3.20
Input/Output Terminal Information
Calibration Procedure
Length calibration may be achieved in two ways: By inputting the ACTUAL LTH or the LTH CONST parameter.
To determine the ACTUAL LTH value, the LTH CLB (length calibration) procedure must be executed.
In manual mode, position a piece of material, which is longer than the shuttle full stroke length and close the front vise.
Simultaneously press the “FWD” and “REV” buttons on the PLC to access the parameters. A password is required at this
point, which can be obtained from the Hyd·Mech Service Dept. The screen will then display as follows:
With the cursor at the shown position press the enter button. The cycle start button will start to flash and the “Enter” will
change to “On” indicating self calibration mode. Start the blade and the trim cut will be made. After the trim cut is made
the head will rise, the shuttle will retract fully in slow speed, clamp the material and come fully forward in slow speed to the
home position and make a cut. After the cut is complete “On” will change back to “Press Enter”. Measure the length of the
cut part.
Move the cursor down to the “ACTUAL LTH” and enter the length of the cut part plus the actual kerf value. Then exit the
parameters by pressing the AUTO/MAN key (the cycle start button will stop flashing). To determine if the encoder
channels are connected correctly, observe the actual length parameter for the sign only during shuttle retraction in
calibration mode. If the actual length value shows as a negative number, then the channels must be reversed and the
calibration procedure repeated.
To determine “LTH CONST” value, use this formula;
LTH CONST = ENCODER PINION CIRCUMFERENCE ÷ ENCODER RESOLUTION
Example:
For a 1” pinion diameter and 2500 PPR encoder:
LTH CONST = π(1”) ÷ 2500PPR = 0.001257
NOTE:
When first entering the parameters screen if not running the self-calibration do not use the enter key but use the cursor
keys to scroll through the parameters.
To check length control consistency:
1. Perform test cuts of three different lengths (i.e. 1”, 12”, 20”) and measure as accurately as possible with a Vernier or
dial caliper.
2. If the measurements indicate a linear problem (measured length error increases as the programmed length
increases), the “ACTUAL LGTH” or “LTH CONST” value will have to be adjusted.
To adjust “ACTUAL LGTH” value The Length Calibration Procedure MUST be performed. This may be done with material
in the machine (cut and measure material length) or with no material in the machine (let machine complete the calibration
cycle, then enter new value).
If part length error gets longer as the programmed length increases; ACTUAL LTH value should be increased.
If part length error gets shorter as the programmed length increases; ACTUAL LTH value should be decreased
Summary of Contents for H18 A
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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 ...
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Page 16: ...1 2 LIFTING INSTRUCTIONS ...
Page 59: ...4 1 ELECTRICAL SCHEMATICS SEE PDF ON ATTACHED CD SECTION 4 ELECTRICAL ...
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Page 65: ...7 1 SECTION 7 OPTIONS OPTIONAL ASSEMBLY DRAWINGS SEE PDF ON ATTACHED CD ...
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Page 69: ...8 3 H18SV H22SV LIFTING INSTRUCTIONS ...
Page 70: ...8 4 H18SV LAYOUT ...
Page 71: ...8 5 H22SV LAYOUT ...
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