Because those things are EXPENSIVE.
Don

>Why go to such trouble with a slotted disk, if you can buy a ready made
>encoder, ball bearings, 3 years warranty?
>Wagner
>
>Donald L Burdette wrote:
>>
>> Wagner Lipnharski wrote:
>>
>> >I always wanted to suggest to do a surgery at the
>> >motor, and transform it into a pulse generator.
>>
>> Wagner -
>>
>> Why go to such trouble, when a simple slotted disk will provide the
same
>> effect?
>>
>> Don