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发表于 2019-6-20 13:59:10
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有两个限制因素。
反馈解决方案
2.静摩擦
可以在1秒内移动1微米,但和并不意味着整秒的速度恒定为每秒1微米。必须有一种方法来控制1秒内所有毫秒的速度。如果每毫秒更新一次反馈,这是不可能的。
这与我对步进气缸的论点相同。可以在500毫秒内移动5微米,但这并不意味着运动是每秒10微米的常数。
我不明白移动微米的有趣之处。机器无法达到这种公差。尺寸将随温度和压力而变化。
There are two limiting factors.
1. feedback resolution.
2. static friction
It is possible to move 1 micron in 1 second but that doesn’t mean the velocity is a constant 1 micron per second for the whole second. There must be a way to control the velocity in all the milliseconds during the 1 second. This is impossible with out feedback that updates every millisecond.
This is the same argument I made against the stepper cylinder. It is possible to move 5 microns in 500 milliseconds but that doesn’t mean the motion is a constant 10 microns per second.
I don’t understand the interesting in moving microns. The machines can not be built to that tolerance. The dimensions will change with temperature and stress.
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