Stage 07: Wiring

The control board used in the Proforge 3 is the SKR 2 board by BigtreeTech.

More information about it can be found here.

The entire wiring diagram can be found at the bottom of this guide.

Check that the jumper is set to VDD.

Make sure the jumpers under the steppers are positioned as shown.

You will need to pull the other jumpers out, so you have just one connected at each stepper location, as shown.

Fix the Y-Endstop to the top panel.

M2.5 x 12mm

M2.5 Nyloc

Route the cable down the 2040 extrusion.

Optional - Use electrical tape to better secure and hide the cable.

Connect the Y-Endstop to the control board.

Fix the filament sensor cable to the filament sensor.

Route the cable along the side of the top panel. Use cable ties to secure.

Route the cable down the 2040 extrusion. Use electrical tape to secure it in place.

Connect the filament sensor to the control board as shown.

Connect a motor cable to the X/Y Motors and route them down the side of the 2040 Extrusion.

Use electrical tape to hide and secure in place.

Connect the motor cables to the control board.

Left Motor

Right Motor

Stick the LED strip light to the inside front of the top panel.

Route the cable down the front right side. Again, use electrical tape to hide and hold the cable in place.

Wire the LED's directly to the power supply.

Red to positive

Black to negative

Connect the remaining two motor cables to the two z-axis motors.

Connect the other side to the control board.

Connect the X-Endstop to the control board.

This is the endstop cable from the tool carriage wiring loom.

Connect the Hotend heater to the control board.

The connector can actually be pulled out of the board to make connecting the cables easier.

You will need a small flat head screw driver for this step.

Connect the thermistor to the control board.

Connect the hotend cooling fan cable to the control board.

This is the cable that you marked earlier in the direct drive stage of the assembly.

Connect the part cooling fans to the positions show.

A fan can be connected to either spot.

Connect the brown cable from the probe directly to a positive terminal on the power supply.

Connect the black and blue cable from the probe to the control board in the position shown.

Before beginning, make sure that you have earthed yourself (by touching a large metal object) to avoid the chances of static damage.

Prepare the four TMC2209 stepper drivers by removing them from their packaging and securing onto them their heat sinks as shown in the first image.

Make sure the heatsink is not touching any of the pins.

Orient the fins of the heatsink as shown.

Mount all four of the TMC2209 Stepper Drivers to the control board as shown.

When installing, match the orientation of the drivers as shown, the green side of the stepper should go onto the red side of the mounts on the board.

Installing a stepper driver the wrong way round will destroy it.

Finally, use cable tie mounts to clean up the cables.

Begin by taking the touch screen case and insert four M3 x 12mm bolts through the four holes shown.

Place onto each of these bolts an M3 x 5mm spacer.

Begin by removing the black control know from the front side of the screen, it should simply pull off.

Align the touch screen with the case and drop it onto the four bolts.

When you drop the touch screen into the case, you'll find that the control knob side will stick up.

Thread on two M3 x 10mm threaded spacers to the two bolts on the left as shown.

With the left side secured, thread on two M3 x 10 threaded spacers to the remaining two bolts.

Hold the bolts from the underneath to prevent them from falling out.

Fix the mounting plate onto the back of the casing as shown.

M3 x 6mm bolt

Push the control knob back back on.

Attach the touch screen case assembly to the base of the printer as shown.

M4 x 10mm bolt

M4 Washer

M4 Nyloc

Black cable: This is for controlling the printer through the touch screen interface via serial.

The two white cables are for controlling the printer directly via marlin's interface through emulation mode.

EXP 1

EXP 2

Black cable - board side.

Note the orientation of the loose connector and the 4-pin connector, match as shown in the third image.