A machine tool table is an X-axis with a special structure. The workbench motor is connected to a gearbox to drive the gear, and engages with the rack mounted on the bed to drive the table to move. 840d system, 611d drive, 1ft6 motor. During debugging, it was found that the x-axis displacement did not match the display, and the difference multiplier relationship showed large display and small actual displacement. Obviously, the axis parameters are not set properly. How do you set the axis parameters for this rack-driven machine? 31000--31080, especially how to set the screw pitch? How to calculate the numerator and denominator? Can you ensure that the displacement matches the display? The motor encoder does position feedback 2048 lines.
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A: You are right. The current movement and display do not match the main problem of pitch and reduction ratio.
Pitch (31030) = rack modulus X drive gear number X3.1415926.
The deceleration ratio numerator (31050) denominator (31060) depends on the transmission ratio of the servo motor to the drive wheel reduction gearbox.
If the encoder is mounted on a servo motor:
31070=1
31080=1
31020=2048