Emerson FM-3 - Manual (Page 220)

206
FM-3 Programming Module Reference Manual
selects three digits allowing resolution of 0.001 Inches on all distance variables. Use the
spinner window Up/down buttons.
Distance Units Scaling – Enter the number of User Units the motor/load travels for each
revolution of the motor. You must enter the numerator and the denominator for this scaling
factor, but for this example, the denominator (bottom portion of the ratio) is at 1.
Position View
The example wishes to limit the Following Error to 0.25 Inches or one motor revolution, and
the Software Travel Limits of +20 and 0 Inches.
To setup following error limit and software travel limits, fill out the following parameters in
the Limits Group:
Enable Following Error – Enable this checkbox.
Following Error Limit – The example uses a limit of 0.25 Inches.
Enable Software Travel Limits – Enable this checkbox.
Software Travel Limit + and - - If the position feedback ever exceeds these values when
traveling in a positive or negative direction, the motor will come to a stop at the Travel Limit
Decel rate defined on the Ramps view
Tuning View
This example application has an inertia mismatch of 3.5:1 and has been entered as seen in
Figure 87.
Figure 87: Tuning View