Problem with PNP NO Probe

[sgibbers17]

I am having trouble with my PNP probe.  I have it powered by 12V and a 10K/15K voltage divider were when picked up I get a 4.5 volts on the signal wire.  Here is my wiring diagram that I followed.

As far as I can tell It is working correctly where I get 4.5 volts on the signal wire when I have it disconnected from the smoothieboard and metal is detected 0V when no metal is detected.  When I am connected to the smoothieboard I get 2.0 volts on the signal wire when no metal detected and 4.5 volts when metal is detected.  When I test the zmin header signal pin I get 4.7V same with the power pin.

With 2 volts always on the signal wire I can not get my smoothieboard to detect if the sensor is picked up or dropped out.

Here is a copy of my config file so far.

# NOTE Lines must not exceed 132 characters

# Robot module configurations : general handling of movement G-codes and slicing into moves

default_feed_rate                            4000             # Default rate ( mm/minute ) for G1/G2/G3 moves

default_seek_rate                            4000             # Default rate ( mm/minute ) for G0 moves

mm_per_arc_segment                           0.0              # Fixed length for line segments that divide arcs 0 to disable

mm_max_arc_error                             0.01             # The maximum error for line segments that divide arcs 0 to disable

                                                              # note it is invalid for both the above be 0

                                                              # if both are used, will use largest segment length based on radius

#mm_per_line_segment                         0.5              # Lines can be cut into segments ( not useful with cartesian

                                                              # coordinates robots ).

delta_segments_per_second                    100              # for deltas only same as in Marlin/Delta, set to 0 to disable

                                                              # and use mm_per_line_segment

# Arm solution configuration : Cartesian robot. Translates mm positions into stepper positions

arm_solution                                 linear_delta     # selects the delta arm solution

alpha_steps_per_mm                           200              # Steps per mm for alpha stepper

beta_steps_per_mm                            200              # Steps per mm for beta stepper

gamma_steps_per_mm                           200              # Steps per mm for gamma stepper

arm_length                                   309              # this is the length of an arm from hinge to hinge

arm_radius                                   185              # this is the horizontal distance from hinge to hinge

                                                              # when the effector is centered

# Planner module configuration : Look-ahead and acceleration configuration

planner_queue_size                           32               # DO NOT CHANGE THIS UNLESS YOU KNOW EXACTLY WHAT YOU ARE DOING

acceleration                                 3000             # Acceleration in mm/second/second.

junction_deviation                           0.05             # Similar to the old "max_jerk", in millimeters,

                                                              # see https://github.com/grbl/grbl/blob/master/planner.c#L409

                                                              # and https://github.com/grbl/grbl/wiki/Configuring-Grbl-v0.8

                                                              # Lower values mean being more careful, higher values means being

                                                              # faster and have more jerk

#minimum_planner_speed                       0.0              # sets the minimum planner speed in mm/sec

# Stepper module configuration

microseconds_per_step_pulse                  1                # Duration of step pulses to stepper drivers, in microseconds

base_stepping_frequency                      100000           # Base frequency for stepping

# Cartesian axis speed limits

x_axis_max_speed                             30000            # mm/min

y_axis_max_speed                             30000            # mm/min

z_axis_max_speed                             30000            # mm/min

# Stepper module pins ( ports, and pin numbers, appending "!" to the number will invert a pin )

alpha_step_pin                               2.0              # Pin for alpha stepper step signal

alpha_dir_pin                                0.5              # Pin for alpha stepper direction

alpha_en_pin                                 0.4              # Pin for alpha enable pin

alpha_current                                1                # X stepper motor current

alpha_max_rate                               30000.0          # mm/min

beta_step_pin                                2.1              # Pin for beta stepper step signal

beta_dir_pin                                 0.11             # Pin for beta stepper direction

beta_en_pin                                  0.10             # Pin for beta enable

beta_current                                 1                # Y stepper motor current

beta_max_rate                                30000.0          # mm/min

gamma_step_pin                               2.2              # Pin for gamma stepper step signal

gamma_dir_pin                                0.20             # Pin for gamma stepper direction

gamma_en_pin                                 0.19             # Pin for gamma enable

gamma_current                                1                # Z stepper motor current

gamma_max_rate                               30000.0          # mm/min

# Serial communications configuration ( baud rate default to 9600 if undefined )

uart0.baud_rate                              115200           # Baud rate for the default hardware serial port

second_usb_serial_enable                     false            # This enables a second usb serial port (to have both pronterface

