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1  Using Arduino / Motors, Mechanics, and Power / Re: Arduino appears to slow motor down on: February 08, 2013, 05:24:11 am
I see what you mean.

However, When I run the motor fast, by shorting the clock input, I don't use the arduino. If I connect the arduino and upload a basic sketch, it also slows the motor down. This is why I suspect it's the arduino slowing it down as opposed to Labview

What do you think?

2  Using Arduino / Motors, Mechanics, and Power / Re: Arduino appears to slow motor down on: February 07, 2013, 11:42:42 am
Sorry for the slow reply.
How would I find ouot how fast the labview code is passing pulses to the motor controller?
It really is a massive difference as to how fast the motor goes.

MarkT - I appreciate the reply,how would I go about doing that? I've just got the arduino sketch that allows labview to communicate with it and haven't edited it at all.

Cheers
3  Using Arduino / Motors, Mechanics, and Power / Arduino appears to slow motor down on: January 29, 2013, 09:18:15 am
Hello,
Relatively new to all of this but here goes:
I have:
Arduino Duemilanove
RSSM2 Stepper Driver card.
Astrosyn Y129 Stepper Motor

I have connected it all up and written a program in labview to control it. All seems to be working, however I notice I get a very small maximum speed from the motor. When I disconnect the arduino, and use the RSSM2's internal clock (by shorting the step rate input to the output) I can control the speed by the variable resistor. This gives a much greater max speed.
Is it the arduino that is slowing the speed down?
Any help appreciated.

Basically all i'm doing is sending high signals to the input via a labview loop. Another high/low signal controls direction and a high signal goes to the DIS input when my loop is complete, which in turn shuts off the motor.
4  Using Arduino / General Electronics / Newbie questions on: November 14, 2012, 05:19:12 pm
Hello,
Just getting started with arduino but haven't quite got that far yet.
i'm sure it's probably been asked before but I'm trying to control a stepper motor throught arduino.
Specfically, this stepper motor : http://uk.farnell.com/astrosyn/129/stepper-motor-1-8deg-12v/dp/9598642

But before I can do this, I'm trying to build a stepper motor driver circuit. I have next to no electronics experience which is why it's proving difficult.

I have a L6219 (http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00000092.pdf)
and a breadboard. I have been reading vague tutorials all night but can't get my head around it. Does anyone know any basic tutorials for getting started that I could look into? Or does anyone have any useful circuit diagrams or anything?

Any help appreciated.
Cheers
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