Garage CNC - A gantry style machine design

[irving2008]

Please don't hijack other people's threads, start your own. Suggest you do so and delete this then I'll answer your question.

Hi there all CNC'rs,
Coming from a technical background due to my father, I was always interested in automatic/computer control for machines.
My interest is actually the electronic part of the projects.
I have semi-finished a table top cnc, to be used as an engraver in my friend's jewellery shop.
The driver boards were home made using a 4070 Ex-Or ic, 4027 Flip-Flop and L298 H-bridge driver
I have tested movements with 4 wire stepper motors running at 12 volt/0.3A, recovered from old plotters.
The results look ok but now I have to move on!
In South Africa I can get hold of Nema17-3.7V/1.68Amp stepper motors.
I am planning to use a beefed-up 5 volt supply but with current limit, set at approx 1.2 amp.
My question, if some-one can perhaps help is the following;
Will the L298 H-bridge be able to except a supply voltage of 5 volt/1.2Amp and drive the 3.7 volt stepper.

I don't want to buy the low voltage steppers and discover that it does not work.

Thank you forum group in advance

Danie

[AndyGuid]

Please don't hijack other people's threads, start your own. Suggest you do so and delete this then I'll answer your question.

Probably better still to start at the very beginning and not have an advanced build thread like this in the "New Member Introductions" section?

But really, this is nothing more than VERY New Members finding their way around........ Please give peace a chance .......

[Lee Roberts]

Probably better still to start at the very beginning and not have an advanced build thread like this in the "New Member Introductions" section?

But really, this is nothing more than VERY New Members finding their way around........ Please give peace a chance .......

On the money there Andy, not sure why Irving replied in such an abrasive way, must of been having a bad day or something?

Will do the moderating on this thread shortly and make any adjustments, will start you a fresh one Dan.

.Me