Drive mechanism selection: Difference between revisions

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A drive mechanism is the part of a machine that, through power provided by a motor, performs the intended task of a machine. It can for example be a belt moving a box or a ball screw lifting or lowering heavy equipment.  
A drive mechanism is the part of a machine that, through power provided by a motor, performs the intended task of a machine. It can for example be a belt moving a box or a ball screw lifting or lowering heavy equipment.


{| class="wikitable"
Use the table below to identify the type of drive mechanism that is the most suited for your intended application.
! Application factors !! Belt drives !! Chain drives !! Rack/Gear and pinion !! Roller Pinon/rack !! Leadscrews !! Ballscrews !! Linear Motors
 
|-
{| class="wikitable" style="text-align:center; vertical-align:middle;"
| '''Accuracy''' || Low  || Low  || Low-High || High || Low  || Low-High || High
|- style="font-weight:bold;"
|-
! style="vertical-align:bottom; font-weight:normal; text-align:left;" |
| '''Backlash/Vibration''' || A consideration || A consideration || A consideration || Near Zero || A consideration || A consideration || Near Zero
! style="background-color:#D9D9D9;" | Belt drives
|-
! style="background-color:#D9D9D9;" | Chain drives
| '''Acceleration''' || Medium || Low  || High || High || Low  || Medium || High
! style="background-color:#D9D9D9;" | Rack/Gear and   pinion
|-
! style="background-color:#D9D9D9;" | Roller   Pinon/rack
| '''Speed''' || Medium || Low  || Medium || High || Low  || Medium || High
! style="background-color:#D9D9D9;" | Leadscrews
|-
! style="background-color:#D9D9D9;" | Ballscrews
| '''Load capacity''' || Low  || Medium || High || High || Low  || High || Low
! style="background-color:#D9D9D9;" | Linear Motors
|-
|-
| '''Length''' || Shorter || Shorter || Long || Long || Shorter || Shorter || Moderate
| style="text-align:right; font-weight:bold; background-color:#D9D9D9;" | Accuracy
| style="background-color:#DA9694;" | Low
| style="background-color:#DA9694;" | Low
| Low-High
| style="background-color:#A8E0B1;" | High
| style="background-color:#DA9694;" | Low
| Low-High
| style="background-color:#A8E0B1;" | High
|- style="background-color:#FEFEA4;"
| style="text-align:right; font-weight:bold; background-color:#D9D9D9;" | Backlash/Vibration
| A  consideration
| A  consideration
| A  consideration
| style="background-color:#A8E0B1;" | Near  Zero
| A  consideration
| A  consideration
| style="background-color:#A8E0B1;" | Near  Zero
|- style="background-color:#A8E0B1;"
| style="text-align:right; font-weight:bold; background-color:#D9D9D9;" | Acceleration
| style="background-color:#FEFEA4;" | Medium
| style="background-color:#DA9694;" | Low
| High
| High
| style="background-color:#DA9694;" | Low
| style="background-color:#FEFEA4;" | Medium
| High
|- style="background-color:#FEFEA4;"
| style="text-align:right; font-weight:bold; background-color:#D9D9D9;" | Speed
| Medium
| style="background-color:#DA9694;" | Low
| Medium
| style="background-color:#A8E0B1;" | High
| style="background-color:#DA9694;" | Low
| Medium
| style="background-color:#A8E0B1;" | High
|- style="background-color:#A8E0B1;"
| style="text-align:right; font-weight:bold; background-color:#D9D9D9;" | Load capacity
| style="background-color:#DA9694;" | Low
| style="background-color:#FEFEA4;" | Medium
| High
| High
| style="background-color:#DA9694;" | Low
| High
| style="background-color:#DA9694;" | Low
|-
|-
| '''High wear and short life''' || A consideration || A consideration || A consideration || Long life || A consideration || A consideration || Long life
| style="text-align:right; font-weight:bold; background-color:#D9D9D9;" | Length
|-
| Shorter
| '''Maintenance''' || A consideration || A consideration || A consideration || Low to none || A consideration || A consideration || Low to none
| Shorter
|-
| Long
| '''Noise level''' || Medium || High || Medium || Low || High || Medium || Low  
| Long
|-
| Shorter
| '''Dust and dirt emissions''' || High || High || Moderate || Low to none || Moderate || Moderate || Low to none
| Shorter
| Moderate
|- style="background-color:#FEFEA4;"
| style="text-align:right; font-weight:bold; background-color:#D9D9D9;" | High wear and short life
| A   consideration
| A   consideration
| A   consideration
| style="background-color:#A8E0B1;" | Long   life
| A   consideration
| A   consideration
| style="background-color:#A8E0B1;" | Long   life
|- style="background-color:#FEFEA4;"
| style="text-align:right; font-weight:bold; background-color:#D9D9D9;" | Maintenance
| A   consideration
| A   consideration
| A   consideration
| style="background-color:#A8E0B1;" | Low   to none
| A   consideration
| A   consideration
| style="background-color:#A8E0B1;" | Low   to none
|- style="background-color:#FEFEA4;"
| style="text-align:right; font-weight:bold; background-color:#D9D9D9;" | Noise level
| Medium
| style="background-color:#DA9694;" | High
| Medium
| style="background-color:#A8E0B1;" | Low
| style="background-color:#DA9694;" | High
| Medium
| style="background-color:#A8E0B1;" | Low
|- style="background-color:#FEFEA4;"
| style="text-align:right; font-weight:bold; background-color:#D9D9D9;" | Dust and dirt emissions
| style="background-color:#DA9694;" | High
| style="background-color:#DA9694;" | High
| Moderate
| style="background-color:#A8E0B1;" | Low   to none
| Moderate
| Moderate
| style="background-color:#A8E0B1;" | Low   to none
|}
|}
=See also=
[[Guide to machine design]]

Latest revision as of 20:05, 18 February 2023

A drive mechanism is the part of a machine that, through power provided by a motor, performs the intended task of a machine. It can for example be a belt moving a box or a ball screw lifting or lowering heavy equipment.

Use the table below to identify the type of drive mechanism that is the most suited for your intended application.

Belt drives Chain drives Rack/Gear and pinion Roller Pinon/rack Leadscrews Ballscrews Linear Motors
Accuracy Low Low Low-High High Low Low-High High
Backlash/Vibration A consideration A consideration A consideration Near Zero A consideration A consideration Near Zero
Acceleration Medium Low High High Low Medium High
Speed Medium Low Medium High Low Medium High
Load capacity Low Medium High High Low High Low
Length Shorter Shorter Long Long Shorter Shorter Moderate
High wear and short life A consideration A consideration A consideration Long life A consideration A consideration Long life
Maintenance A consideration A consideration A consideration Low to none A consideration A consideration Low to none
Noise level Medium High Medium Low High Medium Low
Dust and dirt emissions High High Moderate Low to none Moderate Moderate Low to none

See also

Guide to machine design

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