Servo motor | Why can not put the origin of the middle to put the limit at the negative side!?!?
Origin are generally placed next to the limit in the negative, almost no one put the middle, is why!?
Servo motors in the past to find the origin, only to find a direction.
If the motor stop position is at the origin of the positive direction, negative direction to find no problem.
However, if the motor stop position is at the origin of the negative direction,
To find the origin or to the negative direction, it will hit the limit.
Although the servo drive has been to find the origin, the encounter limit, will go the opposite direction to find the origin of the function.
However, the relative waste of time will be longer.
People may say, I recorded the coordinates, if it is at the origin of the positive, negative to go aboard,
If it is at the origin of the negative, go out walking.
The question is: first to the positive or the negative go!? For motor after the positive or negative to!?
2011年8月19日 星期五
Servo motor | highest pulse number, related to the maximum speed
Servo motor | highest pulse number, related to the maximum speed
To pulse control servo motors, in addition to the electronic gear ratio to take into account,
There is also maximum speed considerations.
Some can receive 200kpps, 500kpps What's the difference!?
200kpps = 200k per second, a pulse / sec
A pulse of 1um, the
1 seconds to go 200000um = 200mm
1 minute = 200mm/sx60 seconds = 12000mm/min = 12 m / min
500kpps = 500k per second, a pulse / sec
A pulse of 1um, the
1 seconds to go 500000um = 500mm
1 minute = 500mm/sx60 seconds = 30000mm/min = 30 m / min
From the above calculation that, in setting the electronic gear ratio,
Also need to take into account the maximum pulse number, as it will affect the speed.
If you do not need to um-level accuracy, the electronic gear can be relaxed,
Speed can also be demanding.
There is also maximum speed considerations.
Some can receive 200kpps, 500kpps What's the difference!?
200kpps = 200k per second, a pulse / sec
A pulse of 1um, the
1 seconds to go 200000um = 200mm
1 minute = 200mm/sx60 seconds = 12000mm/min = 12 m / min
500kpps = 500k per second, a pulse / sec
A pulse of 1um, the
1 seconds to go 500000um = 500mm
1 minute = 500mm/sx60 seconds = 30000mm/min = 30 m / min
From the above calculation that, in setting the electronic gear ratio,
Also need to take into account the maximum pulse number, as it will affect the speed.
If you do not need to um-level accuracy, the electronic gear can be relaxed,
Speed can also be demanding.
PLC | contact input selection? A Contact (NO), B (NC)
PLC | contact input selection? A Contact (NO), B (NC)
A contact (NO), B contacts (NC), the use of that too!?
Generally not often encountered in the switch, but important, such as emergency EMS, the limit to protect the switch.
Will use the B contact.
So the signal remains live. If the line cut off, will know immediately.
Also coupled with a line check function.
Other detector signal, the A contact can be used.
========================
Some special cases:
Such as the minimum level detector,
Because the level is usually more than the lower limit position, it will always know to check.
If we use B contact, but no signal has been lost protection.
So the use of contact A, so that in the normal level, the lower limit, or has been output.
A contact (NO), B contacts (NC), the use of that too!?
Generally not often encountered in the switch, but important, such as emergency EMS, the limit to protect the switch.
Will use the B contact.
So the signal remains live. If the line cut off, will know immediately.
Also coupled with a line check function.
Other detector signal, the A contact can be used.
========================
Some special cases:
Such as the minimum level detector,
Because the level is usually more than the lower limit position, it will always know to check.
If we use B contact, but no signal has been lost protection.
So the use of contact A, so that in the normal level, the lower limit, or has been output.
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