Stepper motor lose step phenomenon
Many people have said that the step motor, the mechanical reasons there are many:such as wire rod bearing is not installed, the screw rod guide rail wear, wear and so on can let the machine are not allowed to go, and the original switch is good or bad,will directly influence the precision of.
I had to write their own procedures appear for the phenomenon, perhaps your technology, is processed, program can sometimes run processing procedures and in situ, back to the origin of program not connected. This directly caused by theaccumulated error, then by monitoring the long time to find the problem. This situationoccurred in the Zhuo distributed indexing machine. See the forum where many speakthe accumulative errors, I think a lot of that when I met things.
Stepper motor is generally can reach 600, in fact, is not up to the speed,manufacturers say that is 600 rpm, 500 rpm is good to use in the process of. In general, the machine can to 500 rpm, actually is also very fast. Then quickly may stall,motor like card dead ring, which is the speed is too high, the motor turn not to come.The occurrence of this phenomenon, the solution is:
1, reduce the maximum operating frequency;
2, high acceleration and deceleration time;
3, to reduce the frequency of start;
4, the fine fractions are rounded up a gear.
Stepper motor speed and torque is inversely proportional to the speed, faster, smaller torque. Of course, this is very important in the selection of the time, do not pull carts in the small ma. Selection of high point never mind, small or just is not out of step motor,mostly small, heavy machinery, resulting in small Mara crane phenomenon.
In general, stepper motor drive signal pulse for 24V series 2K resistance. General manufacturers recommend resistance is 1.8K ~ 2K. In fact, I by measuring theresistance, 2K, pulse voltage is only 2.2V. I have chosen the 1.5K resistance. The problem is I through practice, but also has a motor to go is not smooth, find a lot of places are not found, then a change of resistance is good. In general, optocouplercan bear 24V, especially when there is no resistance, can be used directly. Of course,a resistor is better.
Stepping motor because if the load is too large, due to inertia, this situation is gone.
Dynamic instructions are not allowed to go, especially to move back to the origin, that is completely mistaken. The stop point is a complete 90 degree angle, start stopequivalent to slam the brakes, think also not stop. So back to the origin of certain or to use back to the origin of instruction.
The motor current is not transferred to the rated current, generally small stalls, rated 6A, adjusted to 5.5A it. This time the torque force is enough, the temperature is not high. Stepper motor that can reach 80 degrees, but the temperature is too high, orthe effect of magnetic field.
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