Hyd-Mech S-23A, Руководство по эксплуатации и обслуживанию

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Pg 48
S22A / S23A mits 2001
CALIBRATION PROCEDURE
FOR MITSUBISHI PLC with 2100 series software
Length calibration may be achived in two ways: by inputting “ACTUAL LTH” (actual length) or “LTH CONST”
(length constant) parameter.
A) To determine “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 (i.e.S20A=29.00")
and close the front VISE. Simultaneously depress "FWD" & "REV" buttons on the PLC to access parameters. A
password is required at this point which can be obtained from Hyd.Mech Service Department.
SCREEN WILL DISPLAY:
With the cursor @ shown position (as illustrated above) press . The cycle start button will then start to flash
& "ENTER" will change to "ON" indication 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 cut part length.
Move cursor down to “ACTUAL LTH” and enter length of 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 while the shuttle is
retracting and in calibration mode. If the actual length value shows as a negative number, then the channels must
be reversed and the calibration procedure repeated.
B) To determine “LTH CONST” value, use this formula;
LTH CONST = ENCODER PINION CIRCUMFERENCE (TTd)
I
ENCODER RESOLUTION
Example;
For a 1” piniondiameter and 2500 PPR encoder:
LTH CONST = TTd
I
2500 PPR = 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) orwith 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
decreased.
- If part length error gets shorter as the programmed length increases; ACTUAL LTH value should be
increased.
- Make small adjustments at a time (i.e. .020" - .030") and recheck with test cuts.
General rule: If part length error gets longer as programmed length increases:
Existing ACTUAL LTH=33.070"
Change ACTUAL LTH to 33.070 - .020 = 33.050"
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