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Reason: Control signals aren't reaching the electronic driver modules/servo motors.

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title	1100MX, 770MX CLICK TO EXPAND

Power off the machine.
Examine the data cables at the machine control board and the servos removing then re-connecting them to ensure they are seated.
1. Machine control board: Degson style
  1. 424 (J13) (X-axis)
  2. 425 (J14) (Y-axis)
  3. 426 (J15) (Z-axis)
2. Servos: Molex style
Examine the power cables at the DC-BUS and the servos removing then re-connecting them to ensure they are seated.
1. DC-Bus: Spade connector
  1. 210/211 (X-axis)
  2. 220/221 (Y-axis)
  3. 230/231 (Z-axis)
2. Servos: Molex style
Continue to the next troubleshooting topic.

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title	1100M, 770M, 8L, PCNC 1100, PCNC 770 CLICK TO EXPAND

Power off the machine.
Examine the data cable at the machine control board and the axes drivers.
1. Machine control board: 26 pin IDC (ribbon cable); J6
2. Stepper driver controllers: 10 pin IDC (ribbon cable)
  1. 423.1 (X-axis)
  2. 423.2 (Y-axis)
  3. 423.3 (Z-axis)
Examine the power and control cables at the DC-BUS and the stepper driver controllers removing, inspecting, and re-connecting them to ensure they are seated.
1. DC-Bus: Spade connectors
  1. 210/211 (X-axis)
  2. 220/221 (Y-axis)
  3. 230/231 (Z-axis)
2. Stepper driver controllers: Degson style
  1. 211-214 (X-axis)
  2. 221-224 (Y-axis)
  3. 231-234 (Z-axis)
If there is any discoloration, replace the cable and driver.
Continue to the next troubleshooting topic.

Info
PCNC 1100/770 only: Check connection of J2-5 and J2-6 jumper.

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title	15L CLICK TO EXPAND

Power off the machine.
Examine the data cable at the machine control board and the axes drivers.
1. Machine control board: 16 pin IDC (ribbon cable); J6
2. Stepper driver controllers: 10 pin IDC (ribbon cable)
Examine the power and control cables at the DC-Bus and the stepper driver controllers removing, inspecting, and re-connecting them to ensure they are seated.
1. DC-Bus: Spade connectors
  1. 302/303 (X-axis)
  2. 304/305 (Z-axis)
2. Stepper driver controllers: Degson style
  1. 302, 303, 308, 309, and 310 (X-axis)
  2. 304, 305, 311, 312, and 313 (Z-axis)
If there is any discoloration, replace the cable and driver.
Continue to the next troubleshooting topic.

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title	24R CLICK TO EXPAND

Power off the machine.
Examine the data cable at the machine control board and the axes drivers.
1. Machine control board: 26 pin IDC (ribbon cable); J6
2. Stepper driver controllers: 10 pin IDC (ribbon cable)
Examine the power and control cables at the DC-Bus and the stepper driver controllers removing, inspecting, and re-connecting them to ensure they are seated.
1. DC-Bus: Spade connectors
  1. 203/204 (X-axis)
  2. 207/208 (Y-axis)
  3. 209/210 (Z-axis)
2. Stepper driver controllers: Degson style
  1. 203, 204, 213, 214, and 215 (X-axis)
  2. 207, 208, 216, 217, and 218 (Y-axis)
  3. 209, 210, 219, 220, and 221 (Z-axis)
Continue to the next troubleshooting topic.

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title	1100MX, 770MX, 1100M, 770M CLICK TO EXPAND

Power off the machine. Then, unplug the green power connectors on all of the axis drivers (X, Y, Z, and A).
With the electrical cabinet door open, power on the machine.
Examine the green LED on the DC-BUS board, and then twist out the Emergency Stop button and press the Reset button. The green LED should come on.
Push in the Emergency Stop button.
1. If the LED goes out in two seconds or less, the capacitor is defective and must be replaced. If the LED takes five seconds or more to go out, the capacitor is OK.
If the results are not conclusive, power off the machine. Then, unplug the green power connectors from the axis drivers (if they're not already unplugged).
Power on the machine). Then, carefully measure DC voltage on wires 202 (common) and 203 on the DC-BUS board.
1. If there's a DC voltage of a nominal 65 Vdc (55-75), this indicates the capacitor is OK.
2. If there's a DC voltage of a nominal 40 Vdc (35-45), this indicates the capacitor is defective.

