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I have had a few instances of the hot end crashing onto the bed plate during the V3 probing G code execution. Instead of gently poking the bed plate like normal it pushes so hard that the entire hot end tips up on one ball socket nearly togging the other two. Sometimes when this happens the Cal. routine will stop requiring a reset. After going through this once or twice, the calibration seem to work normal and the printer runs just fine. However, it is very disconcerting to say the least and I don't want to damage the printer in any way.

Has anyone else seen this and how do I prevent it from happening again?

Thanks for your help

What probing g-code are you running? What firmware release are you running? (turn the knob two ticks clockwise - you're after the value after "FW DATE:".)

g.

FW date is 20161209. FW version is 0.92.2

The script is as follows:
; Rostock Max v2/v3 Delta Auotcalibration Script
G69 S2 ;Endstop Calibration
M117 ENDSTOPS CALIBRATED
G68 ;Horizontal Radius Calibration
M117 HORIZONTAL RADIUS CALIBRATED
G30 S2 ;Z height calibration
M117 Z Height Calibrated
G4 S2
M500
M117 SAVING CALIBRATION
; MatterControl - SeeMeCNC Version 1.6.1 Build 1.6.1.7970 : GCode settings used
; Date 12/13/2016 00:00:00 Time 18:03
; avoid_crossing_perimeters = 1
; bed_shape = circular
; bed_size = 280,280
; bed_temperature = 0
; bottom_clip_amount = 0
; bottom_solid_layers = 6
; layer_to_pause =
; bridge_acceleration = 0
; bridge_fan_speed = 100
; bridge_flow_ratio = 1
; bridge_speed = 60
; brim_width = 0
; build_height = 400
; cancel_gcode = M104 S0\nG28
; center_part_on_bed = 1
; complete_objects = 0
; connect_gcode =
; cool_extruder_lift = 0
; cooling = 1
; create_raft = 0
; raft_extra_distance_around_part = 5
; raft_air_gap = .2
; raft_fan_speed_percent = 100
; raft_print_speed = 40
; default_acceleration = 0
; disable_fan_first_layers = 2
; end_gcode = M104 S0 ; turn off temperature\nG91\nG1 Z5.0 E-3.5 F12000\nG90\nG28 \nM84 ; disable motors
; external_perimeter_speed = 30
; external_perimeters_first = 0
; extra_perimeters = 1
; extruder_clearance_height = 20
; extruder_clearance_radius = 20
; extruder_count = 1
; extruder_offset = 0x0
; extruders_share_temperature = 0
; heat_extruder_before_homing = 1
; merge_overlapping_lines = 1
; expand_thin_walls = 1
; extrusion_axis = E
; extrusion_multiplier = 1
; extrusion_width = 0.6
; fan_always_on = 0
; fan_below_layer_time = 60
; filament_cost = 0
; filament_density = 1.24
; filament_diameter = 1.75
; fill_angle = 0
; fill_density = 30%
; fill_pattern = rectilinear
; fill_thin_gaps = 1
; first_layer_acceleration = 0
; first_layer_bed_temperature = 0
; first_layer_extrusion_width = 180%
; first_layer_height = 0.3
; first_layer_speed = 15
; recover_first_layer_speed = 10
; recover_is_enabled = 1
; z_homes_to_max = 1
; recover_position_before_z_home = 0,0
; first_layer_temperature = 200
; g0 = 0
; gap_fill_speed = 30
; gcode_arcs = 0
; gcode_comments = 0
; gcode_flavor = reprap
; gcode_output_type = REPRAP
; has_fan = 1
; has_hardware_leveling = 1
; has_heated_bed = 1
; include_firmware_updater = Simple Arduino
; has_power_control = 0
; has_sd_card_reader = 1
; show_reset_connection = 1
; infill_acceleration = 0
; infill_every_layers = 1
; infill_extruder = 1
; infill_extrusion_width = 0.6
; infill_first =
; infill_only_where_needed = 0
; infill_overlap_perimeter = 0.25
; infill_speed = 40
; infill_type = TRIANGLES
; print_leveling_solution = 3 Point Plane
; print_leveling_required_to_print = 0
; manual_probe_paper_width = .1
; layer_gcode =
; layer_height = 0.25
; solid_shell = 0
; max_fan_speed = 100
; min_extrusion_before_retract = 0.5
; min_fan_speed = 100
; min_print_speed = 7
