MAINTENANCE |
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WIRE DRIVE MOTOR
Periodically inspect the wire drive motor brushes, Figure D.4. Replace the brushes as needed.
CHANGING WIRE FEED GEAR RATIOS
Four wire size conversion kits are available to modify the wire feeder for different size or type electrodes. The kits include drive rolls and guide tubes for the wire specified, as shown in Table D.1.
TABLE D.1 - CONVERSION KITS
Wire Type in. (mm) | Conversion Kit |
|
|
Solid or Cored |
|
Solid or Cored |
|
Solid |
|
Cored |
|
Refer to Table D.2. Four gear ratios are available: 21:1, 57:1, 95:1, and 142:1. To change the gear ratio, replace the motor pinion and the first reduction gear per the following instructions (Refer to Figures D.4, D.5 and D.6).
NOTE: Any item numbers in parentheses on Figure D.5 refer to item numbers in the task description breakdown.
FIGURE D.5 – CHANGING THE WIRE
FEED GEAR RATIO
| HEX NUT (11) |
|
PLAIN WASHER (9) |
| |
| SLOT HEAD | INPUT |
| SCREWS | HELICAL |
WIRE | (MOUNTING | GEAR (12) |
FEED | SCREWS) |
|
GEARBOX
WOODRUFF
KEY (8)
1.Remove the four screws that mount the adapter plate and motor assembly to the gear box. Remove the adapter plate and motor assembly from the gear box.
2.Take the two long screws removed in step 1 and screw one into each of the tapped holes located on the face of fiber input helical gear (12). Insert the screws through the full thickness of the gear, and using a screwdriver wedged between the screws to prevent rotation, remove hex nut (11) that holds the gear to the shaft. Remove plain washer (9).
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TABLE D.2 – WIRE FEED GEAR RATIOS.
Gear | Feed Speed |
| Max Wire Size |
| |||
Range |
|
| in. (mm) |
| |||
Ratio | in/min (m/min) |
|
|
| |||
Cored Wire |
| Solid Wire | |||||
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|
| |
21:1 | 0.052 | (1.3) |
| 0.052 | (1.3) | ||
57:1 | 3/32 (3.0) |
| 1/16 (1.6) | ||||
95:1 | 5/32 (4.0) |
| 1/8 (3.2) | ||||
142:1 | 5/32 (4.0) |
| 7/32 (5.6) | ||||
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