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Each component in the electronics and wiring category has its own unique tests.

Power Supply

Test Description Target Tolerance
Brand Inspect the name plate for the brand name. WEHO N/A
Model Inspect the name plate for the model number. LPVF-150-24 N/A
Input Inspect the name plate for the input specs. AC 100-265V
50/60Hz
N/A
Input cable length Measure the lenght of the input cable using a tape measure. 30cm +/- 3cm
Input plug Inspect the input plug. 3-prong stand US plug N/A
Output Inspect the name plate for the output specs. DC 24V
DC 6.25A
150W
N/A
Output cable length Measure the lenght of the input cable using a tape measure. 20cm +/- 3cm
Output connector Connect the output cable’s screw-together connector to a power supply cable. Should connect as expected N/A
Waterproof Inspect the name plate for waterproof rating. IP67 N/A

Power Supply Cable

Test Description Target Tolerance
Length Measure the cable’s length using a tape measure. See BOM spec +/- 3cm
Diameter      
Cable      
Connector 1 Connect the cable to the Farmduino’s 24V POWER IN connector. Should connect as expected N/A
Connector 2 Connect the cable’s screw-together connector to a power supply. Should connect as expected N/A
Color Inspect the part’s colors. Black cable
Red Molex connector
N/A

Raspberry Pi 3

Test Description Target Tolerance
Model Inspect the board for model number. Model 3B+ N/A
Brand Inspect the board for the brand name. Raspberry Pi N/A
Condition Inspect to ensure the product is not used or refurbished. Product should be brand new N/A
GPIO pins Inspect the GPIO pins for damage. No pins should be bent N/A

MicroSD Card

Test Description Target Tolerance
Brand Inspect the card for the brand name. SanDisk N/A
Capacity Inspect the card for capacity rating. 8GB N/A
Condition Inspect to ensure the product is not used or refurbished. Product should be brand new N/A

Pi Adapter Board

Test Description Target Tolerance
Pins Inspect the pins for damage. No pins should be bent N/A
RTC battery Ensure the RTC battery is inserted. Included N/A
Color Inspect the color of the PCB. Matte black N/A

Push Buttons

Test Description Target Tolerance
Diameter Measure the diameter of the threaded section using digital calipers. 21.8mm +/- 0.2mm
Length Measure the overall length using digital calipers. 40mm +/- 1mm
O-ring Inspect for the presence of an O-ring under the top flange. Present N/A
Water resistance Drill a hole in a small plastic tub. Fasten the button to the hole and fill the tub with water. The button should continue to operate when submerged, and prevent water from leaking. N/A
Material Ensure the material will not rust by holding a magnet to the part. Stainless steel (no magnetic attraction) Weak attraction to stainless steel is permissible.

LED Indicators

Test Description Target Tolerance
Diameter Measure the diameter of the threaded section using digital calipers. 11.8mm +/- 0.2mm
Length Measure the overall length using digital calipers. 24mm +/- 1mm
O-ring Inspect for the presence of an O-ring under the top flange. Present N/A
Water resistance Drill a hole in a small plastic tub. Fasten the LED indicator to the hole and fill the tub with water. The LED indicator should continue to operate when submerged, and prevent water from leaking. N/A
Material Ensure the material will not rust by holding a magnet to the part. Stainless steel (no magnetic attraction) Weak attraction to stainless steel is permissible.

Farmduino

Test Description Target Tolerance
Pins Inspect the pins for damage. No pins should be bent N/A
Fuse Ensure the blade fuse is inserted and of the correct amperage. 15 Amps N/A
USB Power Out Read the voltage coming from the POWER OUT USB connector. 5.1V +/- 0.1V
Color Inspect the color of the PCB. Matte black N/A
Functionality Use the factory test firmware to test motor, encoder, and periperhal functions. All functions work N/A

Raspberry Pi Power Cable

Test Description Target Tolerance
Cable Inspect the cable spec. Shielded 28AWG/1p+24AWG/2c

1p = 1 twisted pair (for data)
2c = 2 core (for power)
N/A
Connectors Connect the cable to a Raspberry Pi and Farmduino inside a fully assembled electronics box. The cable should connect to both circuit boards without interference from the box or other components. N/A
Length Measure the length using a measuring tape. 300mm +/- 10mm
Voltage drop Connect the cable to two USB voltage monitors. Then connect the cable and monitors    
Color Inspect the color of the cable. Black N/A

Farmduino Data Cable

Test Description Target Tolerance
Cable Inspect the cable spec. Shielded 28AWG/1p+24AWG/2c

1p = 1 twisted pair (for data)
2c = 2 core (for power)
N/A
Connectors Connect the cable to a Raspberry Pi and Farmduino inside a fully assembled electronics box. The cable should connect to both circuit boards without interference from the box or other components. N/A
Length Measure the length using a measuring tape. 150mm +/- 10mm
Color Inspect the color of the cable. Black N/A