; min_skirt_length = 3
; notes =
; nozzle_diameter = 0.5
; only_retract_when_crossing_perimeters = 1
; ooze_prevention = 0
; overhangs = 1
; output_filename_format = [input_filename_base].gcode
; calibration_files = Calibration - Box.stl
; output_only_first_layer = 0
; pause_gcode = G91\nG1 Z10 E-5.0 F12000\nG90
; perimeter_acceleration = 0
; perimeter_extruder = 1
; perimeter_extrusion_width = 0.6
; external_perimeter_extrusion_width = 100%
; perimeter_speed = 40
; perimeter_start_end_overlap = 100
; perimeters = 3
; post_process =
; print_center = 0,0
; raft_layers = 0
; randomize_start =
; resume_gcode = G91\nG1 Z-10 E5.5 F12000\nG90
; retract_before_travel = 5
; retract_layer_change = 0
; retract_length = 2.5
; retract_length_tool_change = 10
; retract_when_changing_islands = 1
; retract_lift = 0.5
; retract_restart_extra_toolchange = 0
; retract_restart_extra = 0
; retract_speed = 100
; repair_outlines_extensive_stitching = 1
; repair_outlines_keep_open = 1
; resolution = 0
; skirt_distance = 3
; skirt_height = 1
; skirts = 2
; brims = 0
; slowdown_below_layer_time = 40
; small_perimeter_speed = 30
; solid_fill_pattern = rectilinear
; solid_infill_below_area = 20
; solid_infill_every_layers = 0
; solid_infill_extrusion_width = 0.6
; solid_infill_speed = 30
; spiral_vase = 0
; standby_temperature_delta = -5
; start_gcode = G28
; start_perimeters_at_concave_points = 0
; start_perimeters_at_non_overhang = 1
; support_air_gap = 1
; support_material_angle = 0
; support_material_percent = 50
; support_material_infill_angle = 0
; support_material_create_internal_support = 0
; support_material_create_perimeter = 0
; support_material_enforce_layers = 0
; support_material_extruder = 1
; raft_extruder = 0
; support_material_extrusion_width = 100%
; support_material_interface_extruder = 1
; support_material_interface_layers = 0
; support_material_interface_spacing = 0
; support_material_pattern = rectilinear
; support_material_spacing = 2.5
; support_material_speed = 40
; support_material_threshold = 40
; support_material_xy_distance = 1
; support_material_z_distance = 0.15
; support_material_z_gap_layers = 1
; support_material = 0
; support_type = GRID
; temperature = 215
; extruder_wipe_temperature = 0
; bed_remove_part_temperature = 0
; thin_walls = 1
; threads = 4
; toolchange_gcode =
; before_toolchange_gcode =
; top_infill_extrusion_width = 0.6
; top_solid_infill_speed = 40
; top_solid_layers = 10
; travel_speed = 200
; use_firmware_retraction = 0
; use_relative_e_distances = 0
; baud_rate = 250000
; printer_name = Joe's V3
; auto_connect = 0
; com_port =
; vibration_limit = 0
; wipe = 1
; wipe_shield_distance = 0
; wipe_tower_size = 0
; z_can_be_negative = 0
; z_offset = 0

Don't use that script. Send "G29" to the printer and then follow up with the Delta calibration plugin for OctoPrint to refine the calibration.

g.

SO...I take it that I will need to download the OctoPrint SW and somehow through that interface "send" a G29 command to the printer (which I assume at this moment is connected via USB) then follow the instructions in OctoPrint to install the plugin?

Is that it? Will I need to re install the firmware again?

Thanks for your help!

You can run G29 right from the mattercontrol, Repetier, or Simplify3d.

Sent G29 to the printer and the print head crashed into the bed as before then everything freezes up and I have to cut the power to the printer to reboot.

When I try it again it seems to calibrate normally and the printer prints fine. I just don't think it should be doing this. I will post a video.

Also, I am not running from Raspberry PI so OctoPrint won't work for me. I will try to re install MatterSlice and re download the Cal. for SeeMeCNC website as I am also having other issues.