Workpiece Confirmation Process

Last crawled date: 6 months, 1 week ago

Application Overview

Purpose:
Detects passing components or assemblies on a conveyor.

Target workpiece:
Sheet metal case.
Pallet
Workpiece size: 270 x 305 x 50

Design Specifications:
Operating Conditions or Design Requirements
Conveyor guide width: 345
External dims.: W475 x D1350 x H159
Required Performance
Workpiece・Case weight: 8kg
Selection Criteria for Main Components
Motor roller
The integrated motor saves space by not requiring an external motor.

Design Evaluation:
Verification of main components
Verify that the motorized roller can move the material on the conveyor.
Motor roller selection
① Required tangential force (Roller transfer ability) confirmation
Conveyed object weight M = 8kg
When rolling friction coefficient μ = 0.04,
Required tangential force F[N] = 9.8 × M × μ = 9.8 × 8 × 0.04 = 3.14N
② Temporary selection of model number
MOR38-400-10
③ Determining required number of rollers
When motor roller's starting tangential force FK = 37.3N,
Conveyance capacity FH[N] = FK × 0.9 = 37.3 × 0.9 = 33.57N
Required number of rollers
n = F / FH = 3.14 / 33.57 = 0.094pc. (* 1pc. is capable of conveyance)
● For safety reasons, be sure that load always rides on two rollers.
④ Determining roller length
From Load: Length (L = 400) x Width (W = 320), roller length 400 (80mm margin) is selected.

Other Design Consideration:
One roller is adequate as shown in the calculations above, but considering that if there are any changes in the system with the load on the rollers, rollers come out of alignment, variation in the motor speed, and etc... minimum of two rollers need to engage each assembly tray component.

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