How to rotate the spindle of a double-spindle CNC lathe

I. Preparations Before Operation

Check the system status ‌ : ensure that the machine tool is in non-processing mode and the tool has completely stopped running.

Check the permission Settings ‌ : For some models of equipment, a three-level protection password needs to be entered to enable the shaft control permission transfer function.

Ⅱ. Step-by-step operation process

enter the channel parameter interface ‌ :

Press the [Channel Switch] key on the main interface of the SINUMERIK system.

Use the arrow keys to select the target channel to be switched (such as switching from Channel 1 to Channel 2).

set the axis allocation rule ‌ :

Find the NCU/Channel Axis Assignment group in the parameter tree.

Mark "=0" after the axis number of the original channel to remove control.

Change the axis number corresponding to the target channel to "=1" to activate the control.

performs hot-swapping ‌ :

Press the dual-channel synchronization button on the operation panel and hold it for 3 seconds.

Observe the real-time position synchronization status of the axis coordinate system to ensure that the servo drive units of the two groups of channels complete the data handshake.

Ⅲ. Verification after switching

enter the test instruction ‌ :

Enter the test command in MDI mode (such as G01 X100 F500).

Verify whether the two channels respond normally through the trajectory preview function.

pay attention to the mechanical zero point ‌ :

Special attention should be paid to the offset compensation of the mechanical zero point.

Some models equipped with dual grating rulers will automatically correct position deviations.

Iv. Precautions

system delay ‌ :

During the switching process, the two-way communication delay of the system is controlled within 3 milliseconds to ensure processing accuracy.

It is recommended to use an oscilloscope to detect the synchronous pulse waveforms of signals in each channel every six months to prevent the jitter problem during shaft switching caused by the aging of electronic components.

operating safety ‌ :

Before operation, make sure the system is in non-processing mode and the tool has completely stopped running.

Check the channel switching permission Settings of the numerical control system. For some models of equipment, a three-level protection password needs to be entered to enable the axis control permission transfer function.