Mitsubishi Electric M80V Series Manual page 506

M800V/M80V Series PLC Interface Manual
4 Explanation of Interface Signals
4.3 PLC Output Signals (Bit Type: Y***)
Cont. Signal name
A Spindle orientation
[Function]
This signal is used to run the spindle motor at low speed when executing mechanical orientation(*1) during spindle control.
<Supplement>
Since most spindle drive/control units recently marketed are equipped with spindle orientation function, this signal
(SORCn) is rarely used for mechanical orientation. This signal (SORCn) is used for application such as rotating the
spindle by constant rotation speed.
(*1) The mechanical orientation is assumed to be in the form of orientation by performing the following operations.
(1) Rotate the spindle at low speed.
(2) It detects when the spindle has reached the area where such as proximity switch is used and then stops the spindle.
The spindle coasts to some extent and stops.
(3) The position (the orientation position) is determined by hitting the pin against the spindle under the status of (2).
[Operation]
When the "Spindle orientation" signal (SORCn) is turned ON, the spindle can be rotated at the rotation speed set with the
parameter in advance. Note that, to turn this signal (SORCn) ON, the "Spindle stop" signal (SSTPn) must be turned ON in
advance.
At the same time as this signal (SORCn), the forward run signal or the reverse run signal is required.
The table below shows the relationship between the oriented spindle speed and the "Spindle gear selection code m"
(GImn).
Spindle gear selection code
Gear stage
GI2n
1
2
3
4
Spindle speed data while the "Spindle orientation" signal (SORCn) is ON can be calculated by the following formula.
For example, when the "Spindle gear selection code m" (GImn) has a combination of "0" for "GI2n" and "1" for "GI1n", the
spindle rotation speed data is as follows:
Orientation spindle speed data
(Motor rotation speed)
Actual spindle rotation speed is as follows: Spindle command final data (SBINn) = SORI / Slimt2 × 4095
When the spindle command final data (SBINn) is "4095", the rotation speed of the motor becomes maximum.
Abbrev. 1stSP
SORC Y1896
Orientation spindle speed
GI1n
0 0
0 1
1 0
1 1
SORI
= ×
Slimt2
2ndSP 3rdSP 4thSP
Y18F6 Y1956 Y19B6
SORI
Maximum motor rotation speed
493
5thSP 6thSP 7thSP 8thSP
Y1A16 Y1A76 Y1AD6 Y1B36
Spindle speed limit
Slimt1
Slimt2
Slimt3
Slimt4
IB-1501616-D