【判断题】【消耗次数：1】
脉冲增量插补和数据采样插补由于其计算方法不同，其速度控制方法也有不同。该说法（ ）
①
正确
②
错误
参考答案：
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【多选题】
下述有关数字增量插补的说法，正确的是（）
①
数字增量插补为位置标量插补
②
插补分粗插补和精插补两步
③
进给速度的上限主要取决于插补误差
④
位置步长与插补周期无关
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