Guide Bushing Spindle Synchronization; Outline; Detailed Explanation; Operation Of G/B Spindle Synchronization - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (2/2)
13 Spindle Control

13.12 Guide Bushing Spindle Synchronization

13.12 Guide Bushing Spindle Synchronization

13.12.1 Outline

This function is for a machine with a spindle motor to rotate a guide bushing: This function allows the guide bushing spindle
motor (hereinafter called G/B spindle) to synchronize with a reference spindle motor (hereinafter called reference spindle).
Spindle motors that are controlled by the spindle drive unit are required (for both reference and G/B spindles) in order to use
this function.
Bar feeder
 Designate a reference spindle and a G/B spindle using the parameter "#3074 GBsp".
 When the ladder turns ON the "G/B spindle synchronization valid" (GBON) signal, the reference spindle and the G/B spin-
dle enter the spindle synchronization state.
The operation error (M01 1014) occurs if the spindle forward/reverse run start command, orientation command, or C axis
servo ON command is issued with the "G/B spindle synchronization valid" (GBON) signal OFF. Turn the "G/B spindle syn-
chronization: temporary cancel" (GBOFF) signal ON in order to control independently each of the reference spindle and the
G/B spindle.
 The reference spindle and the G/B spindle accelerate/decelerate synchronizing.
 The operations according to the combination of reference spindle and G/B spindle are as below:
Spindle connection Available
Reference spindle Spindle-mode servo
(#3074 GBsp=1)
Analog connection N/A (*2)
(*1) The operation error (M01 1015) occurs when the G/B spindle synchronization signal (GBON: Y778) turns ON.
(*2) The MCP alarm (Y05 3025) occurs at power ON.
 To set the gear ratio to the reference spindle or G/B spindle, specify them into the parameter "#13057 SP057 GRA1" and
"#13061 SP061 GRB1".

13.12.2 Detailed Explanation

13.12.2.1 Operation of G/B Spindle Synchronization

How to Command
 Turn the "G/B spindle synchronization valid" (GBON) signal ON using the ladder.
The reference spindle and the G/B spindle enter the spindle synchronization state at the position where the "G/B spindle
synchronization valid" (GBON) signal is turned ON, then the "G/B spindle synchronizing mode" (GBMOD) signal and the
"G/B spindle synchronization: position control synchronizing" (GBSYN) signal turn ON.
 When the Forward run/reverse run start signal of the reference spindle is turned ON, the reference spindle and the G/B
spindle accelerate/decelerate to the commanded rotation speed following the spindle synchronization acceleration/deceler-
ation time constant, multi-step acceleration/deceleration changing speed and time constant scale set in the parameters
with keeping the synchronous state.
(The multi-step acceleration/deceleration speed to be used is of the spindle whose acceleration calculated from the limit
rotation speed and spindle synchronization acceleration/deceleration time constant.)
 When the command speed for the reference spindle is changed, acceleration/deceleration is carried out with the reference
spindle and the G/B spindle synchronizing even when stopping the reference spindle.
IB-1501668-B
Collet chuck
(Reference spindle)
Spindle connection
N/A (*1)
connection
Guide bushing
(G/B spindle)
G/B spindle (#3074 GBsp=2)
Spindle-mode servo
connection
N/A (*1)
N/A (*1)
N/A (*2)
538
Analog connection
N/A (*2)
N/A (*2)
N/A (*2)