Nitto Kohki DCC010X-AX, Инструкция по эксплуатации

Страница: 34 / 65

32
EN
Screw fastening time lower limit value (No.15 CRT-T-L) / Screw
fastening time upper limit value (No.16 CRT-T-U)
Sets the screw fastening time (collect timer) lower limit value (Lower) and upper limit value (Upper).
After setting the setting items No.3 FSTN-TYPE to No.7 FSTN-T, set the screw fastening time lower limit value and
upper limit value.
Setting Details
Screw fastening time
lower limit value
(No.15 CRT-T-L)
z z
When the actual screw fastening time is shorter than the setting time, count is not performed
(detection of short screw, refastening, screw galling, etc.)
z z
Setting at 0.00 to 9.99 seconds (0.00: lower limit value function invalid)
z z
Set a value smaller than “CRT-T-U”
Screw fastening time
upper limit value
(No.16 CRT-T-U)
z z
When the actual screw fastening time is longer than the setting time, count is not performed
(detection of mistakenly long screw tightening, etc.)
z z
Setting at 0.01 to 9.99 seconds/DIS (DIS: upper limit function invalid)
z z
Set a value larger than “CRT-T-L”
CAUTION
z z
To fix the screw fastening time, use the same operations method to perform the screw tightening.
Measurement of screw fastening time
If you perform screw tightening during the No.15 CRT-T-L/No.16 CRT-T-U settings, you can measure the actual
minimum value or maximum value of the screw fastening time.
Since the screw length and electric screwdriver speed vary, you can update the measurement value any number of
times to set the optimum value.
Perform measurement for the time from when the electric screwdriver starts rotating until torque-up. Measurement is
not performed when stoppage occurs partway through, or for reverse rotation.
When measurement is performed normally, the controller LCD 2nd line is displayed as shown below.
Each time screw tightening is performed, the CRT-T-L (lower limit value) setting is updated to the minimum value, and
the CRT-T-U (upper limit value) setting to the maximum value.
Reference the measured minimum value or maximum value, to set the screw fastening time.
Note that rotating the [SETTING] dial clears the memory of the set minimum value and maximum value.
CAUTION
z z
Periodically measure the screw fastening time.
z z
The electric screwdriver speed includes a solid differential. In addition, it changes due to the effects of heating
or mechanical loss, etc.
z z
As shown below, perform setting with consideration for scattering in screw length or screw fastening
operations.
Screw fastening time lower limit value: -10% from measurement minimum value (Example: set to measurement
minimum value 0.6s
"
0.54s)
Screw fastening time upper limit value: +10% from measurement maximum value (Example: set to measurement
maximum value 0.7s
"
0.77s)
(-10%, +10% is one example. Take into consideration the screw length tolerance, workpiece individual
differential, and operations scatter, etc.)
Setting Mode Details
TV07783-1_DLV10C_en.indb 32 2017/06/27 17:41:39