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8M DC Autodoor - Troubleshooting Guide - NGC

Service Home 8M DC Autodoor - Troubleshooting Guide - NGC

8M DC Autodoor - Troubleshooting Guide - NGC

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Recently Updated Last updated: 12/03/2021

8M DC Autodoor - Troubleshooting Guide - NGC


Introduction

The DC Auto Door uses a pneumatic cylinder to push the drive wheel onto the door.

A 12 volt motor drives the wheel CW and CCW to open or close the door.

The machine uses a timer to open the door(s) (P1404/ P2229,P2230) and the door closed sensor to stop the motor when closing the door(s).

An internal spring in the cylinder raises the assembly up when the solenoid shuts off.

Symptom Table

Symptom Possible Cause Corrective Action
Alarm 548 DOOR M CODES NOT ALLOWED The machine does not have a cell safe signal or the light curtain is not enabled. The Mill M80/M81 and Lathe M85/M86 M-codes work only while the machine receives a cell-safe signal from a robot or if it has a light curtain installed. For more information refer to Robot Integration Aid - NGC reference document.
Auto Door not engaging, wheel is turning. There is a problem with the solenoid or contamination in the cylinder. Troubleshoot the solenoid, inspect the air hose and cylinder.
Auto Door engages but wheels do not turn. The Door or the DC motors are jammed. If the DC motors are jammed it will cause the 12VDC power supply to shut down.  Verify that the Door or  DC motors are not jammed.
There is a problem with the auto door 12VDC power supply. Check the AD power supply, 120 VAC input, 12 VDC output.  The power output can drop if the power supply senses a large load,  this is normal.  Check for door jams or binding in the motors.
There is a problem with the 8M PCB. Inspect the relays and connections.
The IO.xml configuration file is not mapped correctly. This can happen if the auto door was field installed, or after a software update.  The IO.xml file may not have the output mapped correctly, call Haas Service.
The door does not fully open. Chip build up in the door rollers or coolant contamination on the auto door wheel. Clean the chips away from the door rollers. Clean the coolant from the auto door wheel.
Setting 131 Auto Door is On. 
When pressing the Auto Door button on the side of the pendant,
or
when commanding a M80 on MDI.
A message "Feature Disabled" appears on the screen or alarm 548 DOOR M CODES NOT ALLOWED.
The parameter 823 [823:] Auto Door Type is set to 0. Make sure parameter 823 [823:] Auto Door Type is set correctly:

5 = Single DC Motor Auto Door
6= Dual DC Motor Auto Door

Input Voltage Inspection

Corrective Action:

Measure the voltage on the AD power supply [1]. Verify the 120 VAC input and 12 VDC output.

Measure the voltage at P2 on the 8M PCB [2]. Use a multimeter with needle-tip probes. The voltage must be 12 VDC.

 Note: Do not measure the voltage with the cable disconnected.

If the voltage is not correct, measure the voltage at P35 for CHC or P18 for NGC on the PDIST PCB. The voltage must be 12 VDC. If the voltage is correct, cable 860 is at fault. If the voltage is not correct, troubleshoot the PDIST PCB.

If the voltages are correct and 12 VDC is going to the motor but it does not rotate, the motor may have failed. The motor should read 6-12 Ohms of resistance.

Relay Inspection

Corrective Action:

Refer to 8M PCB - Troubleshooting Guide

Solenoid

After an auto door is field installed, or after a software update. The IO.xml file may not have the output mapped correctly, call Haas Service.

 

Auto Door Settings / Parameters

Note: The following parameters ae not to be changed and should only be used as reference

Setting Description Usage
131 AUTODOOR This setting enables/disables the auto door

Factory Setting Parameters

Parameter Description Usage
1404 AUTO DOOR OPEN HOLD TIME (MS) (Single Door) This specifies the time that the DC motor is on to open the door.
2229 DC MOTOR LEFT DOOR OPEN TIME (Double Door) Specifies time for high speed motion of left door.
2230 DC MOTOR RIGHT DOOR OPEN TIME (Double Door) Specifies time for high speed motion of right door.
2194 Enble Front Door Fully Open Switch (Single Door) Enables checking of front door fully open switch at end of door sequence, behavior is unaffected otherwise
2195 Enable Right Door Fully Open Switch (Double Door) Enables checking of right door fully open switch at end of door sequence, behavior is unaffected otherwise
2196 Enable Left Door Full Open Switch (Double Door) Enables checking of left door fully open switch at end of door sequence, behavior is unaffected otherwise

Configuration Paramters

Parameter Description Usage
251 AUTO DOOR OPEN ERROR TIME This specifies the time allowed for the motor to run to open the door. After this an alarm is generated.
823 AUTO DOOR TYPE The auto door type (type 5 = single DC motor autodoor, type 6 = dual DC motor auto door)
1405 AUTO DOOR CLOSE HOLD TIME (MS) This specifies the time that the DC motor remains on after the door closed switch is sensed.
2091 WHEELS CONTACT DELAY Used to ensure motors are fully engaged with the track before driving the motors.
2092 WHEELS RELEASE DELAY Used to ensure motors have fully stopped before disengaging motors from track.

Classic Haas Control Parameters

Note: These parameters are only available on a Classic Haas Control with Lathe software version 11.26 or higher.

Parameter Description Usage
1406 AUTO DOOR OPEN OUTPUT The auto door open M-code relay output number.
1407 AUTO DOOR CLOSE OUTPUT The auto door close M-code relay output number.
1408 AUTO DOOR ENABLE OUTPUT The auto door engage solenoid output number.
1409 AUTO DOOR OPEN INPUT This parameter is not used. There is no door open switch, the control looks at parameter 1404 time to open the door.

Autodoor Sequences

Open Sequence with Door Fully Open Switch

  1. Turn on the relay to engage friction wheel.
  2. Wait for timer P2091.
  3. Turn off the door motor close relay; turn on door motor open relay.
  4. Wait for door open, (P1404/ P2229, P2230).
  5. Turn off door motor open relay.
  6. Wait for timer P2092.
  7. Turn off friction wheel engage relay.

Open Sequence without Door Fully Open Switch

  1. Turn on the relay to engage friction wheel.
  2. Wait for timer P2091.
  3. Turn off the door motor close relay; turn on door motor open relay.
  4. Wait for Door Fully Opened switch signal (P2194/ P2195, P2196).
  5. If Door Fully Opened switch is not detected before opening time  expires (P1404 / P2229,2230), alarm (when open automatically)
  6. Turn off door motor open relay.
  7. Wait for timer P2092.
  8. Turn off friction wheel engage relay.

Close Sequence

  1. Turn on friction wheel engage relay.
  2. Wait for timer P2091.
  3. Turn off door motor open relay; turn on door motor close relay.
  4. Wait for door closed switch signal.
  5. If door switch is not detected before P251 expires, alarm (when closed automatically)
  6. Wait for timer P1405.
  7. Turn off door motor close relay.
  8. Allow program execution to resume, if applicable.
  9. Wait for timer P2092.
  10. Turn off friction wheel engage relay.

Electrical Diagrams

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