我有一个旧的 Solidoodle 2，是我从车库销售中购买的，我正在将其转换为使用带有 Marlin 固件的 RAMPS 1.4。所有电机都正常工作，我只是在使限位器工作时遇到问题。
我正在使用一个普通的限位开关，NC 连接到信号引脚，另一个接地。我将此开关插入 X-min 的第一个标题列。我的终点站配置目前是：
//===========================================================================
//============================== Endstop Settings ===========================
//===========================================================================
// @section homing
// Specify here all the endstop connectors that are connected to any endstop or probe.
// Almost all printers will be using one per axis. Probes will use one or more of the
// extra connectors. Leave undefined any used for non-endstop and non-probe purposes.
#define USE_XMIN_PLUG true
#define USE_YMIN_PLUG true
#define USE_ZMIN_PLUG true
//#define USE_XMAX_PLUG false
//#define USE_YMAX_PLUG false
//#define USE_ZMAX_PLUG false
// coarse Endstop Settings
#define ENDSTOPPULLUPS // Comment this out (using // at the start of the line) to disable the endstop pullup resistors
#if DISABLED(ENDSTOPPULLUPS)
// fine endstop settings: Individual pullups. will be ignored if ENDSTOPPULLUPS is defined
//#define ENDSTOPPULLUP_XMAX
//#define ENDSTOPPULLUP_YMAX
//#define ENDSTOPPULLUP_ZMAX
//#define ENDSTOPPULLUP_XMIN
//#define ENDSTOPPULLUP_YMIN
//#define ENDSTOPPULLUP_ZMIN
//#define ENDSTOPPULLUP_ZMIN_PROBE
#endif
// Mechanical endstop with COM to ground and NC to Signal uses "false" here (most common setup).
#define X_MIN_ENDSTOP_INVERTING true // set to true to invert the logic of the endstop.
#define Y_MIN_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.
#define Z_MIN_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.
#define X_MAX_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.
#define Y_MAX_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.
#define Z_MAX_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.
#define Z_MIN_PROBE_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.
我启用并反转了 X-min。当我发送 M119（终点站状态代码）时，我收到：
Send: M119
Recv: Reporting endstop status
Recv: x_min: open
Recv: y_min: TRIGGERED
Recv: z_min: TRIGGERED
然后当我用手按下 X 限位器时，我得到：
Send: M119
Recv: Reporting endstop status
Recv: x_min: open
Recv: y_min: TRIGGERED
Recv: z_min: TRIGGERED
-没变化。开关没有机械故障，我已经用连续性测试仪对其进行了测试。我什至用跳线短接了斜坡板上的信号和接地引脚，但我仍然没有看到任何变化。
错在哪里？