Allegro SLA7072MR Chips?

[Micro Rotors]

I am wanting to make a driver board for a CNC router and a U2 mini mill and a CNC foam cutter and I have 4 of these chips (Allegro SLA7072MR). Will they work?

[Micro Rotors]

?

[epineh]

Looks like they will, unipolar drivers, up to 3 A and support microstepping. You just have to make up a PCB and you are on your way.

I assume you have read a little on this thread...

http://www.cnczone.com/forums/showthread.php?t=24699

Same manufacturer, different chip that uses external N-channel Mosfet's to drive larger motors, I am looking at something similiar as those guys, mainly as it's bipolar and supports higher current configuration's (externally from the chip though...)

Let us know how you go.

Russell.

[Micro Rotors]

epineh,

Thanks for your reply!

No, I will start reading it right now. I am new to making a setup like this and I have not tried soldering IC chips such as the A3986. Is there a tutorial on driver boards out there that explain their function or a tutorial on putting a kit together?

Bill

[epineh]

No tutuorials as far as I know, but the thread I mentioned will give you an idea of the process involved. One of the biggest hurdles is the soldering the chip and making the PCB to start with, I don't have any experience with either (yet) but I have started on the PCB side of things...

http://www.cnczone.com/forums/showthread.php?t=30951

And for soldering the SMD components I was thinking :

http://www.engadget.com/2006/03/07/h...oldering-iron/

It is all a work in progress but I will have a build log of it around here somewhere once it is up and running.

Russell.

[phantomcow2]

I believe Dave from HobbyCNC uses those chips. They are Allegro at least.
I would just buy his board rather than make one, It is pretty tough to beat the price
http://www.hobbycnc.com