Lenze DSD - Manual (Page 142)

7 Applications
7.11 Roller conveyor
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Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
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7.11.2.6 Number of wrapped chain turns
7.11.2.7 Additional force
7.11.2.8 Angle of tilt
Application with a slope (slide)
For the angle of tilt, only a positive value (slope) can be entered. However, you can dimension an ap-
plication with a slope by specifying a negative speed. If the application is moving on a slope with
negative speed, it goes backwards.
Procedure:
• Enter the value of the slope into the Angle of tilt input field.
• Enter the value with a negative sign into the Speed input field.
7.11.2.9 Coefficient of friction of the bearing
Symbol Description
N
Chn
• Number of chain wraps which distribute the torque to the single rolls. For calculation, the
most unfavourable efficiency is assumed (load is applied to the last driven roll).

Note!
When the power is transmitted from the drive to the transport rollers, the efficiency
η
Chn
of the chain is reduced with every chain wrap.
• The efficiency η
Chn
exponentiates with the number of chain wraps N
Chn
.
• Position the drive centrally if necessary to distribute the power transmission to two
paths. That way, the number of chain wraps per path is also reduced.
• Realistic values must be assumed for the efficiency η
Chn
.
Symbol Description
F
add
The additional force results from backing forces, lateral friction, deflectors, etc.
• The backing force can be calculated using the auxiliary calculator.
"Backing force (material handling technology)" calculator ( 418)
Symbol Description
β Angle of tilt (gradient)
• The value can be entered in degrees or as a percentage.
• The max. angle of tilt as a first approximation is: arctan(μ
L
)
(static friction between load and roll).
Symbol Description
μ
Brg
Coefficient of friction for the bearing friction
• Value can be entered directly or selected from the "Physical coefficients" table.
Bearing and leadscrew friction