Defining the spindle speed for turning with FUNCTION TURNDATA SPIN

Application

With turning you can machine both at constant spindle speed and constant cutting speed.

Use FUNCTION TURNDATA SPIN to define the speed.

Requirement

  • Machine with at least two rotary axes, one of them as a rotary table axis
  • Software option Turning (#50 / #4-03-1)

Description of function

If you machine at constant cutting speed VCONST:ON, the control modifies the speed according to the distance of the tool tip to the center of the turning spindle. For positioning movements toward the center of rotation, the control increases the table speed; for movements away from the center of rotation, it reduces the table speed.

For processing with constant spindle speed VCONST:Off, speed is independent of the tool position.

With FUNCTION TURNDATA SPIN you can define a maximum speed for the constant speed.

Input

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.

11 FUNCTION TURNDATA SPIN VCONST:ON VC:100 GEARRANGE:2

; Constant surface speed with gear range 2

To navigate to this function:

Insert NC function All functions Special functions Turning functions Basic functions FUNCTION TURNDATA SPIN

The NC function includes the following syntax elements:

Syntax element

Meaning

FUNCTION TURNDATA SPIN

Syntax initiator for speed definition in turning mode

VCONST OFF or ON

Definition of a constant cutting speed or constant surface speed

Optional syntax element

VC

Value for the surface speed

Optional syntax element

S or SMAX

Constant speed or speed limitation

Optional syntax element

GEARRANGE

Gear range for the lathe spindle

Optional syntax element

Notes

  • If you machine at constant cutting speed, the selected gear range limits the possible spindle speed range. The possible gear ranges (if applicable) depend on your machine.
  • When the maximum speed has been reached, the control displays SMAX instead of S in the status display.
  • To reset the speed limitation, program FUNCTION TURNDATA SPIN SMAX0.
  • In turning mode, the spindle potentiometer is active for the turning spindle (rotary table).
  • Cycle 800 limits the maximum spindle speed during eccentric turning. The control restores a programmed limitation of the spindle speed after eccentric turning.
  • Cycle 800 ADJUST XZ SYSTEM