                                                              # and a terminal connected)

#leds_disable                                true             # disable using leds after config loaded

#msd_disable                                 false            # disable the MSD (USB SDCARD) when set to true

#dfu_enable                                  false            # for linux developers, set to true to enable DFU

#watchdog_timeout                            10               # watchdog timeout in seconds, default is 10, set to 0 to disable the watchdog

# Extruder module configuration

extruder.hotend.enable                          true             # Whether to activate the extruder module at all. All configuration is ignored if false

extruder.hotend.steps_per_mm                    475.34           # Steps per mm for extruder stepper

extruder.hotend.default_feed_rate               600              # Default rate ( mm/minute ) for moves where only the extruder moves

extruder.hotend.acceleration                    500              # Acceleration for the stepper motor, as of 0.6, arbitrary ratio

extruder.hotend.max_speed                       50               # mm/s

extruder.hotend.step_pin                        2.3              # Pin for extruder step signal

extruder.hotend.dir_pin                         0.22             # Pin for extruder dir signal

extruder.hotend.en_pin                          0.21             # Pin for extruder enable signal

# extruder offset

#extruder.hotend.x_offset                        0                # x offset from origin in mm

#extruder.hotend.y_offset                        0                # y offset from origin in mm

#extruder.hotend.z_offset                        0                # z offset from origin in mm

# firmware retract settings when using G10/G11, these are the defaults if not defined, must be defined for each extruder if not using the defaults

#extruder.hotend.retract_length                  3               # retract length in mm

#extruder.hotend.retract_feedrate                45              # retract feedrate in mm/sec

#extruder.hotend.retract_recover_length          0               # additional length for recover

#extruder.hotend.retract_recover_feedrate        8               # recover feedrate in mm/sec (should be less than retract feedrate)

#extruder.hotend.retract_zlift_length            0               # zlift on retract in mm, 0 disables

#extruder.hotend.retract_zlift_feedrate          6000            # zlift feedrate in mm/min (Note mm/min NOT mm/sec)

delta_current                                1                   # First extruder stepper motor current

# Second extruder module configuration example

#extruder.hotend2.enable                          true             # Whether to activate the extruder module at all. All configuration is ignored if false

#extruder.hotend2.steps_per_mm                    140              # Steps per mm for extruder stepper

#extruder.hotend2.default_feed_rate               600              # Default rate ( mm/minute ) for moves where only the extruder moves

#extruder.hotend2.acceleration                    500              # Acceleration for the stepper motor, as of 0.6, arbitrary ratio

#extruder.hotend2.max_speed                       50               # mm/s

#extruder.hotend2.step_pin                        2.8              # Pin for extruder step signal

#extruder.hotend2.dir_pin                         2.13             # Pin for extruder dir signal

#extruder.hotend2.en_pin                          4.29             # Pin for extruder enable signal

#extruder.hotend2.x_offset                        0                # x offset from origin in mm

#extruder.hotend2.y_offset                        25.0             # y offset from origin in mm

#extruder.hotend2.z_offset                        0                # z offset from origin in mm

#epsilon_current                              1.5              # Second extruder stepper motor current

# Laser module configuration

laser_module_enable                          false            # Whether to activate the laser module at all. All configuration is

                                                              # ignored if false.

#laser_module_pin                             2.5             # this pin will be PWMed to control the laser. Only P2.0 - P2.5, P1.18, P1.20, P1.21, P1.23, P1.24, P1.26, P3.25, P3.26

