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B.1.a For Horizontal Move
) during uniform motion(Pac)
Pac=W+F+fbn(13)
)during accelerating(Paa)
Paa=W+F+fbn+(m+mbn)a(14)
)during decelerating(Pad)
Pad=W+F+fbn-(m+mbn)d(15)
B.1.b For Vertical Move
) during uniform motion(Pac)
Pac=(m+mbn)g+F+fbn(16)
)during accelerating(Paa)
Paa=(m+mbn)g+F+fbn+(m+mbn)a(17)
)during decelerating(Pad)
Pad=(m+mbn)g+F+fbn-(m+mbn)d(18)
I-15
B.1.c. Obtain the average axis-directional load (Pa) using an appropriate formula among those shown above
depending on the application.
Pa = ( Paa (11)
3 S1+ Pac 3 S2+ Pad 3 3
1
S3)
(S1+S2+S3)
Pa:average axis-directional load (N)
S1:travel distance during accelerating (mm) (see Table I-14)
S2:travel distance during uniform motion (mm) (see Table I-14)
S3:travel distance during decelerating (mm) (see Table I-14)
Paa:axis-directional load during accelerating (N): formulas (14) and (17)
Pac:axis-directional load during uniform motion (N): formulas (13) and (16)
Pad:axis-directional load during decelerating (N): formulas (15) and (18)
Table I-11 Sliding Resistance (fb) of a Single Block (Seal Resistance)
unit: N
high class (H) precision class (P)
BG20
2.3
4.9
BG26
5.4
9.8
BG33
4.4
10.2
BG46
7.4
13.3
BG55
9
16
Pac:axis-directional load rating during uniform motion (N)
Paa:axis-directional load rating during accelerating (N)
Pad:axis-directional load rating during decelerating (N)
:friction coefficientW:load applied to a block (N)
F:external force (load) applied to the axis direction (N)
fb:sliding resistance of a single block (N) (see Table I-11)
n:number of blocks of BGm:carrying mass (kg)
mb:mass of a block of BG (kg) (see Table I-4)
a:acceleration during accelerating (m/s 3 )
d:acceleration during decelerating (m/s 3 )
SLIDE GUIDE
BALL SPLINE
ROTARY BALL SPLINE
STROKE BALL SPLINE
TOPBALL PRODUCTS SLIDE BUSH SLIDE UNIT
STROKE BUSH
SLIDEROTARYBUSH
SLIDE SHAFT
SLIDE WAY/GONIO WAY
SLIDE TABLE
MINIATURE SLIDE
ACTUATOR SLIDE SCREW