Cutting Accuracy - Hitachi C 12FSA Technical Data And Service Manual

11-9. Cutting Accuracy

Cut appropriate workpieces, measure the squareness with a square or other measuring devices and confirm that
accuracy is within the standards listed below.
[CAUTION] The test workpieces must be processed with a planer, and their rectangularity and surface
flatness must be checked carefully prior to cutting tests. Improper or inaccurate workpieces are useless
for checking the cutting accuracy of the machine.
(1) Press cutting
Cutting conditions:
Test piece : Yellow pine 90 mm (3-17/32") square piece
[Test piece for 45˚ miter cutting: 90 x 65 mm (3-17/32" x 2-9/16")]
Saw blade : 305 mm (12") TCT saw blade, number of teeth: 96 (Code No. 310875)
Cutting time : 0˚ cutting
45˚ cutting
Measurement points
Cutting accuracy:
Wood test piece
(1) Slide cutting
Cutting conditions:
Test piece : Yellow pine H 30 mm (1-3/16") x W 240 mm (9-7/16")
Saw blade : 305 mm (12") TCT saw blade, number of teeth: 96 (Code No. 310875)
Cutting time : 0˚ cutting
Measurement points
10 secs.
• • • • • • • • • • •
15 secs.
• • • • • • • • • •
Square
[150 x 100 mm (6" x 4")]
Wood test piece
Fig. 77
10 secs., 45˚ cutting
• • • • • • • • • •
Wood test piece
• • • • • • • • • • • • •
Wood test piece
Angle gauge
[150 x 100 mm (6" x 4")]
15 secs.
• • • • • • • • • •
Fence mounting surface
Cut surface
Turn table mounting surface
Square [150 x 100 mm (6" x 4")]
Fig. 78
--- 46 ---
All surface squarely planed.
Fence mounting surface
Cut surface
Turn table mounting surface
Square
[150 x 100 mm (6" x 4")]
Fig. 76
Accuracy
Angle
0.1 mm (0.004")
0˚
0.15 mm (0.006")
45˚
All surfaces squarely planed.
• • • • • • • • • •
Square
[300 x 200 mm (12" x 8")]
δ
Maximum
Maximum