Delta RMC101 User Manual download pdf (Page 574)

100

101

RMC100 and RMCWin User Manual

6-30

inch. At the desired 0 position, the MDT produces 425 counts.

We first calculate the exact Scale:

With the exact Scale value, we must choose the Prescale Divisor and the rounded Scale value.

The highest divisor value we can use is 1; multiplying the scale by 2, 4, or 8 would all overflow the

Scale limits of ±32767. Therefore we have the following parameters:

Scale = 29879

Prescale Divisor = 1

Next, we must calculate the offset:

Example 2

A system has an MDT with a calibration number of 9.0108 ms per inch and 1 recirculation. The

desired position units are tenths of a millimeter. At the desired 0 position, the MDT produces 1122

counts.

We must first calculate the scale, but in order to do that we need to know how many position units

there are in an inch:

So, we now calculate the exact Scale:

With the exact Scale value, we must choose the Prescale Divisor and the rounded Scale value.

The highest divisor value we can use is 4; multiplying the scale by 8 would overflow the Scale

limits of ±32767. Multiplying the exact scale by this divisor value and rounding gives us the

following parameters:

Scale = 30789

Prescale Divisor = 4

Next, we must calculate the offset:

Example 3

A system has an MDT with a calibration number of 8.9772 ms per inch and 8 recirculations. The

desired position units are thousandths of an inch. Therefore, there are a thousand position units

per inch. At the desired 0 position, the MDT produces 28226 counts.

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