RE: [CAD_CAM_EDM_DRO] Hi I'm new

Hi, David:

According to the specs, these motors are rated at 22 oz-in. That's not very
much for CNC applications, so I'd probably pass on them.

Now, to answer your question - you can probably use your printer port to
drive them.

However, I'd question whether Windows is a good environment and Visual Basic
is a suitable tool. My primary concern is the speed at which you can send
information to the output port. If you're using a timer component, you'll
find that the best granualrity is 1 millisecond (yielding a 1Khz step rate)
which is most likely too slow a pulse rate, unless you write your own
ring-zero driver to handle actually sending a pulse train to the motor
driver.

Windows strength is the ease at which you can create a human interface. Its
weakness is real time processing, which is what's required to drive stepper
motors. You need two attributes - the ability to send a relatively fast
pulse train (8000 - 25000) is reasonable and the ability to send a robust
pulse train (i.e. there is little or no jitter in the pulse train).

You might want to try TurboPascal in a DOS environment for your first
attempts. Perhaps, you'll work with windows after you get something working
in the DOS environment.

-- Jerry

|I like the idea making my on little CNC. I'm new to this as the
|subject states.
|
|So, hello to you all!
|
|Can someone please help, look at this link:
|
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=26226&item=1923926449
&rd=1
|
|....and tell me if I can send signals to that board via my paralell
|port and make the motor move, or do I need something else? I just
|want something cheap to play with right now.
|
|Thanks to all!
|David
|
|
|
|
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