Testing The Board; Quick Start - RepRap Minitronics v1.1 Quick Start Manual

Locate the trimpot next to the stepper driver. Turn it fully to the left (1) to disable
the current. Then turn it about 45 degrees to the right (2). This should allow the
axes to move. If you are loosing steps during the print, you may need to increase
the current a bit. If the stepper is shutting down while printing, the chip is
probably getting to hot. Decrease the current of add extra cooling to the board.

Testing the board

To test the functionality of the board, a test firmware is available from the product
page. This firmware will help you test the board. Disconnect everything except
the USB cable to your computer. Upload the the test firmware to the board
with Arduino, the blue debug LED should blink every second. By using the serial
monitor in Arduino the board will provide an output like:
T1 1023 T2 1023
These values represent the resistance measured from t1 and t2. When you
connect a thermistor to the pins, the corresponding value in the serial monitor
should change to about 890.
By connecting the 12V line, the MOSFETs should have power and their LEDs will
blink in order. This verifies the MOSFETs and 12V power are OK.
Also the stepper motors should turn when connected, with the 12V lines and
stepper wiring in place. They will turn a short time and switch direction.
These three tests will verify the basic functionality of the board.

Quick Start

This paragraph will show you how to connect the board. This is just a basic
example, your requirements may differ. There is a lot of community support
available in the RepRap forums http://forums.reprap.org. By placing your
questions there other users may benefit of the information too.
Minitronics v1.1 Quick Start Guide
Version 1.2
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