Common problems and solutions for CNC gantry and small gantry machining centers

The workpiece size is not accurate enough and the surface finish is poor

Problem causes: The tip of the CNC tool is damaged and not sharp; the small machining center is not stable, and the machining process resonates; the machining process is not ideal.

Solution: Re-grind the tool or select a better tool for tool alignment; the small machining center resonates or is not stable during the machining process, and the horizontal position should be adjusted to lay the foundation and stabilize it; the small machining center should pay attention to maintenance, clean the wire after get off work, and add lubricating oil in time to reduce friction; choose the coolant suitable for workpiece processing, and try to use a higher spindle speed if it can meet the processing requirements of other processes.

Workpiece tolerance during batch processing

The small gantry machining center has the characteristics of high precision and high efficiency. With the participation of the manipulator, it can complete the processing requirements of multiple processes through one clamping. Therefore, batch processing of complex and heterogeneous workpieces is a feature of the small machining center. The tolerance phenomenon greatly affects the qualification rate of the order workpiece.

Cause: The horizontal position of the small gantry machining center is not adjusted properly, one is high and the other is low, and the place is uneven; the workpiece material is relatively hard, and the cutter is deeper, resulting in this phenomenon.

Solution: Use a level to adjust the level of the machine tool, lay a solid foundation, fix the machine tool to improve its toughness; choose a reasonable process and appropriate cutting feed to avoid the tool being forced to let the tool go; adjust the tailstock.

The machining surface is uneven at the knife joint

Solution: Check the parallelism of the worktable, the parallelism of the main axis relative to the worktable surface, and the verticality of the lifting platform relative to the worktable surface.

The spindle gearbox operating handle falls off automatically

Solution: Replace the spring or add a gasket.

Abnormal machining accuracy

Solution:

1. Confirm that the feed unit of the large CNC gantry milling machine has not been changed;

2. Confirm that the zero offset of each axis is normal;

3. Confirm that the axial reverse clearance is normal;

4. Confirm that the motor is running normally;

5. Confirm whether the components such as the lead screw, bearings, and shaft couplings are normal.

Therefore, when we operate the small gantry machining center, it is very important to follow these operating points, which can enable us to better use the small machining center.