Cycle 1420 PROBING IN PLANE

Application

Touch probe cycle 1420 finds the angles of a plane by measuring three points. It saves the measured values in the Q parameters.

If you program Cycle 1493 EXTRUSION PROBING before this cycle, you can repeat probing points in a given direction over a specified distance.

Cycle 1493 EXTRUSION PROBING

  • Furthermore, you can perform the following operations with Cycle 1420:
  • If the probing position relative to the current datum is unknown, you can execute the cycle in semi-automatic mode.
  • Semi-automatic mode

  • Optionally, the cycle can monitor the tolerances. That way you can monitor the position and size of an object.
  • Evaluation of tolerances

  • If you determine the actual position in advance, you can transfer it to the cycle as the actual position.
  • Transferring the actual position

Cycle sequence

cyc1420
  1. Following the positioning logic, the control positions the touch probe to the programmed touch point 1 at rapid traverse FMAX_PROBE.
  2. Positioning logic

  3. The control then moves the touch probe to set-up clearance at rapid traverse FMAX_PROBE. The sum of Q320, SET_UP and the ball-tip radius is taken into account when probing in any probing direction.
  4. Next, the touch probe moves to the entered measuring height and probes the first touch point at the probing feed rate F from the touch probe table.
  5. The control offsets the touch probe by the safety clearance in the direction opposite to the direction of probing.
  6. If you programmed retraction to clearance height Q1125, the touch probe returns to clearance height.
  7. It then moves in the working plane to touch point 2 to measure the actual value of the second touch point in the plane.
  8. The touch probe returns to the clearance height (depending on Q1125), then moves in the working plane to touch point 3 and measures the actual position of the third point of the plane.
  9. Finally, the control retracts the touch probe to the clearance height (depending on Q1125) and saves the measured values in the following Q parameters:

Q parameter
number

Meaning

Q950 to Q952

Measured position 1 in the main axis, secondary axis, and tool axis

Q953 to Q955

Measured position 2 in the main axis, secondary axis, and tool axis

Q956 to Q958

Measured position 3 in the main axis, secondary axis, and tool axis

Q961 to Q963

Measured spatial angle SPA, SPB, and SPC in the W-CS

Q980 to Q982

Measured deviations of touch point 1

Q983 to Q985

Measured deviations of touch point 2

Q986 to Q988

Deviation 3 of the positions

Q183

  • Workpiece status
  • –1 = Not defined
  • 0 = Good
  • 1 = Rework
  • 2 = Scrap

Q970

If you have programmed Cycle 1493 EXTRUSION PROBING before:

Mean value of all deviations from the ideal line of the first touch point

Q971

If you have programmed Cycle 1493 EXTRUSION PROBING before:

Mean value of all deviations from the ideal line of the second touch point

Q972

If you have programmed Cycle 1493 EXTRUSION PROBING before:

Mean value of all deviations from the ideal line of the third touch point

Notes

 
Notice
Danger of collision!
If you do not retract the touch probe to clearance height between two objects or touch points, there is danger of collision.
  1. Always move to clearance height between objects or touch points
 
Notice
Danger of collision!
When running touch probe cycles 444 and 14xx, no coordinate transformations must be active (e.g., Cycles 8 MIRRORING, 11 SCALING FACTOR, 26 AXIS-SPECIFIC SCALING, TRANS MIRROR).
  1. Reset any coordinate transformations before the cycle call.
  • This cycle can only be executed in the FUNCTION MODE MILL machining mode.
  • The control can calculate the angle values only if the three touch points are not positioned on a straight line.
  • The nominal spatial angle results from the defined nominal positions. The control saves the calculated spatial angle in parameters Q961 to Q963. The control transfers the difference between the measured spatial angle and the nominal spatial angle to the basic rotation in 3-D of the preset table.
 
Tip
  • HEIDENHAIN recommends avoiding the use of axis angles in this cycle!

Aligning the rotary table axes:

  • Alignment with rotary table axes is possible only if two rotary table axes have been defined in the kinematics..
  • To align the rotary table axes, (Q1126 not equal to 0), the rotation must be used (Q1121 not equal to 0). Otherwise, an error message will be displayed.

Cycle parameters

Help graphic

Parameter

cyc1420_1

cyc1420_2

Q1100 1st noml. position of ref. axis?

Absolute nominal position of the first touch point in the main axis of the working plane

Input: –99999.9999...+99999.9999 or optionally ?, -, +, @

Q1101 1st noml. position of minor axis?

