28/08/2026
30 meters of travel.
Error reduced from 0.5 mm to 0.01 mm.
Two independent drives operating as a single unit.
A few days ago, our team was on-site at a client's facility carrying out the advanced calibration of the massive GMC 250 CNC gantry milling machine. There is no compromise in heavy machining, which is why we verify geometry and feedback systems using a laser interferometer.
What makes this calibration a heavy-duty engineering challenge?
• Scale: The installed linear scales are 30 meters long—both on the X1 and X2 axes.
• Gantry synchronization: The X1 and X2 axes are software- and hardware-coupled via a gantry axis function, forming a unified X-axis that drives the smooth, powerful motion of the multi-ton gantry.
• Laser precision: Using the Renishaw laser system allowed us to reduce positioning errors 𝗳𝗿𝗼𝗺 𝟬.𝟱 𝗺𝗺 𝗱𝗼𝘄𝗻 𝘁𝗼 𝗷𝘂𝘀𝘁 𝟬.𝟬𝟭 𝗺𝗺, compensate for thermal expansion, and achieve perfect guideway parallelism along the entire 30-meter bed.
The result? A machine tool of monumental scale delivering the precision typically expected of compact toolroom centers.
At DTi Machine Tools, we know that a rigid, heavy structure is just the starting point—laser precision is what truly defines the quality of every cut.
👉 See how we build our gantry machine tools: [https://www.dti.com.pl/gantry-milling-machines-gmc/]