What was in the Cutting Machine Operator Exam? (Winter 2024)
What was included in the machining exam? If you took the exam or are preparing for the upcoming one, you can watch the simulations of the machined exam pieces on our YouTube channel!
Note: These videos are available in German only.
- Interested to see it? Click on this link to watch the video: https://www.youtube.com/@CNCKELLERGmbH
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

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Milling Grooves on the Face – How to Get It Right with Driven Tools
Using the 3D simulation of our SYMplus™ CNC software, we will show you how task 8 from Christiani’s “Collection of tasks in CNC Milling technology according to PAL2020 with Driven Tools” could look like in reality.
This task includes:
- Milling on the face (driven tools)
- Round groove, cycle G75
- 2 rectangular pockets, concentric to the groove’s starting semicircle
- 2-sided machining
- T-slot cutter
- Interested to see it? Click on this link to watch the video: https://www.youtube.com/@CNCKELLERGmbH
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

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New video on YouTube: Face Milling: Drilled Hole Circle (8 Holes) with Driven Tools
Using the 3D simulation of our SYMplus™ CNC software, we will show you how task 7 from Christiani’s “Collection of tasks in CNC Milling technology according to PAL2020 with Driven Tools” could look like in reality.
This task includes:
- Roughing cycle with D-plateDrilled Hole Circle with 8 holes (face milling)
- Virtual Y-axis
- Two-sided machining
- Interested to see it? Click on this link to watch the video: https://www.youtube.com/@CNCKELLERGmbH
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

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The Countdown is on! (Cutting Machine Operator Exam Winter 2024)
Next Wednesday (December 4th), it’s time – apprentices in the metal professions will put their skills to the test!
Not quite prepared yet? No worries! With the student version of our CNC learning software (Turning/Milling) ‘SYMplus™’, you can make the most of the remaining days!
- Rent affordably (and pay via PayPal, for example)
- Simple and quick
- Flexible license duration (2 weeks – 1 year)
Make the most of the remaining time and enter the exam with confidence!
- Start now and get ready for the exam: *Click here*
The KELLER.Software team wishes you the best of luck!
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

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New video on YouTube: Turning a Sleeve with Rectangular Cutouts, C+Y Axis
Using the 3D simulation of our SYMplus™ CNC software, we will show you how task 6 from Christiani’s “Collection of tasks in CNC Milling technology according to PAL2020 with Driven Tools” could look like in reality.
This task includes:
- Plan turning, drilling, roughing, finishing
- Grooving G86
- Rectangular pocket cycle G72 with program part repetition
- Milling on a chord face (G15 G19 IP3)
- Interested to see it? Click on this link to watch the video: https://www.youtube.com/@CNCKELLERGmbH
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

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CNC training at the Technikzentrum Peter Ulderup, BZZ Ulderup (KELLER.Academy)
Milling, turning, and graphical programming (CAD/CAM) with SYMplus™: The KELLER.Academy visited the “Technikzentrum Peter Ulderup” at BBZ Ulderup in Diepholz (Germany). One and a half days packed with CNC action: Whether beginners, returning learners, or seasoned pros – every participant gained valuable insights. From the PAL-based basics to insider tips and an introduction to 3+2-axis programming according to PAL, featuring machine-fixed and relative angles, and topped off with 3-point and vector programming.
A huge thank you to BBZ Ulderup for the inspiring atmosphere, the excellent catering, and the flawless organization!
Interested in further training?
- Find all the details about the KELLER.Academy here: https://cnc-keller.com/keller-academy/
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

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CNC know-how for the medical technology of tomorrow (KELLER.Academy)
CNC know-how for the medical technology of tomorrow: Thanks to the KELLER.Academy, the apprentices at hg medical GmbH had the opportunity to deepen their CNC programming skills!
In addition to basics turning with the X and Z, complex techniques with the C and Y axes, as well as tilting with spatial angles, were also covered. Finally, there was time for individual exercises tailored to the trainees’ needs.
The Head of Training Mr. Siegfried Minnich gave a positive feedback:
“Thank you for the successful programming training held at our facility!”
Our thanks go back to you – we appreciate the wonderful time and look forward to more successful trainings together!
Would you also like to take your career to the next level?
Discover the wide range of training opportunities at the KELLER.Academy now and invest in your future: https://cnc-keller.com/keller-academy/
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

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New video on YouTube: Key Surfaces with Driven Milling Cutter (Radial Tool) C+Y Axis
Using the 3D simulation of our SYMplus™ CNC software, we will show you how task 5 from Christiani’s “Collection of tasks in CNC Milling technology according to PAL2020 with Driven Tools” could look like in reality.
This task includes:
- Drilling Cycle G84
- Roughing Cycle G81 (with Relief G85)
- Thread Turning G31
- Driven Milling Cutter (two key surfaces with radial tool)
- Interested to see it? Click on this link to watch the video: https://www.youtube.com/@CNCKELLERGmbH
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

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How to: Cutting Machine Operator Exam 2024
Hey, Cutting Machine Operators Trainees! Final exam next month? These study materials will help you be well-prepared!
Watch videos instead of cramming! Our “Instant CNC” playlist provides quick explanations of CHRISTIANI exercises using CNC simulations. Perfect for quick learning!
- Playlist: Click here
Use old exams! Familiarize yourself with typical tasks with this playlist.
- Videos: Click here
PAL commands at a glance: Find all key PAL commands for turning and milling for free on our support page.
- Turning: Click here
- Milling: Click here
For the final sprint: Rent our SYMplus™ CNC learning software for an intensive crash course!
- Rent SYMplus: Click here
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

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New video on YouTube: Face Bolt Circle with Virtual Y Axis, Keyway Slot, Grooving Cycle (C+Y Axis)
Using the 3D simulation of our SYMplus™ CNC software, we will show you how task 4 from Christiani’s “Collection of tasks in CNC Milling technology according to PAL2020 with Driven Tools” could look like in reality.
This task includes:
- Face Bolt Circle (Virtual Y-Axis)
- Internal/External Finishing
- Thread Undercut, Grooving Cycle G86
- Keyway Slots 10P9
- Interested to see it? Click on this link to watch the video: https://www.youtube.com/@CNCKELLERGmbH
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!
