- Operating Principle: Step-over Turning Method
- Geometry Definition and Automated Calculations
- Tool Definition and Preparation
- Cutting Strategy and Technological Parameters
- Multi-start Worms and the “Q” Parameter (Mazak Specifics)
- Handling Workpieces Without Undercuts (Entry/Exit Motion)
- Finishing Strategy and Corrections
- Coordinate Systems and Safety (EIA/ISO vs. Mazatrol)
- Project Management and NC Code Generation
Coordinate Systems and Safety (EIA/ISO vs. Mazatrol)
Estimated reading: 2 minutes
The EvoSpline generator produces code in EIA/ISO (G-code) format. If you primarily work with Mazatrol, you must pay close attention to how tool positions are defined and how the thread direction is determined.
Z-start and Z-end: Determining the Thread Direction (Worm Hand)
In G-code (ISO), all positions located behind the part face (towards the chuck) must have a negative sign (-). For example: Z-start 0, Z-end -100.00.
Direction Verification (Worm Hand):
Before generating the code, always check the Worm hand field in the software.
- Based on your Z-start and Z-end coordinates, the program automatically determines if the result will be a Right-hand or Left-hand worm.
- Double-checking this prevents machining a costly part with the wrong thread direction.
Tool Change Position X/Z (G53)
These fields define the path the turret takes at two critical moments:
- Program Start: The machine first moves to this location to safely index (change) to the correct tool.
- Program End: After the machining is complete, the turret returns to this position to allow safe access to the part and a clear end of the cycle.
G53 Logic – Independence from Offsets: EvoSpline generates these positions using the G53 code (Absolute Machine Coordinates).
Remember: These coordinates are completely independent of the part’s Z-offset and any work coordinate shifts (G54, G55, etc.). Even if you shift the part zero 200 mm deeper into the machine, the turret will always stop at the exact same physical machine point for the tool change.