Back Spotface

Use the Back Spotface function to cut out the underside of holes that must be cut through the workpiece.

To program a new Back Spotface operation:

1. Display the Input screen and select the Part Programming softkey.

2. Select the Insert Block Before softkey.

3. Select the Holes softkey. The Hole Operation screen opens.

4. Select the Back Spotface softkey.

This motion sequence occurs with Back Spotface:

1. Rapid to Z Start minus cutter offset and set the spindle speed to a plunge speed.

2. Move to Z Plunge minus cutter offset at a closing feedrate to close the cutter.

3. Rapid to Z Bottom minus cutter offset.

4. Dwell for a specified reverse dwell amount, reverse the spindle direction and ramp to cutting speed to open the cutter.

5. Move up to Z Depth minus cutter offset at a cutting feedrate.

6. Dwell for the drill dwell time (from program parameters).

7. Rapid down a Z Clearance amount.

8. Dwell for the Reverse Dwell time and reverse the spindle direction to plunge speed to close the cutter.

9. Move to Z Retract minus cutter offset at a closing feedrate to insure the cutter is closed.

10. Rapid out of the hole.

See the Field Glossary for definitions of the Back Spotface fields: