x-Lab Dot Matrix Printer XDP-321 User's Manual
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Item
Mark
Size
n
o
it
c
n
u
F
)
m
m
(
Position of Central line
A
6.0 ± 0.7
The distance from central line to the nearer
edge. The standard distance is 6.35mm.
Diameter of gear hole
D
4.0 ± 0.1
It is the hole with gear edge, its minimal
diameter is the D value and its maximal
diameter is 4.5mm.
When using the multi-ply paper with gear holes,
it is allowed that the diameter of the gear hole is
bigger than 4.1mm.
Distance between gear
holes center
B
12.70 ± 0.05
Distance between nearby gear holes center in
the same side.
Accumulative error of
distance between gear
holes center
–
Below ± 0.3 The accumulative error along the central line of
any two gear holes which are 254mm apart.
Warp of gear hole center
C
Below 0.1
The maximal warp of the gear holes center in
the same side.
Central warp of right and
left gear holes.
E
Below 0.15
The warp value of the beeline which
perpendiculars to central line through any gear
B
Central line
Central line
Transverse perforation
Vertical perforation
Vertical perforation
Transverse perforation
90°
C
C
e
g
d
E
e
g
d
E
A
D
E
A
Figure of tractor paper specification and gear hole
