Horizontal‑Spindle Rotary‑Table Surface Grinder: Quick Troubleshooting for Uneven Worktable Rotation

Uneven worktable rotation is a common precision‑related abnormality during the processing of horizontal‑spindle rotary‑table surface grinders. Fault points can be located in the following three steps.

First, check whether the output frequency of the frequency converter remains stable. Observe the output waveform of the frequency converter with an oscilloscope to identify parameter drift or harmonic interference. The rotary‑table surface grinder adopts a variable‑frequency speed‑regulating motor to drive table rotation with stepless speed adjustment. Nevertheless, parameter drift of the frequency converter will directly impair the rotation smoothness of the rotary table.

Second, inspect the oil‑film condition of the hydrostatic guideway. The annular worktable guideway of the horizontal‑spindle rotary‑table grinder adopts throttling hydrostatic guideway with hydrostatic sliding lubrication. The reasonableness of oil‑supply pressure can be judged by observing crawling marks during worktable movement. A continuous and uniform oil‑wedge layer shall be formed under ideal conditions. In case of stick‑slip caused by discontinuous oil supply, clean the throttler and verify the matching of capillary tube diameters. Shandong Linmo rotary‑table surface grinders implement strict control over the stability of guideway support systems.

Third, examine the wear level of the worm‑gear set inside the reduction mechanism. Regular lubricant application can slow down wear. Coating molybdenum disulfide solid lubricant on meshing areas every six months serves as an effective preventive measure. If uneven worktable rotation persists over a long period, it is recommended to set up equipment health files to record historical maintenance data for convenient root‑cause tracing.