F-61
TROUBLESHOOTING & REPAIR
F-61
TEST PROCEDURE
Perform the following checks with the
NA-5 connected to a Lincoln CV weld-
ing power source according to the prop-
er connection diagram. See the
Installation Section
of this manual.
1. Check to make sure the speedmeter
calibration jumper is connected to
the proper calibration pin for the
head and drive roll system being
used. See Table F.3
WIRE SPEED ACCURACY TEST (Continued)
NA-5
SPEEDMETER HEAD DRIVE ROLL WIRE SIZE RANGE RATED SPEED
CALIBRATION RATIO PART NUMBER RANGE (IPM)
21* 21/1 S12778 Single .035 - .052 Solid 100 - 2070
S19113 Single .045 - .052 Cored
57F** 57/1 S12778 Single .035 - .052 40 - 778
57** 57/1 S12515 Single 1/16 - 3/32 38 - 762
95 95/1 S12514 Single 3/32 - 5/32 22 - 428
95S*** 95/1 S12515 Single 1/16 - 3/32 23 - 456
S19113 Single .045 - .052 Cored
S13161-052 Twin .045 -.052
S13161-5/64 Twin 1/16 - 5/64
S14904 (Outer) Twin 3/32
S14905 (Inner)
142 142/1 S12514 Single 3/32 - 7/32 15 - 289
142T*** 142/1 S14904 (Outer) Twin 5/64 - 1/8 15 - 300
S14905 (Inner)
TABLE F.3
* Present on HI -Speed NA-5 speedmeter board only. ** Early speedmeter pins were labeled 55F and 55,
respectively.
*** Early speedmeter PC boards did not include these calibration pins.
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