C3 - LT#3 - Use a Thickness Planer

Question 1

What is the main task of a thickness planer (ONLY TASK…)

Answer 1

It dress lumber to a uniform thickness

Question 2

What control on a thickness planer sets the thickness of the lumber will be after it has been planed?

Answer 2

Elevating wheel & lock

Question 3

What is the PRO of segmented infeed rollers in a thickness planer?

Answer 3

Allow feeding pieces of stock that are a different thickness through the planer at the same time

Question 4

What is the purpose of the upper outfeed roller?

Answer 4

It pulls lumber through the planer after it clears the infeed roller

Question 5

Explain the role of the lower rollers in a planing operation?

Answer 5

Prevents lumber from dragging too heavily on the table

Question 6

Which part of the thickness planer directs the flow of chips away form the operator

Answer 6

Chip guard

Question 7

In which direction should the grain slope when you plane lumber in a thickness planer?

Answer 7

Must slope downward toward the front of the stock

Question 8

In a single pass through a thickness planer, wide boards should have no more than how much stock removed.

Answer 8

1 mm

Question 9

The thickness planer is known as a specialty machine because it only does one thing

Answer 9

True

Question 10

To obtain a straight, flat cut in a thickness planer, lumber must be:

Answer 10

Bottom must be straight and flat

Question 11

Explain how lumber must be turned in order to have both sides planed with the grain

Answer 11

Turn the stock over and end for end

Question 12

When you feed lumber into a thickness planer, where should you stand?

Answer 12

To the side

Question 13

Before starting the thickness planer, clean away debris from the where?

Answer 13

Lower the table & remove any shavings, loose knots and slivers of wood from the table and roller assembly

Question 14

Most thickness planers remove no more than how many MM?

Answer 14

3 mm

Question 15

What should you do if a stock gets stuck or the cutter stalls in operation?

Answer 15

1) Turn off
2) Lower bed
3) Remove stock

Question 16

What adjustments should you make when you plane wide planks in a thickness planer?

Answer 16

The amount removed in ea. pass should be reduced to prevent overheating the motor or stalling the cutter.

Question 17

What happens to the thickness planer if you try to plane-painted or varnished lumber?

Answer 17

The finish will quickly dull the blades

Question 18

What happens if the grain of the plank you run through a thickness planer is in the wrong direction?

Answer 18

Produces a chipped surface

Question 19

In the correct sequence, name the parts of a planer the UPPER surface of a plank touches as it goes through the machine.

Answer 19

1) Infeed roller
2) Chip breaker
3) Cutterhead
4) Pressure bar
5) outfeed roller

Question 20

If you remove too much stock at one time with a thickness planer, you risk overheating what?

Answer 20

The motor

Question 21

If the plank you want to plane is thicker at one end than at the other, what should you do?

Answer 21

Insert thick end first - prevents jamming or stalling

Question 22

You risk pinching your fingers if your stock is

Answer 22

Too short

Question 23

What should you use to remove dirt, pitch and gum from the surface of a thickness planer?

Answer 23

Petroleum-based solvent to clean all accumulations

Question 24

Why is it important to clean the rollers of a thickness planer?

Answer 24

Accumulation will leave the indentations on the lumber

Question 25

If stock hesitates or sticks in a planer, what could be the issue?

Answer 25

Lower roller could be set too low

Question 26

What can cause lumber to chatter as it passes through a thickness planer?

Answer 26

Lower roller is set TOO HIGH

Question 27

If you find that lumber does not leave a planer properly, what might be the cause?

Answer 27

The pressure bar may be set too low

Question 28

The rotation of knives in the cutterhead (planer)

Answer 28

4000 & 20 000

Question 29

Are both the rollers Upper infeed and outfeed powered?

Answer 29

Yes and spring loaded

Question 30

Purpose of lower rollers (Planer)

Answer 30

1) Prevents lumber from dragging too heavily on table
2) may be idlers or under power

Question 31

Spring loaded pressure bar presses lumber to prevent

Answer 31

Chattering

Question 32

The chip breaker prevents knives from

Answer 32

Tearing long slivers from the wood

Question 33

What is the average feeding rate for planers?

Answer 33

About 16 to 20 feet per minute

Question 34

Planing against or with the grain?

Answer 34

With the grain

Question 35

The maximum amount of stock removed with each pass?

Answer 35

not to exceed 3 mm on wide 1 mm

Question 36

Bowed, the warped and twisted stock should have what?

Answer 36

Have one surface jointed before it passes through