 |
| ||||||||||||||||||||||||||||||
Handling of measuring tools:
- The ambient temperature should be 90° C if possible.
- Put the line rules parallel to the measured length.
- Read off the measured value at an optical angle of 90°.
- The joints of the folding rule must be fully stretched.
- Put on and use the vernier caliper carefully.
Figure 12 Reading off the measured
value vertically
1 reading off the measured value at an optical angle of 90°
Scribing parallel to the edge:
- Scribe by marking off measures on two or three points.
- Link the markings with the straigthedge and the pencil.
- Scribe with the marking gauge:
· Set the steel points of the marking gauge to the finished dimensions.
· Put the marking gauge against the angle edge (reference edge) of the workpiece.
· Lead the marking gauge along the edge and scribe with the steel points.
Figure 13 Marking off measures for a
parallel marking
1 straightedge, 2 points for marking off the measures
Figure 14 Setting the marking gauge
Scribing at right angles to the edge:
- Apply a working square.
- For markings over or under 90° use a mitre square or a bevel protractor.
|
Handle the bevel protractor carefully - check the set angle from time to time! |
Scribing with templates:
- Handle and preserve the templates carefully for reuse.
- In case of longish forms of the workpiece pay regard to the fibre flow of the wood.
Why must the joints of the folding rule be fully
stretched?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
Why should the marking gauge always be put against the angle
face of the
workpiece?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
Why must the angle of bevel protractors be checked from time to
time?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
 |
