Microtrac™
Document: UMDB007595.docm
Revision: B13
Created by: KB
Date: 17 Nov 2019
IPN: 3042830-B13
Source Location: C:\ePDM\ISLEng\products\db-microtracs4000\manuals\UMDB007595.docm
Page 8 of 26
User Ma
nual
The above diagram details the speed and loading specifications of the standard and high-torque
Microtracs
™. There are four regions defining performance:
•
Continuous Duty:
Preferred operating region.
•
Short Term Operation:
Operation permitted for several minutes.
•
Intermittent:
Surge loading allowable for a few seconds at a time.
•
Stalled / Jammed Condition:
Automatic limiting is engaged to protect the motor and gearing.
Do not operate the track in the stalled or jammed condition.
Influences on Loading
For a typical tracked vehicle there are multiple factors that can increase load and diminish track
performance. These include the following and are detailed below:
•
Additional Payload
•
Inclines
•
Effects of Differential Steering (skid steering with parallel tracks)
•
Curved Geometry of a pipe
•
Elevated Temperature / Poor Heat Sinking / Thermal Shut-Down
Additional Payload
Additional Payload
may be added to the track, but the expected pull performance must be de-rated as
per the calculation below. Additional payload also affects differential steering, inclines and curved pipe
geometry (see below).
Pull Reduction = 0.25 x Extra Weight
Inclines
Inclines
cause the track to lift the vehicle weight against gravity and increase the track pulling load.
Calculate the incline load using the equation below. Magnetic downforce does not affect loading from
inclines
— only forces from gravity. Note that the constant load from gravity becomes a significant factor
on vertical surfaces because the motor is working to resist the load even when the track is stopped.
