Hyd-Mech H-18 ASV, Руководство пользователя

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3.12 3.13
The display should ready 3.142” (positive or negative depending on the direction you rotated).
Repeat this test 3 or 4 times, spinning the shaft several times between tests.
CONSISTENT INACCURACY (make sure the blade kerf value is correct)
Change the “ACTUAL POS” parameter to 1. This will make the PLC show actual shuttle travel in AUTO
With no material in the machine:
1. Program JOB 1 for 2 pieces of 5” in length. JOB 2 for 2 pieces of 10” in length and JOB 3 for 2 pieces
of one complete shuttle stroke length.
2. Enter JOB’s 1 to 3 into the QUEUE.
3. Record measurements on the display each time the shuttle vise reaches the target length and closes. It
should equal the required length plus the programmed kerf. Check that this measurement is ± .002” for
each length. If the overshoot / undershoot is very inconsistent, it could be related to an incorrect shuttle
cushion period. This many be caused be “DECEL DIST” parameter being set to low, defective fast or
reverse output relays on the PLC, or the hydraulic cushion vale (located at the hydraulic manifold) may
be faulty.
LINEAR INACCURACY (not valid for machines with linear encoder)
Load machine with a piece of stock for test cutting
Open the parameters screen
Initiate the length calibration procedure
Re-enter the new “ACT LTH” (actual length) value
Re-cut test lengths and check if accuracy is satisfactory
Note:
Linear inaccuracy may be corrected in two ways, by using the length calibration as described or by adjusting
the LTH CONST as follows:
Load the machine with a piece of stock for test cutting
Program the PLC to cut two pieces of 1”, 12” and a length equal to a shuttle and a half of the machine being
checked.
Make the cuts and measure as accurately as possible.
Using the formula provided, calculate the new parameter “LTH CONST”
Formula for determining new parameter “LTH CONST”
Measured length ÷ programmed length x existing constant = new “LTH CONST”
i.e. Programmed length =1.00” Measured Length =.99” -.001”
=12.00” =11.988” -.012”
=60.00” =59.940” -.060”
Existing parameter for LTH CONST = 0.001256
11.988 ÷ 12.00 x .0012566 = 0.001255
The new parameter LTH CONST value would then be 0.001255. This value should be entered and the test
repeated. Adjust the parameter as necessary.
GENERAL RULE:
Lowering the parameter value = longer shuttle travel = longer parts
Increasing the value = shorter shuttle travel = shorter parts
Problem 3 (for P Models, disregard all references to a shuttle)