Cycle 423 MEAS. RECTAN. INSIDE (#17 / #1-05-1)

ISO programming

G423

Application

Touch probe cycle 423 finds the center, length, and width of a rectangular pocket. If you define the corresponding tolerance values in the cycle, the control makes a nominal-to-actual value comparison and saves the deviation values in Q parameters.

 
Tip

Instead of Cycle 423 MEAS. RECTAN. INSIDE, HEIDENHAIN recommends using the more powerful Cycle 1403 RECTANGLE PROBING.

Cycle run

  1. The control positions the touch probe to the pre-position of the first touch point 1, using positioning logic.
  2. Positioning logic

  3. Next, the touch probe moves to the entered measuring height and probes the first touch point at the probing feed rate (F column).
  4. Then the touch probe moves either paraxially at measuring height or at clearance height to the next touch point 2 and probes again.
  5. The control positions the touch probe to touch point 3 and then to touch point 4 to probe two more times.
  6. Finally, the control returns the touch probe to the clearance height and saves the actual values and deviations in the following Q parameters:

Q parameter
number

Meaning

Q151

Actual value of center in reference axis

Q152

Actual value of center in minor axis

Q154

Actual value of side length in the reference axis

Q155

Actual value of side length in the minor axis

Q161

Deviation at center of reference axis

Q162

Deviation at center of minor axis

Q164

Deviation of side length in the reference axis

Q165

Deviation of side length in minor axis

Notes

  • This cycle can be executed only in the FUNCTION MODE MILL machining mode.
  • If the dimensions of the pocket and the set-up clearance do not permit pre-positioning in the proximity of the touch points, the control always starts probing from the center of the pocket. In this case, the touch probe does not return to the clearance height between the four measuring points.
  • Tool monitoring is dependent on the deviation of the first side length.
  • The control will reset an active basic rotation at the beginning of the cycle.

Note on programming

  • Before defining this cycle, you must have programmed a tool call to define the touch probe axis.

Cycle parameters

Help graphic

Parameter

Q273 Center in 1st axis (nom. value)?

Center of the pocket in the main axis of the working plane. This value has an absolute effect.

Input: –99999.9999...+99999.9999

Q274 Center in 2nd axis (nom. value)?

Center of the pocket in the secondary axis of the working plane. This value has an absolute effect.

Input: –99999.9999...+99999.9999

Q282 1st side length (nominal value)?

Pocket length, parallel to the main axis of the working plane

Input: 0...99999.9999

Q283 2nd side length (nominal value)?

Pocket length, parallel to the secondary axis of the working plane

Input: 0...99999.9999

Q261 Measuring height in probe axis?

Coordinate of the ball tip center in the touch probe axis in which the measurement will be performed. This value has an absolute effect.

Input: –99999.9999...+99999.9999

Q320 Set-up clearance?

Additional distance between touch point and ball tip. Q320 is active in addition to the SET_UP column in the touch probe table. This value has an incremental effect.

Input: 0...99999.9999 or PREDEF

Q260 Clearance height?

Coordinate in the tool axis at which no collision between touch probe and workpiece (fixtures) can occur. This value has an absolute effect.

Input: –99999.9999...+99999.9999 or PREDEF

Q301 Move to clearance height (0/1)?

Define how the touch probe will move between the measuring points:

0: Move to measuring height between measuring points

1: Move to clearance height between measuring points

Input: 0, 1

Q284 Max. size limit 1st side length?

Maximum permissible length for the pocket

Input: 0...99999.9999

Q285 Min. size limit 1st side length?

Minimum permissible length for the pocket

Input: 0...99999.9999

Q286 Max. size limit 2nd side length?

Maximum permissible width for the pocket

Input: 0...99999.9999

Q287 Min. size limit 2nd side length?

Minimum permissible width for the pocket

Input: 0...99999.9999

Q279 Tolerance for center 1st axis?

Permissible position deviation in the main axis of the working plane.

Input: 0...99999.9999

Q280 Tolerance for center 2nd axis?

Permissible position deviation in the secondary axis of the working plane.

Input: 0...99999.9999

Q281 Measuring log (0/1/2)?

Define whether the control will create a measuring log:

0: Do not create a measuring log.

1: Create a measuring log: The control will save the log file named TCHPR423.TXT in the folder that also contains the associated NC program.

2: Interrupt program run and display the measuring log on the control screen.Resume the NC program run with NC Start.

Input: 0, 1, 2

Q309 PGM stop if tolerance exceeded?

Define whether in the event of a violation of tolerance limits the control will interrupt program run and output an error message:

0: Do not interrupt program run; no error message

1: Interrupt program run and output an error message

Input: 0, 1

Q330 Tool for monitoring?

Define whether the control should perform tool monitoring:

0: Monitoring not active

> 0: Tool number in tool table TOOL.T

Input: 0...99999.9 or max. 255 characters

Tool monitoring

NC programs contained in this User's Manual are suggestions for solutions. The NC programs or individual NC blocks must be adapted before being used on a machine.

Change the following contents as needed:

  • Tools
  • Cutting parameters
  • Feed rates
  • Clearance height or safe position
  • Machine-specific positions (e.g., with M91)
  • Paths of program calls

Some NC programs depend on the machine kinematics. Adapt these NC programs to your machine kinematics before the first test run.

In addition, test the NC programs using the simulation before the actual program run.

 
Tip

With a program test you determine whether the NC program can be used with the available software options, the active machine kinematics and the current machine configuration.

Example

11 TCH PROBE 423 MEAS. RECTAN. INSIDE ~

Q273=+50

;CENTER IN 1ST AXIS ~

Q274=+50

;CENTER IN 2ND AXIS ~

Q282=+80

;FIRST SIDE LENGTH ~

Q283=+60

;2ND SIDE LENGTH ~

Q261=-5

;MEASURING HEIGHT ~

Q320=+0

;SET-UP CLEARANCE ~

Q260=+10

;CLEARANCE HEIGHT ~

Q301=+1

;MOVE TO CLEARANCE ~

Q284=+0

;MAX. LIMIT 1ST SIDE ~

Q285=+0

;MIN. LIMIT 1ST SIDE ~

Q286=+0

;MAX. LIMIT 2ND SIDE ~

Q287=+0

;MIN. LIMIT 2ND SIDE ~

Q279=+0

;TOLERANCE 1ST CENTER ~

Q280=+0

;TOLERANCE 2ND CENTER ~

Q281=+1

;MEASURING LOG ~

Q309=+0

;PGM STOP TOLERANCE ~

Q330=+0

;TOOL