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

HAAS ST20Y Lessons

ST20Y CNC Lathe Safety
ST20Y CNC Lathe Safety

- The HAAS ST20Y lathe is just like the other CNC lathes that are in the lab. Make sure you use all the safety measures that you have learned in your previous classes.
- The main safety concern is running the turret into the guarding of the machine or your part being machine.
- Make sure that you jog the machine to ensure that there is clearance around the machining area of your part.
- There are some extra concerns when using live tooling. Clearance is the major concern.
- The first area to check is the clearance between the turret and the tailstock as shown in the picture to the right.
- In normal CNC lathe program you have learned to always program a G28 before each tool change, to ensure that the turret does not rotate into the work or chuck.
- For making tool changes when programming a live tooling live good practice would be to use the following machine home commands.

G00 X2.00 Z.200 (positioned back to the starting point of program)

G28 U0 (Positions the turret to home in the X axis)

G28 W0 (Positions the turret to home in the Z axis)

T202
Other areas of concern is cutting tool lengths when cutting with other cutting tools.

- As shown in the middle picture the drill bit is not being used, but may move into the guarding when using other shorter cutting tools.
- Make sure you call up the shortest cutting tool that you are using in the program and jog the machine to the maximum Z dimension to check clearance.
- When using live tooling the bodies of the motors might cause problems.
- Always check your length of the cutting tools in the live tooling to ensure that there is enough tool length to get to the X dimension in your program.
- Also check the clearance between the motors and any other obstacles that might be in the machining area.
- The picture to the right shows the clearance between the live tool motor and the tool touch off probe.