Synchronized spindles (G30, G77S, G78S). Fagor CNC 8055 para otras aplicaciones, CNC 8055 for lathes, CNC 8055 para tornos, CNC 8055 for other applications

Programming manual

5.5

Synchronized spindles (G30, G77S, G78S)

With function G77S, two spindles (main and secondary) may be synchronized in speed; this synchronism may be cancelled with function G78S. Always program G77S and G78S because functions G77, G78 to slave and unslave the axes.

When the spindles are synchronized in speed, the second one turns at the same speed as the main spindle.

Function G77S may be executed at any time, open loop (M3, M4) or closed loop (M19), the spindles may even have different ranges (gears).

General output "SYNSPEED (M5560)" will be high while the spindle are in synch (same speed).

When this synchronism is cancelled (G78S), the second spindle recovers its previous speed and status (M3, M4, M5, M19) and the main spindle stays in the current status.

If while in synchronism, an S is programmed greater than the maximum allowed, the CNC applies the maximum value while they are synchronized. When canceling this synchronism, the limit is no longer applied and the main spindle assumes the programmed speed.

While the spindles are synchronized in speed, function G77S active, with G30 they may also be synchronized in position and set an angular offset between them so the second spindle follows the main spindle at this set offset distance.

Programming format: G30 D ±359.9999 (offset in degrees)

For example, with G30 D90 the second spindle will turn 90º behind the main spindle.

Some points to consider:

Before activating the synchronism, both spindles must be homed (referenced).

The spindles cannot be synchronized if the XC or ZC (C axis) plane is selected.

To synchronized the spindles in position (G30) they must be synchronized in speed already (G77S).

To synchronize two spindles, the SERVOSON and SERVOSO2 signals must be activated already.

While the spindles are synchronized, only the signals of the main spindle will be attended to

PLCCNTL, SPDLINH, SPDLREV, etc. On the other hand, when making a thread, only the feedback and reference pulses of the main spindle will be taken into account.

While the spindle synchronism is active, it is possible to:

• Execute functions G94, G95, G96, G97, M3, M4, M5, M19 S***.

• Change the spindle speed via DNC, PLC or CNC (S).

• Change the spindle speed override via DNC, PLC, CNC or keyboard.

• Change the spindle speed limit via DNC, PLC or CNC (G92 S)

But the following cannot be done:

• Toggle the spindles: G28, G29.

• Change gears: M41, M42, M43, M44.

• Define the XC or ZC plane in "C" axis mode.

5.

CNC 8055

CNC 8055i

·T· M ODEL

S OFT : V01.6

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