[SciPy-user] instrumentation control question

C.J.Lee@tnw.utwen... C.J.Lee@tnw.utwen...
Mon Nov 12 12:26:06 CST 2007

Well actually it is a DC motor that is controlled via a USB "block" that can be used to drive either stepper motors, DC servos, or piezos, or a combination (depending on the number of channels)

I have discovered where the dlls are hidden but have not managed to drive it using ctypes (I have had success with this using a different motor control/motor combination)

I will take a look at andrew's web site.


PS John, sorry for the double email but I didn't reply to the list on the first occasion

-----Original Message-----
From: John Hassler [mailto:hasslerjc@comcast.net]
Sent: Mon 11/12/2007 7:00 PM
To: Lee, Chris (TNW); SciPy Users List
Subject: Re: [SciPy-user] instrumentation control question
I've used ctypes to access .dll libraries, but I've never used activex.  
Andrew Straw has written a very nice library for Measurement Computing 
hardware.  Perhaps something there would be useful:

Do you have a hardware stepper driver, or are you trying to do it all in 

Chris Lee wrote:
> Hi, I know this is a bit off-topic but I wondered if anyone here had any 
> experience with the following problem.
> Part of our work involves controlling a bunch of lab instrumentation, 
> which so far has worked beautifully using python + scipy/numpy + pyVISA. 
> Then we got a stepper motor which does not comes with an activeX control 
> and (as far as I can tell) nothing else.
> This means using the com extensions for win32 and trying to communicate 
> with the activeX control. All is not progressing well (we can find the 
> control but send no data to it, and it certainly won't talk back to us). 
> Does anyone have any experience with this? If so, would you mind sending 
> me some code snippets for gaining control of the activeX element?
> Thanks very much and my appologies for the not-so-on-topic post (I 
> actually think instrumentation control would be a great addition to 
> scipy and if I become competent may look at contributing code in that 
> direction).
> Cheers
> Chris
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