HEIDENHAIN TNC 155 W - Page 79

Mains power ON
Fault display:
POWER INTERRUPTED
cancel with CE .
0
Emergency Stop routine
1
I
Traverse over reference marks
Reset position displays X, Y, Z, IV to “0”
Vary offset adjustment on servo-amplifiers until position displays
are as close to “0” as possible or oscillate symmetrically about “0”
1
Automatic offset adjustment via the control
An automiatic offset-adjustment is possible by entering the code number 75368.
The control displays the offset values in the dialogue line in the sequence X, Y, Z, IV in 2.4 mV-units e.g.
0 1
0 2
The display signifies: no offset in the X-axis, 2.4 mV in Y, no offset in Z, and 4.88 mV in axis IV.
The automatic offset adjustment is selected by pressing
iol
ENT .
The display offset value is entered into the
control which then automatically provides the appropriate compensating voltage at the output.
If the automatic offset adjustment is to be switched off, enter code number 75368 and press
No
/1
EM
This adjustment however, does not substitute the offset adjustment of the drives as described above.
Automatic cyclic offset adjustment
Via machine parameter 252 a duration can be programmed for repetition of the atuomatic offset adjustment.
Function
Parameter
No.
Entry
Cycle duration for
automatic 252
0 2 no automatic adjustment
offset adjustment
1 65 535 multiplicator for . . .
20 ms
The automatic offset adjustment is carried out if the specified time du(ration has elapsed and the following
conditions are fulfilled:
.al I axes are at standstil I
.the spindle is not switched on and
.the axes are not clamped.
Moreover, immediately after approaching the reference marks, an offset adjustment is carried out.
With controlled movement, an adjustment is also possible in the duration between “nominal value at target”
and “actual value not within target window”, providing the nominal value is longer than 5 s at the target.
With every offset adjustment, 2.44 mV are compensated. If the offset voltage is greater than 2.44 mV, full
adjustmen,t is achieved after several adjustment cycles.
The max. permissible offset-voltage is 100 mV. If this voltage is reached or exceedled, the following error
message is, displayed:
“GROSS IPOSITIONING ERROR E”
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