English Author: Site Editor Publish Time: 2025-12-26 Origin: Site
I. Wide Number System
electronic lock control :
M157 : Lock the tailstock to ensure it remains stationary during processing.
M156 : Unlock the tailseat and allow it to move freely.
typical operating procedures :
First enter M157 to lock the tailstock;
Then use G00 Z100 to position the tailseat;
After processing is completed, enter M156 to unlock;
Finally, use G00 Z50 to return to the original position.
II. FANUC system
hydraulic tailstock control :
M78 : The tailstock moves forward, and the hydraulic system pushes the sleeve out to support the workpiece.
M79 : the tailstock reels and the sleeve reels to its original position.
precautions for operation :
A pause instruction should be added in the program, such as M78 G04 X2.0, to ensure that the sleeve is fully in place before processing and to prevent the workpiece from shifting.
The hydraulic pressure parameter should be set between 2.0-4.0MPG. If the pressure is too low, the action will be slow; if it is too high, the sealing parts may be damaged.
The sleeve stroke generally does not exceed 200mm. Overstroke may damage the machine tool.
III. Other systems
special model control :
Some models may use commands such as M55 and M56. Please refer to the machine tool manual for details.
Ⅳ. PLC control
hydraulic tailstock control :
The clamping/releasing of the chuck, the extension/retraction of the tailstock, the high-speed/low-speed gear of the spindle and the braking of the spindle are controlled by the PLC output signals (such as Q1.0~Q1.7).
For example, Q1.0 to Q1.7 controls the on/off of the 24V dc solenoid valve to achieve the extension/retraction of the tailstock.
V. Operational suggestions
System differences : The tailstock control codes of different brands (such as Guangshu, FANUC) may vary. Be sure to refer to the machine tool manual.
Parameter Settings : Parameters such as hydraulic pressure and sleeve stroke should be set in accordance with the specifications to prevent equipment damage.
Program debugging : It is recommended to test the tailstock action under no-load conditions and confirm that there are no errors before proceeding with actual processing.
