Mitsubishi Electronics MR-J2S- A 131072 65536, 1125, Instructions for reduction, 65536 32768

5. PARAMETERS

(b)Conveyor setting example

For rotation in increments of 0.01 per pulse Machine specifications

Table : 360 /rev

Reduction ratio: n 4/64

Servo motor resolution: Pt 131072 [pulses/rev]

Servo motor 131072 [pulse/rev]

Table

Timing belt : 4/64

CMX	Pt	0.01	131072	65536	(5.1)
CDV			4/64 360	1125

Since CMX is not within the setting range in this status, it must be reduced to the lowest term. When CMX has been reduced to a value within the setting range, round off the value to the nearest unit.

CMX 65536 26214.4 26214

CDV 1125 450 450

Hence, set 26214 to CMX and 450 to CDV.

POINT

For unlimited one-way rotation, e.g. an index table, indexing positions will be missed due to cumulative error produced by rounding off.

For example, entering a command of 36000 pulses in the above example causes the table to rotate only:

36000	26214	1	4	360	359.995
	450	131072	64

Therefore, indexing cannot be done in the same position on the table.

(2)Instructions for reduction

The calculated value before reduction must be as near as possible to the calculated value after reduction.

In the case of (1), (b) in this section, an error will be smaller if reduction is made to provide no fraction for CDV. The fraction of Expression (5.1) before reduction is calculated as follows.

CMX	65536	58.25422	(5.2)
CDV	1125

The result of reduction to provide no fraction for CMX is as follows.

CMX	65536	32768	32768	58.20249	(5.3)
CDV	1125	562.5	563

The result of reduction to provide no fraction for CDV is as follows.

CMX	65536	26214.4	26214	58.25333	(5.4)
CDV	1125	450	450

As a result, it is understood that the value nearer to the calculation result of Expression (5.2) is the result of Expression (5.4). Accordingly, the set values of (1), (b) in this section are CMX26214, CDV450.

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