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Stepper motor driver

 
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snow

Bascom Member



Joined: 28 Jun 2005
Posts: 166
Location: Ashburton / Mid Canterbury / New Zealand

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PostPosted: Sun Nov 20, 2005 9:12 am    Post subject: Stepper motor driver Reply with quote

Howdy All
I'm looking at making a CNC mini engraver. I was woundering if any one has done anything with stepper motor drives using a bipolar stepper motor. I want to use this type as the torque figures are pretty good and i have some lying around. I will be using step and direction form my PC parallel port. and using an avr 8535 for the interface driver.
Any pointers would be welcome.
Cheers
Snow
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Luciano

Bascom Member



Joined: 29 Nov 2004
Posts: 3149
Location: Italy

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PostPosted: Sun Nov 20, 2005 9:47 am    Post subject: Reply with quote

Hi,

Stepper power board based upon L6208 circuit:

Stepper bipolar command (4 wires)
Maximum current 2.5A per phase
Mode : 1/2 step (Or full step, see pin 12).
Bridge control : 'Slow decay' (see datasheets)
Command Step/direction
Power supply unstabilised, but rectified and filtered, maximum 32V
Power supply stabilised, maximum 40V.

http://www.otocoup.com/CarteL6208_e.htm#Specif

====================

Same but from Italy:

http://www.robotfactory.it/CncBoard/StepperBoard.htm

Schematic: (English)

http://www.robotfactory.it/CncBoard/Schema_board_P.jpg

====================

Some notes:

- The L6208 has indipendent Signal and Power Ground.

- Beware to never shutdown the signal power supply (+ 5V) before
the stepper power supply, that will destroy power circuits.

- Cooling fan mandatory.

Best regards,

Luciano
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snow

Bascom Member



Joined: 28 Jun 2005
Posts: 166
Location: Ashburton / Mid Canterbury / New Zealand

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PostPosted: Sun Nov 20, 2005 8:10 pm    Post subject: Reply with quote

Thanks Mate, will look into it Very Happy
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Duval JP

Bascom Member



Joined: 22 Jun 2004
Posts: 923
Location: France

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PostPosted: Sun Nov 20, 2005 9:14 pm    Post subject: Reply with quote

hi,
a module of system "Extralink" is very powerfull, speed, acceleration, step counter, switch of end,
another one is DC motor with encoder
They are available :

[url]www.sidena.com [/url]

Regards
JP
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robpar

Bascom Member



Joined: 18 Feb 2005
Posts: 32
Location: Vancouver BC

PostPosted: Mon Nov 21, 2005 5:24 am    Post subject: Reply with quote

I have used a motor controller from Gecko, their web site is http://www.geckodrive.com/. This uses step and direction and
will do multi stepping etc.

I am using their products to control my telescope motors with great success. In my research there were a number of people using these controllers for CNC conversions. They use simple step and direction input and have models for both stepper and servo systems. Give them a look they are reasonably priced.

Bob Parry
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bzijlstra

Bascom Ambassador



Joined: 30 Dec 2004
Posts: 1179
Location: Tilburg - Netherlands

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PostPosted: Mon Nov 21, 2005 9:20 am    Post subject: CNC... Reply with quote

Have a look at http://members.home.nl/bzijlstra/hardware/stepper/stepper.htm
at the bottom.....

We are working on the PCB's and the software in Bascom-AVR now.

Have fun
Ben Zijlstra
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