Jumper Wires

Test Description Target Tolerance
Connectors Connect a jumper wire to two GPIO pins. It should connect as expected. N/A
Wire Inspect the wire spec. 20AWG N/A
Length Measure the length using a measuring tape. 180mm +/- 10mm
Color Inspect the color of the cable and shrinkwrap. Black N/A

NEMA 17 Stepper Motors with Rotary Encoders

Test Description Target Tolerance
Motor length Measure the length of the motor body (no encoder or shaft) using digital calipers. 47.3mm +/- 0.5mm
Shaft Mount a GT2 pulley onto the motor shaft according to the FarmBot system design. Pulley should mount as expected N/A
Shaft length Measure the length of the motor shaft using digital calipers. 22mm +/- 0.5mm
Mounting holes Mount a motor to a cross-slide plate according to the FarmBot system design. Screws should thread into motor as expected N/A
Motor operation Connect the motor to a Farmduino and issue a movement command. Motor should operate as expected N/A
Encoder Connect the motor and encoder to a Farmduino, issue a movement command, and inspect the encoder position in the web app. Encoder position values should update as expected N/A
Engraving Inspect the FarmBot logo engraving. Must not be stretched N/A

Motor Cables

Test Description Target Tolerance
Length Measure the length using a measuring tape. See BOM spec +/- 20mm
Connectors Use a motor cable to connect a motor to the Farmduino. Issue some movement commands. The motor should operate as expected N/A
Label Inspect the shrinkwrap label. X1, X2, Y, ZY, and ZZ N/A
Cable Inspect the cable’s spec. 18 guage, 4 core N/A
Color Inspect the color of the cable. Black N/A

Encoder Cables

Test Description Target Tolerance
Length Measure the length using a measuring tape. See BOM spec +/- 20mm
Connectors Use a motor and encoder cable to connect to the Farmduino. Issue some movement commands. The encoder should report motor position as expected N/A
Label Inspect the shrinkwrap label. X1, X2, Y, ZY, and ZZ N/A
Cable Inspect the cable’s spec. 18 guage, 4 core N/A
Color Inspect the color of the cable. Black N/A

Cable Carrier

Test Description Target Tolerance
Size Inspect the size marking embossed into the plastic. See BOM spec N/A
Length Measure the length of the cable carrier using a measuring tape. See BOM spec 0
End pieces Inspect the orientation of the end pieces. Oriented according to FarmBot system design N/A

Universal Tool Mount Cable

Test Description Target Tolerance
Length Measure the length using a measuring tape. See BOM spec +/- 20mm
Diameter Measure the diameter of the cable using digital calipers. 9.5mm +/- 0.5mm
Connectors Connect a UTM to the Farmduino. Mount and dismount a tool and use a tool verification sequence to verify cable function. The tool verification sequence should work as expected N/A
Cable Inspect the cable’s spec. 20 guage, 12 core N/A
Color Inspect the color of the cable. Black N/A

Soil Sensor PCB

Test Description Target Tolerance
Function Connect the PCB to a test fixture and take readings in dry and wet conditions. Functions as expected N/A
Wiring Inspect the wire colors. VCC - Red
GND - Black
SIG - Yellow
SDA - Green
SCL - White
N/A
Wiring length Measure the length of the wires using digital calipers. 50mm +/- 5mm
Terminals Attach a terminal to the soil sensor plastic part using an M3 screw. Terminal should attach as expected N/A
Color Inspect the color of the PCB. Matte black N/A

Solenoid Valve

Test Description Target Tolerance
Threads Screw an NPT to barb adapter onto the inlet. Connect a tube to the barb and pressurize the system with municipal water. Adapter should thread on as expected and the system should hold water without leaking. N/A
Voltage Connect the solenoid valve to a Farmduino and test operation. Opens and does not get hot with 24V input +/- 3V
Terminal size Connnect a solenoid valve cable. The cable’s connectors should connect to the terminals as expected N/A
Terminal direction Inspect the direction the terminals face. Terminals should face the inlet N/A

Vacuum Pump

Test Description Target Tolerance
Performance Connect the vacuum pump to a 24V power source, vacuum air tube, UTM, and seeder tool. The vacuum should exert enough suction to pick up a seed N/A
Terminal size Connnect a vacuum pump cable. The cable’s connectors should connect to the terminals as expected N/A
Size Assembly a vacuum pump, vacuum pump mount plate, vacuum pump cover, and z-axis extrusion according to the FarmBot system design. Vacuum pump should fit inside the housing without interference, N/A
Inlet size Connect a vacuum air tube to the vacuum pump’s inlet. Tube should connect as expected, requiring a small amount of force to remove. N/A

Vacuum Pump Cable

Test Description Target Tolerance
Connectors and continuity Use the cable to connect a vacuum pump to a Farmduino. The cable’s connectors should connect as expected and the vacuum pump should be operable. N/A
Length Measure the length of the two sections of cable using a tape measure. See BOM spec +/- 20mm
Cable Inspect the cable’s spec. 18 guage, 2 core N/A
Shrinkwrap Inspect the color of the shrinkwrap. Gray N/A
Color Inspect the color of the cable. Black outer, black and red inner N/A

