Unipolar Stepper with GEN7

Hallo

I'm new in the forum and i want to build a wolfstrap.

Because I'm student i don't have much money so i must save money.

First i would like to buy this Stepper.

And i will build the GEN7 electonic and now i don't know which driver i can buy or how i can build me a very cheap driver.

I'm sorry for my bad english.

Sesi41

This motor has six wires, so it can be operated bipolar.

60 ohms is a lot, though. You'd need 60 volts to reach 1 ampére, which is about the minimum current required to get decent tourque. Given you find such a power supply, Pololus/StepSticks/TB6560s are specified for 35 volts, only.

Better motors have somewhere between 1 and 5 ohms.

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Generation 7 Electronics	Teacup Firmware	RepRap DIY

I think Unipolar can be used for really low-torque (or slower with some gears) reprap such as printrbot or huxley...

I don't know what you think but a driver based on a ULN2003/ULN2803 controlled by a small uC (pic 12F or avr tiny) could reproduce the pololu behaviour. You could easily program some halfStep.
(The first control board were like that, I mean with some uC : DarwinStepperController 1.2
Ok, 60Ohm is a lot but some 36/40Ohm should work.

It's just an idea, I just guess...Stop me if I'm wrong...

Edited 1 time(s). Last edit at 02/21/2012 09:08AM by Ghunt.