digitising arm Digest Number 889
Posted by
Patrick Huss
on 2000-11-16 07:05:39 UTC
Has anyone here ever used microscribe? I have, and it was in the top ten
MOST frustrating things I have ever tried. It is capable, if I recall
correctly, of measuring to .011" accuracy. But you hold it in your hand,
which doesn't even come close to the kind of stability required to keep the
scribe steady. Using a probe on a cnc machine, or a laser range finder (not
interferometer), will always be IMO a more reasonable experience. As
Ballendo pointed out in his response re: steppers vs. servos - 'Accuracy is
a function of the system design.'
If your hand is an integral part of the system design, accuracy is
nonexistent. If anyone is seriously considering creating their own
digitising arm, I highly recommend that you use one to digitise an object,
you may have to fight a strong urge to throw the device out the window!
Patrick
MOST frustrating things I have ever tried. It is capable, if I recall
correctly, of measuring to .011" accuracy. But you hold it in your hand,
which doesn't even come close to the kind of stability required to keep the
scribe steady. Using a probe on a cnc machine, or a laser range finder (not
interferometer), will always be IMO a more reasonable experience. As
Ballendo pointed out in his response re: steppers vs. servos - 'Accuracy is
a function of the system design.'
If your hand is an integral part of the system design, accuracy is
nonexistent. If anyone is seriously considering creating their own
digitising arm, I highly recommend that you use one to digitise an object,
you may have to fight a strong urge to throw the device out the window!
Patrick