Jet Tools JPM-13CS operating instructions Performance problems

15.2Performance problems

Trouble

Snipe.

Fuzzy grain.

Torn grain.

Rough/raised grain.

Rounded, glossy surface.

Poor feeding of lumber.

Wavering molding pattern.

Tearing out at end of molding.

Uneven depth of cut side to side.

Board thickness does not match depth of cut scale.

Probable Cause	Remedy
Table rollers not set properly.	Adjust rollers to proper height.
Inadequate support of long boards.	Support long boards with extension
	rollers.
Uneven feed roller pressure front to	Adjust feed roller pressure.
back.
Dull knives.	Sharpen or replace knives.
Lumber not butted properly.	Butt end-to-end each piece of stock as
	they pass through.
Planing wood with high moisture	Remove moisture by drying, or use
content.	different stock.
Dull knives.	Sharpen or replace knives.
Too heavy a cut.	Adjust proper depth of cut.
Knives cutting against grain.	Cut along the grain where possible.
Dull knives.	Sharpen or replace knives.
Dull knives.	Sharpen or replace knives.
Too heavy a cut.	Adjust proper depth of cut.
Planing wood with high moisture	Remove moisture by drying, or use
content.	different stock.
Dull knives.	Sharpen or replace knives.
Feed rate too slow.	Increase feed rate.
Cutting depth too shallow.	Increase cutting depth.
	Adjust feed roller tension. If proper
Inadequate feed roller pressure.	tension cannot be achieved, replace
	feed rollers.
Planer table rough or dirty.	Clean pitch and residue from table, and
	apply paste wax.
Belt slipping on pulleys.	Tighten belt.
Surface of feed rollers too smooth.	Lightly roughen feed roller surface with
	sandpaper.
Improper guide setup.	Review proper guide setup for molding.
Improper guide setup.	Review proper guide setup for molding.
Inadequate outfeed pressure.	Adjust feed roller tension.
Knife projection not uniform	Adjust knife projection.
Table not parallel to cutterhead.	Adjust table/cutterhead parallelism.
Depth of cut scale is incorrect.	Adjust depth of cut scale.

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