallel to the y axis below the knee. The X
> motor is mounted in a way that should make an easy mounting of an encoder at
> the end of the lead screw like you suggested.
>
> Terry
>
>
> On Sun, Jul 4, 2010 at 12:44 AM, Jon Elson <[email protected]> wrote:
>
>> Terry Neilson wrote:
>> > Jon,
>> > I accidentally missed this reply, I'm new at this.
>> > The plate on the motor is old and difficult to read. The Ohms probably
>> are
>> > .8. There is a 2.75 gear reduction to the screw. The lead screw is 5 TPI
>> .
>> > Rapids are now 100 IPM, so max. motor rpm must be around 1375 RPM.
>> >
>> GEAR reduction, or do you mean a timing belt?  Gears are trouble, unless
>> they have an
>> anti-backlash mechanism.  Belts are fine if they are short and can be
>> tensioned well.
>>
>> Jon
>>
>>
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