3.14
Problem # 2 (for automatic models with a shuttle)
Inaccurate Lengths in Auto Mode
Possible Causes:
1. Encoder
a. Pinion not engaging the rack all the way from front to back.
b. Mechanical interference.
c. Pinion loose on the encoder shaft.
2. Encoder Cable
a. Bad connection at encoder or at the PLC.
b. Intermittent open in one or more signal wires.
3. Improper programmed information
a. Existing parameter(s) incorrect.
b. Incorrect blade kerf.
4. PLC
a. Faulty PLC unit (not repairable in the field)
GENERAL RULES
Normally, three types of length inaccuracies may occur.
1. Inconsistent
a. Lengths cut are not consistent, error changes. It doesn’t matter how long the part required is the error is never
the same.
b. Cause: Most likely a defective electrical, hydraulic or mechanical component.
2. Consistent
a. Lengths cut are consistent and the error is also consistent. The error always stays the same regardless of part
length.
b. Cause: Kerf Value
3. Linear
a. Lengths cut are consistent but the error increases as the part length increases. The longer the part the greater
the error.
b. Cause: When the self-calibration is executed, an incorrect “ACT LTH” value was entered.
Diagnosis:
• Check and record the existing parameters. Also check for proper blade kerf. By making a cut part way into a piece
of material and measuring the width of the cut, the operator can check the blade kerf.
INCONSISTENT INACCURACY
• With the machine in Manual mode, move the shuttle all the way forward and clear (zero) the length display. Move
the shuttle in reverse, in slow speed, all the way to the end of its travel. Return the shuttle forward to the home position,
also in slow speed. The display should read 0.000” ± 0.005”. Do this test several times to be sure the read-out is repeat-
able.
Diagnosis:
Following the same procedure, run the shuttle alternating between fast and slow speed going back and forth. Again the
display should be able to read 0.000” ± .005” when returning to the home position.
Summary of Contents for H18 A
Page 2: ......
Page 12: ...0 8 Item 391938 Chip Augar Item 391335 Item 391340 ...
Page 13: ...0 9 Item 391397 Item 392801 Fixed Vise Shuttle Vise Item 392801 ...
Page 14: ......
Page 16: ...1 2 LIFTING INSTRUCTIONS ...
Page 59: ...4 1 ELECTRICAL SCHEMATICS SEE PDF ON ATTACHED CD SECTION 4 ELECTRICAL ...
Page 60: ...4 2 ...
Page 64: ...6 2 ...
Page 65: ...7 1 SECTION 7 OPTIONS OPTIONAL ASSEMBLY DRAWINGS SEE PDF ON ATTACHED CD ...
Page 66: ...7 2 ...
Page 69: ...8 3 H18SV H22SV LIFTING INSTRUCTIONS ...
Page 70: ...8 4 H18SV LAYOUT ...
Page 71: ...8 5 H22SV LAYOUT ...
Page 72: ...8 6 ...
Page 74: ...9 2 ...