Solenoid Valve Cable

Test Description Target Tolerance
Connectors and continuity Use the cable to connect a solenoid valve to a Farmduino. The cable’s connectors should connect as expected and the valve should be operable. N/A
Length Measure the length using a tape measure. 0.6m +/- 20mm
Cable Inspect the cable’s spec. 18 guage, 2 core N/A
Shrinkwrap Inspect the color of the shrinkwrap. Blue N/A
Color Inspect the color of the cable. Black outer, black and red inner N/A

Peripheral Leads

Test Description Target Tolerance
Connector and continuity Connect the lead to a Farmduino and power the peripheral. Use a voltmeter to measure the voltage at the exposed leads. The cable’s connectors should connect as expected and the voltage should be 24V. N/A
Length Measure the length using a tape measure. 10cm +/- 1cm
Cable Inspect the cable’s spec. 18 guage, 2 core N/A
Shrinkwrap Inspect the color of the shrinkwrap. Black N/A
Color Inspect the color of the cable. Black outer, black and red inner N/A

Camera

Test Description Target Tolerance
Resolution Take a photo and inspect the resolution. 1.3MP N/A
Focus Take a photo of an object 50cm away. The object should appear sharp N/A
Diameter Measure the diameter of the camera module using digital calipers. 11mm +/- 0.5mm
Mount compatibility Mount the camera to an extrusion using two camera mount halves. The camera should be able to be firmly mounted in place N/A
Function Connect the camera to a Raspberry Pi using a Genesis XL camera cable and take a photo from the FarmBot web app. Photo taking should work as expected (no black images, no failures) N/A
Camera module length Measure the length of the camera module using digital calipers. 38mm +/- 2mm
Cable Inspect the spec of the cable. Shielded 28AWG/1p+24AWG/2c

1p = 1 twisted pair (for data)
2c = 2 core (for power)
N/A
Cable length Measure the length of the cable using a tape measure. 1m +/- 2cm
Sealing Inspect the sealing where the cable enters the camera module housing. The cable should be well sealed N/A
Lens Inspect the camera lens for obstructions and straightness. The camera lens should be free of obstructions and point straight out of the camera module. N/A
Color Inspect the color of the cable. Black N/A

Camera Cable

Test Description Target Tolerance
Length Measure the length of the cable using a measuring tape. See BOM spec +/- 20mm
Color Inspect the color of the cable. Black N/A
Function Use the camera cable to connect a camera to a Raspberry Pi. Take a photo using the web app. Image should be captured as expected N/A
90 degree connector Connect the 90 degree connector to a camera and submerge into a cup of water. Take a photo using the web app. The connector should make a waterproof connection, allowing an image to be captured as expected N/A

Camera Calibration Card

Test Description Target Tolerance
Print size Measure the center-to-center distance between two white dots in the same row using a digital calipers or a measuring tape. 30mm +/- 0.5mm
Contrast Inspect the card for good contrast between the background and the white dots. Black and white (no gray) N/A
Paper thickness Measure the thickness of the paper using digital calipers. 0.43mm (16pt) +/- 0.1mm
Sheen Inspect the sheen of the card. Matte N/A

Jumper Links

Test Description Target Tolerance
Hole size Measure the size of the holes using digtial calipers. 3.25mm +/- 0.1mm
Fit Assemble a jumper link into a tool using M3 screws and locknuts according to the FarmBot system design. Part should fit without interference N/A
Thickness Measure the thickness using digital calipers. 1mm +/- 0.2mm
Material Ensure the material will not rust by holding a magnet to the part. Aluminum (no magnetic attraction) N/A
ELectrical conductivity Connect an ohm meter to both ends of a jumper link. Less than 1 ohm N/A

LED Strip

Test Description Target Tolerance
Connector Connect the LED strip to a Farmduino peripheral plug. Part should connect as expected N/A
Cable color Inspect the color of the cable. Black N/A
Cable length Measure the length of the cable using a measuring tape. 1m +/- 20mm
LED color Turn on an LED strip and inspect the color of the light. Cool white (6000K) N/A
LED strip length Measure the length of the LED strip using a measuring tape. See BOM spec +/- 30mm
LED strip cut end Inspect the cut end of the LED strip. Cut end should be sealed with silicon rubber N/A
Double-sided tape Inspect the LED strip for double-sided tape. The part should not have any tape or other adhesives along its length N/A

UTM PCB

Test Description Target Tolerance
Pins Inspect the pins for damage. No pins should be bent N/A
Fit Mount the PCB into a UTM. The PCB should fit as expected N/A
Color Inspect the color of the PCB. Matte black N/A

Power Cord Protector

Test Description Target Tolerance
Plug compatibility Connect a power supply to an extension cord, place the connection inside the power cord protector, and close the power cord protector fully. The plugs should fit inside as expected N/A
Color Inspect the color of the part. Green N/A