Course: PMT 250 Multi-Axis CNC Programming (Section 060)

HA5C Lessons

Advantages of using a 5 Axis Trunnion
Advantages of using a 5 Axis Trunnion

There are 2 ways to jog the "A" and “B” axis.

1. Using the jogging key pad.

- Press the A button next to the normal X, Y, or Z axis buttons.
- Or you need to press the shift and the “A”- “B” button to enable the “B” axis.

2. Using the numeric key pad.

- On the control to jog the "A" or “B” axis you need to press the "A" or “B” button and then the handle jog button.

Then select the increment that you want to move.

Advantages of using a 5 Axis Trunnion
- Reduced machine time
- Better surface finishes
- Eliminate multiple set ups
- Eliminate costly tools and fixtures (Shorter tools can be used)
- Eliminate manual machining operations (Secondary operations)
- Machine complex parts
- Fewer competitors

Setting up the Trunnion

When setting up the 5 axis trunnion the operator must make sure that the
platter is setting flat and also the center of the platter is in the center of the tilting trunnion.

Indicating the platter flat

- Set up an indicator on the front of the platter table.
- Zero out the indicator dial.

- Rotate the spindle to check to see if the platter is setting flat.

- If the indicator does not read zero then swing the indicator.
- Jog the A axis to make the indicator read zero. (Setting the jog speed to .001)
- When indicator is reading zero from front to back go to the Work Offset page and arrow to the A axis column and press the work offset button.

Indicating the trunnion square in the X axis

- In the MDI screen type in the following code.

G54 G00 G90 A90.

- This should tilt the trunnion to 90 degrees.
- Set up an indicator on the platter on the right side.
- Jog the Y axis so the indicator is reading zero.

- Jog the X axis to the left side of the platter and take a reading.

- Take an indicator reading and tap the trunnion half the amount to make it square to the table.  (Just like indicating a vise)