1. Set the number of subdivisions of the stepper motor driver. Generally, the higher the number of subdivisions, the higher the control resolution. However, if the number of subdivisions is too high, it will affect the maximum feed rate. In general, the user of the mold machine can consider the pulse equivalent of 0.001mm / P (the maximum feed rate is 9600mm / min at this time) or 0.0005mm / P (the maximum feed rate is 4800mm / min); for accuracy requirements For users who are not high, the pulse equivalent can be set larger, such as 0.002mm/P (the maximum feed rate is 19200mm/min at this time) or 0.005mm/P (the maximum feed rate is 48000mm/min at this time). For a two-phase stepper motor, the pulse equivalent calculation method is as follows: pulse equivalent = screw pitch ÷ subdivision number ÷ 200.
2. Take-off speed: This parameter corresponds to the take-off frequency of the stepper motor. The so-called take-off frequency is the highest frequency at which the stepper motor can start work without acceleration. Reasonable selection of this parameter can improve the processing efficiency, and can avoid the low-speed segment where the stepper motor has poor motion characteristics; however, if the parameter is selected to be large, it will cause a boring car, so it is necessary to leave a margin. In the factory parameters of the motor, the take-off frequency parameter is generally included. However, after the machine is assembled, the value may change and generally decrease, especially when doing load motion. Therefore, the setting parameter is preferably determined after referring to the factory parameters of the motor.
3. Uniaxial acceleration: used to describe the acceleration and deceleration of a single feed axis in millimeters per second squared. This indicator is determined by the physical characteristics of the machine tool, such as the mass of the moving part, the torque of the feed motor, the resistance, the cutting load, and so on. The larger the value, the smaller the time spent during acceleration and deceleration during exercise and the higher the efficiency. Usually, for stepper motors, this value is between 100 and 500. For servo motor systems, it can be set between 400 and 1200. In the setting process, start setting a little smaller, run for a period of time, repeat the various typical movements, pay attention to observation, and if there is no abnormal situation, then gradually increase. If an abnormal condition is found, lower the value and leave a 50%~100% insurance margin.
4. Curved acceleration: used to describe the acceleration and deceleration capability when multiple feed axes are linked, in millimeters per second squared. It determines the maximum speed of the machine when it is doing circular motion. The larger the value, the greater the maximum allowable speed of the machine when doing circular motion. Generally, for a machine composed of a stepper motor system, the value is between 400 and 1000, and for a servo motor system, it can be set between 1000 and 5000. If it is a heavy machine, the value is smaller. In the setting process, start setting a little smaller, run for a period of time, repeat the various typical linkage movements, pay attention to observation, and if there is no abnormal situation, then gradually increase. If an abnormal condition is found, lower the value and leave a 50%~100% insurance margin.
Usually considering the driving ability of the stepping motor, the friction of the mechanical assembly, and the bearing capacity of the mechanical components, the maximum speed of each axis can be modified in the manufacturer parameters, and the maximum speed of the three axes when the machine tool user actually uses is limited.
5. Set the return mechanical origin parameter in the manufacturer parameter according to the installation position of the three axis zero point sensor. When the settings are correct, you can run Back to Machine Origin in the Actions menu. First single axis return, if the direction of motion is correct, continue to return, otherwise you need to stop, reset the direction of the machine origin in the manufacturer parameters, until all axes can return to the machine origin.
6. Set the automatic fueling parameters (set smaller, such as 5 seconds plus oil), observe whether the automatic fueling is correct, if it is correct, set the automatic fueling parameters to the actual required parameters.
7. Check if the set values ​​of the electronic gear and pulse equivalent match. You can mark it on any axis of the machine tool, set the coordinates of the point to the working zero point in the software, and use the direct input command, jog or handwheel to make the axis travel a fixed distance, and measure the actual distance with the vernier caliper. Whether it is attached to the coordinate display distance in the software.
8. Determine the presence or absence of a pulse. You can use an intuitive method: use a sharp knife to point a point on the workpiece blank, set the point as the working origin, raise the Z axis, and then set the Z axis coordinate to 0; repeatedly make the machine move, such as empty knife run A typical machining program (preferably with three-axis linkage) can be paused or stopped during machining, then returned to the workpiece origin, slowly descending the Z-axis to see if the tool tip matches the point on the blank. If there is any deviation, please check the type of pulse signal received by the stepper driver and check if the wiring between the terminal board and the driver is incorrect. If there is still a boring or lost step, adjust the acceleration and other parameters in steps 10, 11, and 12.
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