Smooth Motor is specialized in high precision stepper motor and customized assembly for 30 years.
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Smooth Motor is specialized in high precision stepper motor and customized assembly for 30 years.
Straight to the topic: 8 steps in the application of stepper motor drive.
Straight to the topic: 8 steps in the application of stepper motor drive.
1. Set the automatic refueling parameter (set it smaller, such as adding oil once in 5 seconds) and observe whether the automatic refueling is correct. If it is correct, set the automatic refueling parameter to the actual required parameter.
2. Set the fine score of the stepper drive, usually the higher the fine score, the higher the control resolution. However, if the fine fraction is too high, the maximum feed speed will be affected. Generally speaking, for mold machine users can consider the pulse equivalent of 0.001mm/P(the maximum feed speed is 9600mm/min) or 0.0005mm/P(the maximum feed speed is 4800mm/min); For users with low accuracy requirements, the pulse equivalent can be set higher, such as 0.002mm/P(the maximum feed speed is 19200mm/min) or 0.005mm/P(the maximum feed speed is 48000mm/min). For the two-phase stepper motor, the pulse equivalent is calculated as follows: pulse equivalent = lead screw pitch ÷ fine fraction ÷200.
3. Uniaxial acceleration: used to describe the acceleration and deceleration ability of a single feed shaft, the unit is mm/second square. This index 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, etc. The larger this value is, the less time is spent in the acceleration and deceleration process during the movement, and the more efficient it is. Typically, this value is between 100 and 500 for stepper motors, and can be set between 400 and 1200 for servo motor systems. In the setting process, start setting small, run for a period of time, repeat various typical movements, pay attention to observe, if there is no abnormal situation, then gradually increase. If an abnormal situation is found, the value is reduced and the insurance margin of 50% to 100% is left.
4. Jump speed: This parameter corresponds to the jump frequency of the stepper motor. The so-called jump frequency is the highest frequency that stepper motor can start directly without acceleration. Reasonable selection of the parameters can improve the machining efficiency and avoid the low speed section of the stepper motor with bad motion characteristics. However, if this parameter is selected too large, it will cause congestion, so be sure to leave a margin. In the factory parameters of the motor, the take-off frequency parameters are generally included. However, after the machine is assembled, this value may change and generally decrease, especially when doing load movement. Therefore, the setting parameters are best in reference to the motor factory parameters, and then the actual measurement decision.
5. Curve acceleration: used to describe the acceleration and deceleration ability of multiple feed shafts, the unit is mm/second square. It determines the maximum speed of the machine tool in circular motion. The larger this value is, the greater is the maximum allowable speed of the machine tool in circular motion. Typically, for machine tools composed of stepper motor systems, this value is between 400 and 1000, and for servo motor systems, it can be set between 1000 and 5000. In the case of heavy-duty machine tools, the value is smaller. In the setting process, start setting small, run for a period of time, repeat various typical linkage movements, pay attention to observe, if there is no abnormal situation, and then gradually increase. If an abnormal situation is found, the value is reduced and the insurance margin of 50% to 100% is left. Usually considering the driving ability of stepping motor, the friction of mechanical assembly and the bearing capacity of mechanical parts, the maximum speed of each axis can be modified in the manufacturer's parameters to limit the maximum speed of the three axes when the machine tool user actually uses it.
6. Determine whether there is a lost pulse. You can use the intuitive method: point a point on the workpiece blank with a sharp knife, set the point as the working origin, raise the Z axis, and then set the Z axis coordinate to 0; Repeatedly make the machine tool movement, such as the empty knife run a typical processing program (preferably including three axis linkage), can be suspended or stopped in the processing, and then back to the origin of the workpiece, slowly descend the Z axis, see whether the tip and the point on the blank coincide. If there is any deviation, check the type of pulse signal received by the step driver and check whether there is any error between the terminal board and the driver indirect line. If the car is still suffocated or lost step, adjust the acceleration and other parameters according to 10, 11, 12 steps.
7. Check whether the set value of electronic gear and pulse equivalent matches. You can make a mark on any axis of the machine tool, set the coordinates of the point as the zero point in the software, and use direct input instructions, point or hand wheel to make the axis go a fixed distance. Use vernier caliper to measure the actual distance and the coordinates in the software to show whether the distance is attached.
8. According to the installation position of the three axis zero sensors, set the return mechanical origin parameters in the manufacturer's parameters. When the Settings are correct, you can run "Return to machine origin" in the "Operation" menu. If the movement direction is correct, continue to return; otherwise, stop. Reset the direction of return to the origin of the machine in the manufacturer's parameters until all axes can return to the origin of the machine.
The above are the 8 links that should be paid attention to in the application of stepper motor driver. Do you know how many?
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