Checking Repeatability - Conair CSC User Manual

C
HECKING
R
EPEATABILITY
3-14
I
NSTALLATION
Before any Conair puller/cutters are shipped, they are tested
for cut time repeatability to be sure they are within perfor-
mance specifications. The repeatability test checks the perfor-
mance of the rotary knife cutter to return the home park posi-
tion after a complete cut. Acceptable repeatability times
allowed for each cutter model prior to shipping are:
Type of Cutter
AC Pneumatic Cutter
DC Pneumatic Cutter
Velocity Servo (E Drive)
Positional Servo (FX)
CSC Positional Servo
Note: 1-millisecond at 60 feet per minute is equal to .012 inches.
The repeatability mode is built into the Conair cutter controls
and allows you to perform similar tests, without any external
test equipment. It is recommended that you check repeatability
on a regular basis. Acceleration/deceleration delays of the
servo do not contribute to repeatability error; any error is
attributed solely to motor stability, couplings, assembly,
power, and proximity sensor alignment.
Use any blade speed and line speed. The line speed is only
seen while in the Encoder or Product modes. It is recommend-
ed that the tests be performed at cut intervals between 0.5 and
5-seconds. Do not change the blade speed or the line speed
after starting the test.
To test repeatability:
1
Turn on the cutter.
with the cutter on-line. The Display will read: DevCP
shows problems with the cutter. DevCC shows problems
with the puller.
2
Press the menu key to display operator func-
tions.
3
Press soft key test to display DevCP screen.
4 Press soft key on/off to start the test-
ing and display the results.
5
Press next key displays DevCC
results.
Note: Previous key returns to DevCP screen.
Repeat the test by pressing the Reset Cut button to begin a
new sample period.
To end the Repeatability test, press soft key on/off or exit.
CSC Combination Puller/Cutter
Repeatability Time
Less than 1 millisecond
Less than 1.5 millisecond
Less than 1 millisecond
Less than 0.1 millisecond
Less than 0.1 millisecond
Perform the test in encoder mode
UGE048/1103