This page describes how to wire up RepRap Version II `Mendel`. Before you wire the machine up, test the circuit boards individually as described on this page. This is the overall Mendel wiring diagram; click the image for a full-resolution version. The wiring diagram is stored as an [ Eagle ] schematic in your download at mendel/electronice/mendel
Click here to download the full size of the above Circuit.
-wiring-diagram. sch. The latest version is in the [ RepRap subversion repository here ], but that may be an unstable version in development. In the diagram above multi-way connections are shown as thick lines with a number next to them. The number is the number of wires in the connection. Numbers in brackets are the lengths of the wires in centimeters. Thin wires are single wires. The power wiring is not shown on the diagram for clarity, but it is very simple. The 12 volts from the Mendel USB and power connector is connected in parallel to the three stepper driver boards and to all the extruder controller boards. The Motherboard does not need to be connected to Mendel`s internal power connectors. It is powered by the USB connection from the computer. The extruders are connected in parallel to the RS485 and to the SDA and SCL ports on the Motherboard. The system only has four connectors for these on the Motherboard, but you can chain these together up to any reasonable number (in theory it should be possible to drive 64 extruders at once. ). The picture immediately above is looking into the socket (female) and at the pins (male). Pin 1 is the ground (negative) connection and pin 2 is +12v connection. Pin 3 is not used. Mendel has a panel-mounted male plug connector. Use wires of different colours that are capable of taking 8 amps. If your wires are not twisted or paired you can easily twist them up yourself by putting one...
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