                                                              # can be used since laser requires hardware PWM

#laser_module_maximum_power                   1.0             # this is the maximum duty cycle that will be applied to the laser

#laser_module_minimum_power                   0.0             # This is a value just below the minimum duty cycle that keeps the laser

                                                              # active without actually burning.

#laser_module_default_power                   0.8             # This is the default laser power that will be used for cuts if a power has not been specified.  The value is a scale between

                                                              # the maximum and minimum power levels specified above

#laser_module_pwm_period                      20              # this sets the pwm frequency as the period in microseconds

# Hotend temperature control configuration

temperature_control.hotend.enable            true             # Whether to activate this ( "hotend" ) module at all.

                                                              # All configuration is ignored if false.

temperature_control.hotend.thermistor_pin    0.23             # Pin for the thermistor to read

temperature_control.hotend.heater_pin        2.7              # Pin that controls the heater

temperature_control.hotend.thermistor        Semitec          # see http://smoothieware.org/temperaturecontrol#toc5

#temperature_control.hotend.beta             4066             # or set the beta value

temperature_control.hotend.set_m_code        104              #

temperature_control.hotend.set_and_wait_m_code 109            #

temperature_control.hotend.designator        T                #

temperature_control.hotend.max_temp         300              # Set maximum temperature - Will prevent heating above 300 by default

#temperature_control.hotend.min_temp         0                # Set minimum temperature - Will prevent heating below 0 by default

# safety control is enabled by default and can be overidden here, the values show the defaults

#temperature_control.hotend.runaway_heating_timeout      900   # max is 2040 seconds, how long it can take to heat up

#temperature_control.hotend.runaway_cooling_timeout        0   # max is 2040 seconds, how long it can take to cool down if temp is set lower

#temperature_control.hotend.runaway_range                20    # Max setting is 63°C

#temperature_control.hotend.p_factor         13.7             # permanently set the PID values after an auto pid

#temperature_control.hotend.i_factor         0.097            #

#temperature_control.hotend.d_factor         24               #

#temperature_control.hotend.max_pwm          64               # max pwm, 64 is a good value if driving a 12v resistor with 24v.

# Hotend2 temperature control configuration

#temperature_control.hotend2.enable            true             # Whether to activate this ( "hotend" ) module at all.

                                                              # All configuration is ignored if false.

#temperature_control.hotend2.thermistor_pin    0.25             # Pin for the thermistor to read

#temperature_control.hotend2.heater_pin        1.23              # Pin that controls the heater

#temperature_control.hotend2.thermistor        EPCOS100K        # http://smoothieware.org/temperaturecontrol#toc5

##temperature_control.hotend2.beta             4066             # or set the beta value

#temperature_control.hotend2.set_m_code        104              #

#temperature_control.hotend2.set_and_wait_m_code 109            #

#temperature_control.hotend2.designator        T1               #

#temperature_control.hotend2.p_factor          13.7           # permanently set the PID values after an auto pid

#temperature_control.hotend2.i_factor          0.097          #

#temperature_control.hotend2.d_factor          24             #

#temperature_control.hotend2.max_pwm          64               # max pwm, 64 is a good value if driving a 12v resistor with 24v.

temperature_control.bed.enable               true             #

temperature_control.bed.thermistor_pin       0.24             #

temperature_control.bed.heater_pin           2.5              #

temperature_control.bed.thermistor           Honeywell100K    # see http://smoothieware.org/temperaturecontrol#toc5

#temperature_control.bed.beta                4066             # or set the beta value

temperature_control.bed.set_m_code           140              #

temperature_control.bed.set_and_wait_m_code  190              #

temperature_control.bed.designator           B                #

#temperature_control.bed.bang_bang            false           # set to true to use bang bang control rather than PID

#temperature_control.bed.hysteresis           2.0             # set to the temperature in degrees C to use as hysteresis

