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

HA5C Lessons

Setting up the Offsets for basic 5 axis machining
Setting up the Offsets for basic 5 axis machining

Work Offsets will be at different locations depending on the programmer and the parts that are being produced.

In the example below the programmer is using 2 Work Offsets.

G54 is the top of the part front left corner.

G55 is the 4 sides of the part when tilted at 90° front left corner.

Setting Work Offsets

Work Offsets can be found be using any type of tools that you have used in the past.

- Edge Finder
- Dial Test Indicator
- Probe

We will be using an edge finder find our Work Offsets.

Finding the "X" axis work offset

- Using an edge finder find the end of your part.
- Move in half the diameter of the edge finder.
- Continue to set your Work Offsets for your G54 and G55 locations.

Note:     The “A” axis offset was established when we indicated the Chick WorkHolding System.

The “Z” axis offset was established when setting Tool Length offsets.

Setting Tool Lengths

- Touch off tool 1 on top of your part at the G54 location.

- Press Tool Offset Measure button to set Tool 1 in your tool geometry page.

- Press the position page
- Highlight the Z axis on the operator column
- Press the origin button to zero the Z axis.
- You will need to find the distance from the G54 Z location
to the G55 Z location for the G55 Z value.

- When you have set your tool length and position page, set jog the cutting tool up in the Z axis.
- In the MDI screen tilt the A axis to 90 degrees

G00 A90.0
- Next using the same tool (Tool 1) touch the tool to the top of the work with the work tilt at 90 degrees.

- On the position page the value in the Z column will be the difference the G54 Z axis to the G55 Z Axis.

- Type this value into the G55 Z axis column on the Work Offset page.

- Set the rest of all your tools off the top of your G54 surface.

Do not forget to input tool diameters if you are using cutter compensation in your program!