HEIDENHAIN TNC 122 Technical Manual - Manual (Page 38)

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TNC 122 11 Machine Parameters 37
Installing the TNC 122
•
Insert sponge rubber gasket, slide unit into position, tighten screws.
Insert encoder connectors, wire connector X41 according to the documented layout of the
TNC 121 (see connector layout X41).
Connect power supply.
•
Differences compared to TNC 121:
Connect signal ground to the central ground point of the machine.
Include control-is-ready output (X41/10) and control-is-ready input (X41/28) in the emergency
stop circuit (see Section 9.7).
Commissioning the TNC 122:
•
Switch on the control.
•
Activate the appropriate PLC program and machine parameters with the code number as
follows:
– Press the MOD key
– Enter code number 77 80 83
– Press the ENT key
– Press the MOD key
– Enter the appropriate code number from the above list
– Press the ENT key
Depending on the model of machine and its mechanical condition it may be necessary
to re-optimize the machine parameters that affect the control loop. especially
parameters MP1010, MP1030, MP1050, MP1051, MP1060, MP1810 and MP1850.
This requires checking the analog output and the tachometer voltage with an
oscilloscope.
•
If desired, set the software limit switch ranges to conform to maximum permissible traverse.
Note:
The software limit switches are always referenced to a fixed reference mark!
Ensure that the same reference mark is always used for referencing.
Test all functions.
11 Machine Parameters
11.1 Entering and Changing Machine Parameters
A list of machine parameters is accessible through the MOD function Code number in the manual
operation mode. To call the complete list of machine parameters, enter the code number 95148. A
subset of MOD functions is more readily available through the MOD function User parameters. The
machine parameters included in the user parameters are indicated in the following list with *). It is
possible to change these parameters.
The values of the machine parameters can be changed as follows:
•
Select the list of machine parameters.
•
Use the arrow key to select the desired machine parameter.
•
Enter the new value.
•
Confirm your entry by pressing ENT.
To leave the list of machine parameters, press DEL.