28
P1891E/EN 09/07
91c_LCD en bedingt.fm, 24.09.2007
LCD display
6
6.3.5
Diagnostics submenu
TQ calibration
This test function cyclically recalibrates the system with the values used immedi-
ately before the start of a rundown. For this, the tool must not be tensioned!
First line: Calibration test and status.
Second line: TQ calibration voltage.
Third line: Offset voltage. If a value lies outside the tolerance range, the corre-
sponding error is displayed.
TQ measurement
In this test function, after the start button is pressed, the same calibration is
carried out as immediately before the start of a rundown. For this, the tool must
not be tensioned!
Then, the tool starts with speed "0". The torque is continuously measured and
displayed until the start button is released.
Second line: Current torque.
Third line: Peak value, highest value since the start button was pressed.
Angle encoder
The start button starts the tool at 30% of the maximum speed. After one revolu-
tion of the output shaft (nominal angle 360°), measured with the resolver, the tool
is stopped. During a fixed dwell time of 200 ms, any further angle pulses occur-
ring are traced. The total result is shown as Actual Angle. If the test run is not ter-
minated by a monitoring criterion and the batch result is greater than or equal to
360 degrees, it is evaluated and displayed as OK. Monitoring criteria are the
torque and a monitoring time.
If the torque exceeds 15 % of the calibration value (even during the dwell time),
or if the monitoring time of 4 seconds expires, the test run is terminated with a
TQ>
or
TMAX
result. However, you specifically need to check whether the output
shaft has actually turned by the value indicated (e. g. by placing a mark on the
spindle). If the angle reached by the output shaft does not agree with the value
displayed, either the angle factor has been entered incorrectly or the resolver is
defective.
Voltages
Second line: Current battery voltage. To ensure high utilization potential, this
voltage is monitored continuously during fastening operation. If the voltage drops
below limit, a warning output on the tool.
Third line: Programmed value. This can be changed using the TMEB-200 /
TMEB-COM / TMEC under
Tool
.
Cal OK
K 1.11
O 0.00
Value
Rated
value
Tolerance
Calibration offset
0 V
± 45 mV
TQ calibration voltage:
1.122 V
± 32 mV
Torque
T 5.57
T 8.23
Angle
A 360
OK
Voltage
V26.00
L18.00