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title	PCNC 770, PCNC 1100, 15L CLICK TO EXPAND

Power off the machine. Then, unplug the green power connectors on all of the axis drivers (X, Y, Z, and A).
With the electrical cabinet door open, power on the machine.
Examine the green LED on the DC-BUS board, and then twist out the Emergency Stop button and press the Reset button. The green LED should come on.
Push in the Emergency Stop button.
1. If the LED goes out in two seconds or less, the capacitor is defective and must be replaced. If the LED takes five seconds or more to go out, the capacitor is OK.
If the results are not conclusive, power off the machine. Then, unplug the green power connectors from the axis drivers (if they're not already unplugged).
Power on the machine. Then, carefully measure DC voltage on wires 300 (common) and 301 on the DC-BUS board.
1. If there's a DC voltage of a nominal 65 Vdc (55-75), this indicates the capacitor is OK.
2. If there's a DC voltage of a nominal 40 Vdc (35-45), this indicates the capacitor is defective.

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title	24R CLICK TO EXPAND

Power off the machine. Then, unplug the green power connectors on all of the axis drivers (X, Y, Z, and A).
With the electrical cabinet door open, power on the machine.
Examine the green LED on the DC-BUS board, and then twist out the Emergency Stop button and press the Reset button. The green LED should come on.
Push in the Emergency Stop button.
1. If the LED goes out in two seconds or less, the capacitor is defective and must be replaced. If the LED takes five seconds or more to go out, the capacitor is OK.
If the results are not conclusive, power off the machine. Then, unplug the green power connectors from the axis drivers (if they're not already unplugged).
Power on the machine). Then, carefully measure DC voltage on wires 212 (common) and 211 on the DC-BUS board.
1. If there's a DC voltage of a nominal 65 Vdc (55-75), this indicates the capacitor is OK.
2. If there's a DC voltage of a nominal 40 Vdc (35-45), this indicates the capacitor is defective.

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Reason: The motor coupling needs grease.

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title	24R CLICK TO EXPAND

Power off the machine.
Remove the motor from the noisy axis and set it aside temporarily.
Remove the red bushing from the coupler and apply a small amount of silicone based synthetic grease to each side of the bushing.
Reassemble the coupling and remount the motor to the machine frame.

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Reason: The axis brake is failing.

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title	All Machines Except the 8L and PCNC 440 CLICK TO EXPAND

Ensure the machine is referenced. Put the brake into the maintenance position to manually disengage the brake. Check if the noise continues, if so proceed to the machine specific sections.

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title	1100MX, 770MX, 1100M, 770M CLICK TO EXPAND

With a multimeter, check for 24Vdc between wires 435 and 400 on the ECM board.
If 24 Vdc is not present, the relay on the ECM board has failed and the ECM board needs to be replaced. If 24 Vdc is present, the brake has failed and needs to be replaced.

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title	PCNC 1100, PCNC 770 CLICK TO EXPAND

With a multimeter, check for 65 Vdc between wires 326 and 327 that connect to the DC bus board.
If 65 Vdc is not present between 326 and 327, check for continuity between J1-7 and J1-8 on the machine control board. If there is not continuity between J1-7 and J1-8, the relay on the machine control board has failed and the control board needs to be replaced.
If 65 Vdc is not present, check wires 328 and 329 on the C1 contactor. If 65 Vdc is not present on 328 and 329, replace the C1 contactor. If 65 Vdc is present on 326 and 327, replace the Z-axis motor.

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title	15L CLICK TO EXPAND

With a multimeter, check for 65 Vdc between wires 326 and 327 that connect to the DC bus board.
If 65 Vdc is not present, check wires 328 and 329 on the C1 contactor. If 65 Vdc is not present on 328 and 329, replace the C1 contactor. If 65 Vdc is present on 326 and 327, replace the X-axis motor.

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title	PCNC 440, 8L CLICK TO EXPAND

The PCNC 440 and 8L are not equipped with a brake

Versions Compared

Old Version 5

New Version Current

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