Re: [CAD_CAM_EDM_DRO] Re: case histories
Posted by
Eric Keller
on 2000-04-05 14:01:24 UTC
Jon,
All this talk about encoders has me wondering what really is required. Are
all of your encoders direct coupled to the ball screws on your mill? I
always figured i was going to get linear encoders, now i'm not sure. If you
get prescision ball screws, you are going to have to go to the high accuracy
linear encoders to beat the shaft encoder
If you think about it, people use the indicator dials on the handles of
their mills to make parts all the time, so what is the difference really
between slapping an encoder directly on the shaft. Granted it's always nice
to have more accuracy, but you pay for it.
I've seen the discussion of the wire driven rotary encoder used as a linear
encoder, but i never got that type of mechanism to work too well for me.
eric
For example, see
Jon Elson's interesting home page at:
All this talk about encoders has me wondering what really is required. Are
all of your encoders direct coupled to the ball screws on your mill? I
always figured i was going to get linear encoders, now i'm not sure. If you
get prescision ball screws, you are going to have to go to the high accuracy
linear encoders to beat the shaft encoder
If you think about it, people use the indicator dials on the handles of
their mills to make parts all the time, so what is the difference really
between slapping an encoder directly on the shaft. Granted it's always nice
to have more accuracy, but you pay for it.
I've seen the discussion of the wire driven rotary encoder used as a linear
encoder, but i never got that type of mechanism to work too well for me.
eric
For example, see
Jon Elson's interesting home page at:
> http://www.artsci.wustl.edu/~jmelson/Machining.html