Open Hardware
Assembly Instructions

Before testing can begin, firmware must be uploaded to the Control Box via the USB port on the rear of the chassis.
Connect a North American Power Cable to the receptacle located on the bottom rear of the chassis.
Connect the USB Cable from the Workstation Computer to the USB port on the rear of the chassis.
Power on the Control Box

Open CuraLE From the top menu bar select settings > printer > manage printers Make sure "LULZBOT TAZ Pro Dual Extruder" is selected from the list of printers. Add it if needed. From the menu, select "Upgrade Firmware"
From the resulting dialogue, select "Automatically upgrade firmware".

Begin by powering on the connected unit to be tested and the Control Box Test Stand

The following checks must be performed BEFORE starting the test gcode:
1. Check thermistor values:
Hot End 1 should read 211C
Hot End 2 should read 191C
If the values listed above are reversed or no value is shown (0) the unit has failed testing and must be reworked. In this case, the two thermistor connectors inside the unit are connected incorrectly. Return the unit to an ESD safe work area, remove the Electronics Cover, and verify correct connector locations. See (link to pin out diagram)
2. Check bed thermistor value:
Should read close to room temperature in degrees C, if no value is shown, verify external connection before returning the unit to an ESD safe work area for rework.
3. Check E1/E2 Fans:
Both heat sink fans (labeled E1/E2 and located on bottom panel of CB Test Stand) should be spinning any time the unit is powered on. If either of these fans is not functioning the unit has failed the test and must be reworked. After returning the unit to an ESD Safe work area and removing the cover, verify the tool head power connector is pinned correctly and properly connected. See Pinout Diagram
4. Actuator function:
The actuator test located on bottom right of the test stand is used for visualizing proper function of the actuator circuits. Both indicator should rest within the green zones in either position. To cycle between positions, select MENU > Change Filament and use the 1 & 2 buttons at the top of the display. The left actuator should be at the top when number 1 is selected. When number 2 is selected, the left actuator should lower and the right raise to the top.
If an actuator fails to move, return the unit to an ESD Safe work area for diagnosis.
5. LCD Screen:
Verify that the touch screen is installed straight in relation to the chassis, use straight horizontal lines of the GUI to reference against sheet metal. Does it look straight? If it is determined to be crooked, return the unit to an ESD Safe work area for rework. 6. Case Fan: Verify that the case fan is blowing air OUT from the rear of the case. A sticky note or other small piece of paper may be used to verify direction of flow.

After selecting “Print” the unit will chime and begin the test gcode by homing the X axis, the motor should begin by spinning counter-clockwise.
Press and release the X-Min button on the left of the CB Test Stand within 10 seconds or the unit will report “Homing Failed” and the test must be restarted from step 5.
This emulates the X bump stop on the printer.
The X Motor should now slowly turn clockwise and then turn very fast clockwise.

Failure conditions:
If the X Motor moves clockwise first, the motor is wired incorrectly.
If the motor fails to move at all, check external connections first.
If the X Motor jiggles or twitches, this is indicative of poor connection on one of the individual wires of the motor lead.

In the event that the above failures occur and are not rectified by checking connections, return the unit to an ESD Safe work space for diagnosis and repair.

The Z Motors will now begin moving simultaneously, the left one turning clockwise and the right turning counter-clockwise.

Press and release the Z-Max button TWICE on the left side of the CB Test Stand within 10 seconds and one immediately after the other or the unit will report “Homing Failed” and the test must be restarted from step 5. This emulates the Z Max switch on the printer.
The motors should now spin rapidly the opposite direction.

Failure conditions:
If the Z Left Motor moves counter-clockwise first, the motor is wired incorrectly.
If the Z Right motor moves clockwise first, the motor is wired incorrectly.
If the motor fails to move at all, check external connections first.
If the Y Motor jiggles or twitches, this is indicative of poor connection on one of the individual wires of the motor lead.

In the event that the above failures occur and are not rectified by checking connections, return the unit to an ESD Safe work space for diagnosis and repair.

Immediately following actuation of the probe button, the E1 Motor on the test stand should begin moving counter-clockwise.
If the motor moved clockwise first or failed to move it is not wired correctly and the unit has failed the test.
To confirm the motor moved counter-clockwise and proceed with the test, press the PROBE button.

The motor will now spin clockwise.
To confirm and proceed with the test press the PROBE button.

The 24v fan on the CB Test Stand should now be spinning at 40%, it will then speed up to 100%
If the fan doesn’t turn on, the unit has failed the test. Check external connections to the CB Test Stand before returning the unit to an ESD Safe work area for diagnosis and rework.

The fan on the right panel of the CB Test Stand labeled ”H-E2” should now turn on.
If the fan did not turn on the unit has failed the test and should be returned to an ESD Safe workspace for diagnosis and repair.

If the unit completes the test gcode, a happy tune will play.

On the LCD, touch “Endstop States”

In the lower left corner is the filament sensor status.
Press the “TOGGLE” button on the Control Box Test Stand
Verify that the light flashing corresponds with the correct section flashing on the control box.
If light “1” is flashing on the test stand, FIL_RUNOUT should be flashing on the LCD.
If light “2” is flashing on the test stand, FIL_RUNOUT2 should be flashing on the LCD.
Continue to toggle through the modes;
Power on mode: no pulse
1st mode: pulse number 2
2nd mode: pulse number 1
3rd mode: pulse both together
4th mode: pulse both alternately
5th mode: both ON
6th press returns to no pulse

If the incorrect light flashes or either of the POWER LEDs have failed to illuminate, the unit has failed testing and must be returned to an ESD safe work area for diagnosis and repair.

After the machine has powered back on and displayed the boot animation, navigate back to interface settings and select "Customize sounds"
Menu > Advanced Settings > Interface settings > customize sounds

Set the options in the menu to the following:
Click sounds on
Print Starting: Twinkle
Print Finished: Fanfare
Print Error: Sad Trombone

Navigate back to the main screen, saving settings when prompted.