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A20B-8100-0130

A20B-8100-0130

发布时间:2019-01-15 09:32:24点击率:

所属行业:五金工业品-> 电子电工-> 电子材料
价格:¥2000
规格:A20B-8100-0130
供货总量:1

A20B-8100-0130

A20B-8100-0130

A20B-8100-0130

A20B-8100-0130

A20B-8100-0130

在计算指令脉冲数时,在浮点数的结果后面+0.5,再取整,以上文中的程序为例:

MMTargetX=10;           //横向运行距离10mm

《联系人;欧先生》
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PulseTargetX=(long)(MMTargetX*ValueX+0.5);//得到运行脉冲数

YK_start_s_move(XAxisNum,PulseTargetX);  //发指令让X轴正向运行

在计算指令脉冲数时采用了此方法可以减小取整误差带来的干扰,但是并不能消除,这是针对无法进行上述两种方法时的折衷办法。不过由于简单易行,推荐给软件工程师在计算脉冲数时使用。


第三节换向时个脉冲的运动方向误差

在试机的过程中出现过这样的问题:当使用某一品牌的驱动器,运行就非常准确;而换用另一品牌的驱动器,走一些固定的动作时就会越走越偏。而容易走偏的驱动器换了另一家的控制器,就又好了。

问题的原因出现在方向信号提前不足。

当前大部分驱动器是按周期扫描锁存方向信号,当捕捉到PULSE的有效信号沿时,再去根据锁存的方向信号进行运动,在读取锁存方向信号到判断PULSE信号有跳变之间有一个偏差τ。而对于PULSE的有效边沿,有些驱动器是上升沿有效,而有些驱动器是下降沿有效。文中将上述类型的驱动器简称为先方向上升沿类型和先方向下降沿类型驱动器。

也有一些国内不太知名公司提供的驱动器,采取这样的方式:当捕捉到PULSE的有效信号沿时,再去即时读取方向信号,判断运动方向。在读取到有效信号沿后,距离读取方向信号也有一个时间偏差τ。下文中将此类驱动器称之为上升沿后方向和下降沿后方向类型驱动器。这种情况比较少见,在此不做讨论。


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