器材是普通赤道仪,改装控制器为单轴导星,软件用PHD2.5,QHY5ii-M ,130MM导星镜,测试时,镜头指向东面、北面能正常导星,但当镜头指向天顶、西面目标(角度高、低都试了),PHD就提示:YOUR MAX RA duration setting is preventing PHD from making adequate corrections to keep the guide star lockded,increasing the max ra duration setting will allow phd to make the needed。偿试更改PHD里面的赤道仪数值,但问题依然。是什么问题,是软件问题还是控制器问题(控制器测试用人工导星方式时,反应和方向是正常)