                                                              # when using bang bang

# Switch module for fan control

switch.fan.enable                            true             #

switch.fan.input_on_command                  M106             #

switch.fan.input_off_command                 M107             #

switch.fan.output_pin                        2.6              #

switch.fan.output_type                       pwm              # pwm output settable with S parameter in the input_on_comand

#switch.fan.max_pwm                           255              # set max pwm for the pin default is 255

#switch.misc.enable                           true             #

#switch.misc.input_on_command                 M42              #

#switch.misc.input_off_command                M43              #

#switch.misc.output_pin                       2.4              #

#switch.misc.output_type                      digital          # just an on or off pin

# automatically toggle a switch at a specified temperature. Different ones of these may be defined to monitor different temperatures and switch different swithxes

# useful to turn on a fan or water pump to cool the hotend

#temperatureswitch.hotend.enable              true             #

#temperatureswitch.hotend.designator          T                # first character of the temperature control designator to use as the temperature sensor to monitor

#temperatureswitch.hotend.switch              misc             # select which switch to use, matches the name of the defined switch

#temperatureswitch.hotend.threshold_temp      60.0             # temperature to turn on (if rising) or off the switch

#temperatureswitch.hotend.heatup_poll         15               # poll heatup at 15 sec intervals

#temperatureswitch.hotend.cooldown_poll       60               # poll cooldown at 60 sec intervals

# Switch module for spindle control

#switch.spindle.enable                        false            #

# Endstops

endstops_enable                              true             # the endstop module is enabled by default and can be disabled here

delta_homing                                 true             # forces all three axis to home a the same time regardless of

                                                              # what is specified in G28

alpha_min_endstop                            nc               #

alpha_max_endstop                            1.25^!            # add ! to invert pullup if switch is NO to ground

alpha_homing_direction                       home_to_max      # Home up

alpha_max                                    0                #

beta_min_endstop                             nc               #

beta_max_endstop                             1.27^!            #

beta_homing_direction                        home_to_max      #

beta_max                                     0                #

gamma_min_endstop                            nc               #

gamma_max_endstop                            1.29^!            #

gamma_homing_direction                       home_to_max      #

gamma_max                                    300              #

alpha_max_travel                             600              # max travel in mm for alpha/X axis when homing

beta_max_travel                              600              # max travel in mm for beta/Y axis when homing

gamma_max_travel                             600              # max travel in mm for gamma/Z axis when homing

alpha_fast_homing_rate_mm_s                  200              # homing feedrates in mm/second

beta_fast_homing_rate_mm_s                   200              #

gamma_fast_homing_rate_mm_s                  200              #

alpha_slow_homing_rate_mm_s                  20               #

beta_slow_homing_rate_mm_s                   20               #

gamma_slow_homing_rate_mm_s                  20

alpha_homing_retract_mm                      5                # retract/bounce distance after homing in mm

beta_homing_retract_mm                       5                #

gamma_homing_retract_mm                      5                #

alpha_trim                                   0                 # software trim for alpha stepper endstop (in mm)

beta_trim                                    0                 # software trim for beta stepper endstop (in mm)

gamma_trim                                   0                 # software trim for gamma stepper endstop (in mm)

# optional enable limit switches, actions will stop if any enabled limit switch is triggered (all are set for delta)

#alpha_limit_enable                          false            # set to true to enable X min and max limit switches

#beta_limit_enable                           false            # set to true to enable Y min and max limit switches

#gamma_limit_enable                          false            # set to true to enable Z min and max limit switches

#move_to_origin_after_home                    true             # move XY to 0,0 after homing

#endstop_debounce_count                       100              # uncomment if you get noise on your endstops

# optional Z probe

zprobe.enable                                true           # set to true to enable a zprobe

zprobe.probe_pin                             1.28^          # pin probe is attached to if NC remove the !

zprobe.slow_feedrate                         5               # mm/sec probe feed rate

#zprobe.debounce_count                       100             # set if noisy

zprobe.fast_feedrate                         100             # move feedrate mm/sec

zprobe.probe_height                          5               # how much above bed to start probe

