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Sand through

The surface to be sanded is completely removed by the sanding process.

This happens quickly by sanding thin surfaces such as varnish and veneer. It can be caused by unevenness of the workpiece at even and fix contact with the sanding belt. The sanding pressure on the raised parts of the workpiece would be higher than on the remaining area. This results in a higher material removal, which can lead to through-sanding.

Sanding of flat surfaces

The solution of the problem would be a constant sanding pressure on any part of the workpiece. This can be achieved by means of:

  • Soft sanding roller - adaptation of the sanding belt to the workpiece surface through the flexibility of the rubber roller
  • Air cushion pad - adaptation of the sanding belt to the workpiece surface through the flexibility of the air cushion
  • Segmental pressure pad -adaptation of the sanding belt to the workpiece surface through controlled pressure segments
  • Segmented table - Segments in the table fitted with suspension ensure an equable sanding pressure over the whole sanding width

Failure point workpiece edge

Critical are the workpiece edges as well. At these points the sanding belt is no longer completely flat on the surface but 'wraps around' the edge slightly and may cause the edge to be sanded 'round'.

Sanding through the workpiece edges can be prevented by:

  • Plunge-controlled sanding pad at front and rear edges, see technical term 'sanding pad plunge controlled '
  • Segmental pressure pad at the side edges of the workpiece

Images

Prinzipskizze des elastischen Gliederschuhs
SCM
Variable Randsteuerung - Bedienfeld
SCM
einsetzgesteuerter Schleifschuh
SCM