DHP linear servo Z-Probe

thingiverse

This is a Z-Probe that I designed for my 3KU printer, but can be used for a wide range of printers, simply by adjusting the lower guide. You will need: the STL files printed; note the body is actually TWO parts with a skirt that you cut off after printing; this minimises warping during printing 1 x 2mm aluminium knitting needle (cut to length) 2 x M3x30mm screws with nuts to mount the optical end-stop and hold the halves together. 2 x M20 (Optional) to hold the upper part of the halves together 1 x M2x8mm self tapping screw two close the lower arm firmly around the needle 1 x optical endstop 4 x M1x5 self tapping screws to mount the linear micro servo 1 x micro linear servo (left) - these come as "left" and "right" units; get the LEFT one, here is and example: https://www.aliexpress.com/item/3-7-5V-RC-Servo-Plastic-Nylon-Gear-Digital-Linear-Servo-For-RC-Ultra-micro-Aircraft/32972306205.html?spm=a2g0s.13010208.99999999.260.2f5f3c00yk4zp5 NOTE: I have picked a seller at random, I have no affiliation at all with this seller. I hope you find this useful, this is the ONLY probe I have successfully used now that I have a PEI build sheet on my 3KU. As I am using Smoothie; my config has: <code> \## Z-probe \# See http://smoothieware.org/zprobe \# Switch module for servo control switch.servo.enable true \# switch.servo.input_on_command M280 \# M280 S7.5 would be midway switch.servo.input_off_command M281 \# same as M280 S0 0% duty cycle, effectively off switch.servo.output_pin 1.23 \# must be a PWM capable pin switch.servo.output_type hwpwm \# H/W pwm output settable with S parameter in the input_on_comand \#switch.servo.pwm_period_ms 20 \# set period to 20ms (50Hz) default is 50Hz zprobe.enable true \# Set to true to enable a z-probe 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_ms 1 \# Set if noisy zprobe.fast_feedrate 50 \# 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, custom_menu.dhp_probe_out.enable true \# custom_menu.dhp_probe_out.name DHP_Probe_Out \# custom_menu.dhp_probe_out.command M280S11 \# custom_menu.dhp_probe_In.enable true \# custom_menu.dhp_probe_In.name DHP_Probe_In \# custom_menu.dhp_probe_In.command M280S3 \# custom_menu.dhp_probe_bed.enable true \# custom_menu.dhp_probe_bed.name DHP_Probe_Bed \# custom_menu.dhp_probe_bed.command M280S12.0|G32|M280S3.0|G1X0Y0Z10 \# \# Delta grid leveling strategy leveling-strategy.delta-grid.enable true \# Enable grid levelling leveling-strategy.delta-grid.radius 80 \# Grid radius in millimeters leveling-strategy.delta-grid.size 11 \# Grid size, must be an odd number leveling-strategy.delta-grid.do_home true \# Whether to home before calibration leveling-strategy.delta-grid.save true \# Whether to automatically save the grid leveling-strategy.delta-grid.initial_height 10 \# Height at which to start probing leveling-strategy.delta-grid.probe_offsets -13,7,2.2 \# Z-Probe Offset </code> I deploy the probe, you go: M280S11 to retract the probe go: M280S3 Or as Have a LCD attached, I go the the custom menu page and select: dhp_probe_out or dhp_probe_in or to run the levelling strategy: dhp_probe_bed with a M500 at the end to save the config override file on the internal SD Card I dumped Marlin a while ago so I am not sure how to specify the equivalent in Marlin. Here is a video of it working https://youtu.be/ga1Hua26YZo