Absolute nominal position of the first touch point in the secondary axis of the working plane

Input: –99999.9999...+9999.9999 or optional input (see Q1100)

Q1102 1st nominal position tool axis?

Absolute nominal position of the first touch point in the tool axis

Input: –99999.9999...+9999.9999 or optional input (see Q1100)

Q1103 2nd noml. position of ref axis?

Absolute nominal position of the second touch point in the main axis of the working plane

Input: –99999.9999...+9999.9999 or optional input (see Q1100)

Q1104 2nd noml. position of minor axis?

Absolute nominal position of the second touch point in the secondary axis of the working plane

Input: –99999.9999...+9999.9999 or optional input (see Q1100)

Q1105 2nd nominal pos. of tool axis?

Absolute nominal position of the second touch point in the tool axis of the working plane

Input: –99999.9999...+9999.9999 or optional input (see Q1100)

Q1106 3rd noml. position of ref axis?

Absolute nominal position of the third touch point in the main axis of the working plane.

Input: –99999.9999...+9999.9999 or optional input (see Q1100)

Q1107 3rd noml. position minor axis?

Absolute nominal position of the third touch point in the secondary axis of the working plane

Input: –99999.9999...+9999.9999 or optional input (see Q1100)

Q1108 3rd nominal position tool axis?

Absolute nominal position of the third touch point in the tool axis of the working plane

Input: –99999.9999...+9999.9999 or optional input (see Q1100)

cyc1420_3

cyc1420_4

Q372 Probe direction (–3 to +3)?

Axis defining the direction of probing. With the algebraic sign, you define the positive or negative direction of traverse of the probing axis.

Input: –3, -2, -1, +1, +2, +3

Q320 Set-up clearance?

Additional distance between touch point and ball tip. Q320 is 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. The value has an absolute effect.

Input: –99999.9999...+99999.9999 or PREDEF

Q1125 Traverse to clearance height?

Positioning behavior between the touch points:

–1: Do not move to clearance height.

0: Move to clearance height before and after the cycle. Pre-positioning occurs at FMAX_PROBE.

1: Move to clearance height before and after each object. Pre-positioning occurs at FMAX_PROBE.

2: Move to clearance height before and after each touch point. Pre-positioning occurs at FMAX_PROBE.

Input: –1, 0, +1, +2

Q309 Reaction to tolerance error?

Reaction when tolerance is exceeded:

0: Do not interrupt program run when tolerance is exceeded. The control does not open a window with the results.

1: Interrupt program run when tolerance is exceeded. The control opens a window with the results.

2: The control opens a window with the results if the actual position is in the scrap range. Program run is interrupted. The control does not open a window with the results if rework is necessary.

Input: 0, 1, 2

Q1126 Align rotary axes?

Position the rotary axes for inclined machining:

0: Retain the current position of the rotary axis.

1: Automatically position the rotary axis, and orient the tool tip (MOVE). The relative position between the workpiece and touch probe remains unchanged. The control performs a compensating movement with the linear axes.

2: Automatically position the rotary axis without orienting the tool tip (TURN).

Input: 0, 1, 2

Q1120 Transfer position?

Define which touch point will be used to correct the active preset:

0: No correction

1: Correction based on the 1st touch point

2: Correction based on the 2nd touch point

3: Correction based on the 3rd touch point

4: Correction based on the averaged touch point position

Input: 0, 1, 2, 3, 4

Q1121 Confirm basic rotation?

Define whether the control will use the determined misalignment as a basic rotation:

0: No basic rotation

1: Set basic rotation: The control will save the basic rotation

Input: 0, 1

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 1420 PROBING IN PLANE ~

Q1100=+0

;1ST POINT REF AXIS ~

Q1101=+0

;1ST POINT MINOR AXIS ~

Q1102=+0

;1ST POINT TOOL AXIS ~

Q1103=+0

;2ND POINT REF AXIS ~

Q1104=+0

;2ND POINT MINOR AXIS ~

Q1105=+0

;2ND POINT TOOL AXIS ~

Q1106=+0

;3RD POINT REF AXIS ~

Q1107=+0

;3RD POINT MINOR AXIS ~

Q1108=+0

;3RD POINT MINOR AXIS ~

Q372=+1

;PROBING DIRECTION ~

Q320=+0

;SET-UP CLEARANCE ~

Q260=+100

;CLEARANCE HEIGHT ~

Q1125=+2

;CLEAR. HEIGHT MODE ~

Q309=+0

;ERROR REACTION ~

Q1126=+0

;ALIGN ROTARY AXIS ~

Q1120=+0

;TRANSER POSITION ~

Q1121=+0

;CONFIRM ROTATION