#gamma_min_endstop                           nc              # normally 1.28. Change to nc to prevent conflict,

# associated with zprobe the leveling strategy to use

#leveling-strategy.delta-calibration.enable   true            # basic delta calibration

#leveling-strategy.delta-calibration.radius   100             # the probe radius

# kill button (used to be called pause) maybe assigned to a different pin, set to the onboard pin by default

kill_button_enable                           true             # set to true to enable a kill button

kill_button_pin                              2.12             # kill button pin. default is same as pause button 2.12 (2.11 is another good choice)

# Panel

panel.enable                                 false             # set to true to enable the panel code

panel.lcd                                    smoothiepanel     # set type of panel

panel.encoder_a_pin                          3.25!^            # encoder pin

panel.encoder_b_pin                          3.26!^            # encoder pin

# Example for reprap discount GLCD

# on glcd EXP1 is to left and EXP2 is to right, pin 1 is bottom left, pin 2 is top left etc.

# +5v is EXP1 pin 10, Gnd is EXP1 pin 9

#panel.lcd                                   reprap_discount_glcd     #

#panel.spi_channel                           0                 # spi channel to use  ; GLCD EXP1 Pins 3,5 (MOSI, SCLK)

#panel.spi_cs_pin                            0.16              # spi chip select     ; GLCD EXP1 Pin 4

#panel.encoder_a_pin                         3.25!^            # encoder pin         ; GLCD EXP2 Pin 3

#panel.encoder_b_pin                         3.26!^            # encoder pin         ; GLCD EXP2 Pin 5

#panel.click_button_pin                      1.30!^            # click button        ; GLCD EXP1 Pin 2

#panel.buzz_pin                              1.31              # pin for buzzer      ; GLCD EXP1 Pin 1

#panel.button_pause_pin                      2.11^             # kill/pause          ; GLCD EXP2 Pin 8 either

#panel.back_button_pin                       2.11!^            # back button         ; GLCD EXP2 Pin 8 or

# pins used with other panels

#panel.up_button_pin                         0.1!              # up button if used

#panel.down_button_pin                       0.0!              # down button if used

#panel.click_button_pin                      0.18!             # click button if used

panel.menu_offset                            0                 # some panels will need 1 here

panel.alpha_jog_feedrate                     6000              # x jogging feedrate in mm/min

panel.beta_jog_feedrate                      6000              # y jogging feedrate in mm/min

panel.gamma_jog_feedrate                     200               # z jogging feedrate in mm/min

panel.hotend_temperature                     185               # temp to set hotend when preheat is selected

panel.bed_temperature                        60                # temp to set bed when preheat is selected

# Example of a custom menu entry, which will show up in the Custom entry.

# NOTE _ gets converted to space in the menu and commands, | is used to separate multiple commands

custom_menu.power_on.enable                true              #

custom_menu.power_on.name                  Power_on          #

custom_menu.power_on.command               M80               #

custom_menu.power_off.enable               true              #

custom_menu.power_off.name                 Power_off         #

custom_menu.power_off.command              M81               #

# Only needed on a smoothieboard

currentcontrol_module_enable                 true             #

return_error_on_unhandled_gcode              false            #

# network settings

network.enable                               false            # enable the ethernet network services

network.webserver.enable                     true             # enable the webserver

network.telnet.enable                        true             # enable the telnet server

#network.ip_address                          auto            # use dhcp to get ip address

network.ip_address                           192.168.1.31     # the IP address

# uncomment the 3 below to manually setup ip address

network.ip_mask                              255.255.255.0    # the ip mask

network.ip_gateway                           192.168.1.1      # the gateway address

#network.mac_override                         xx.xx.xx.xx.xx.xx  # override the mac address, only do this if you have a conflict

[Mark Cooper]

You need to use a bare mcu pin from an internal header. The endstops have external pull-ups.

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[sgibbers17]

Thanks that worked.