18
9.0 Surface Planing
Caution: Ensure that all stock is clear of the blades before start-up.
When surfacing, the depth of cut is set by adjusting the height of the infeed table, using the
Surface Table Rise and Fall Handle. The outfeed table is already set level with the cutting circle
of the cutterblock. The sawn finish and the straightness of the timber determine the amount of
cut required.
For normal working it is good practice to set the amount of cut to 1.5mm.
When planing rough sawn or bowed timber the amount of cut can be increased to 3mm, so as to
obtain a clean finish with one pass over the cutters.
The timber should be fed in with consideration to the grain direction. The following illustration
shows how timber fed through the cutters against the grain will cause it to tear out, producing a
ragged finish.
Always feed with the grain running down towards the front of the table when
in the planing mode, and the opposite when thicknessing.
Correct
Incorrect
Feed
Feed
Slope of grain
Slope of grain
9.1 Flatting
Workpiece dimensions:
Length
< 250mm
Only work with a push stick
>1500mm
Extn rollers or 2
nd
person reqd
Width
Max 255mm
Thickness
Min 10mm
If a workpiece is smaller than 10mm it may split if the depth of cut is too large
(4mm). The finished planed workpiece must not be thinner than 6mm.
When flatting, the wood is passed below the bridge guard, which should be within 10mm of the
timber and 10mm of the fence, as shown below:
10mm
Bridge Guard
10mm
Summary of Contents for PT255
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