Manual tool change + tool lengh touch off

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19 Aug 2022 14:47 - 19 Aug 2022 14:48 #250076 by Todd Zuercher
Personally, I would manually probe all the tool holders for a job before starting, set them up in the tool table. and run the job I wouldn't want to mess with probing at each tool change. That way if you are running a job that uses 6 tools and you need to run it 10 times, you are only probing 6 times instead of 60. (Just my opinion and personal preference.)
Last edit: 19 Aug 2022 14:48 by Todd Zuercher.
The following user(s) said Thank You: tommylight

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21 Aug 2022 02:16 #250138 by andypugh
There are lots of ways to work. I find that I do most of my milling in G54 and tool zero just setting the axis (not tool) offsets. But then I do a lot of work just cranking the MPG or using MDI (often in polar coordinates)

It very much depends on the work you are doing, and I am generally making it up as I go along :-)

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28 Nov 2022 02:50 - 30 Nov 2022 23:16 #257815 by tightmopedman9
Removed due to inaccuracies in my knowledge of tool offsets
Last edit: 30 Nov 2022 23:16 by tightmopedman9.

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17 Jan 2023 16:15 - 17 Jan 2023 16:18 #262248 by furynick
I made a lot of work on the tool setter/probe, here is the latest version which is working fine with gmoccapy :
Update configuration file (ini)
[MACROS]
MACRO = init_probe

[TOUCHPLATE]
# Touchplate dimensions
OFFSETX = 3.306
OFFSETY = 3.767
OFFSETZ = 6.172

[TOOLSENSOR]
# Absolute coordinates of the toolsetter pad
X = 680.5
Y = 6.0
# Absolute Z start search coordinates, adjust to match the longest tool
Z =-25.0
# Absolute Z height to safely travel to toolsetter
TRAVELZ = 0.0
# Maximum search distance and direction (sign), adjust to match the difference between the longest and shortest tools
MAXPROBE = -25

[CHANGE_POSITION]
# Absolute coordinates of the tool change point
X = 650.0
Y = 100.0
Z = -10.0

[RS274NGC]
# Relative path to macros folder
SUBROUTINE_PATH = macros
REMAP=M6 modalgroup=6 prolog=change_prolog ngc=change epilog=change_epilog

change.ngc (stored in macros folder)
O<change> sub
  ;(debug, in change tool_in_spindle=#<tool_in_spindle> current_pocket=#<current_pocket>;)
  ;(debug, selected_tool=#<selected_tool> selected_pocket=#<selected_pocket>;)
  ;(debug, current tool z_offset=#5403)
 
  ;otherwise after the M6 this information is gone!
  #<xpos> = #<_x>                              (PRINT,save absolute X=#<_x>;)
  #<ypos> = #<_y>                              (PRINT,save absolute Y=#<_y>;)
  #<tlo> = #5403                               (PRINT,current offset for tool #<_selected_tool>=#<tlo>;)
  #<cht> = #<_ini[CHANGE_POSITION]TRAVELZ>
  #<chx> = #<_ini[CHANGE_POSITION]X>
  #<chy> = #<_ini[CHANGE_POSITION]Y>
  #<chz> = #<_ini[CHANGE_POSITION]Z>
  #<tsm> = #<_ini[TOOLSENSOR]MAXPROBE>
  #<tsx> = #<_ini[TOOLSENSOR]X>
  #<tsy> = #<_ini[TOOLSENSOR]Y>
  #<tsz> = #<_ini[TOOLSENSOR]Z>

  ; we must execute this only in the milltask interpreter
  ; or preview will break, so test for '#<_task>' which is 1 for
  ; the milltask interpreter and 0 in the UI's
  O100 if [#<_task> EQ 0]
  O100 return [999]
  O100 endif
 
  O200 if [#<_hal[gmoccapy.toolmeasurement]> EQ 0]
  O200 return [3] ; indicate no tool measurement
  O200 endif
 
  O300 if [#<_hal[gmoccapy.searchvel]> LE 0]
  O300 return [-1] ; indicate searchvel <= 0
  O300 endif
 
  O400 if [#<_hal[gmoccapy.probevel]> LE 0]
  O400 return [-2] ; indicate probevel <= 0
  O400 endif
 
  G53 G0 Z[#<cht>]                             (PRINT,move to travel height)
 
 
  G53 G0 X[#<chx>] Y[#<chy>]                   (PRINT,move to change position)
  G53 G0 Z[#<chz>]
  G49                                          (PRINT,cancel tool offset)
  G92.2                                        (PRINT,turn off G92 offsets)
 
  M6                                           (PRINT,real change tool)
 
  O700 if [#<_selected_tool> EQ 99]
    G10 L1 P99 Z0                              (PRINT,reset probe offset)
  O700 else
    G53 G0 X[#<tsx>] Y[#<tsy>]                 (PRINT,move to toolsensor)
    G53 G0 Z[#<tsz>]
    
    F #<_hal[gmoccapy.searchvel]>              (PRINT,set search speed)
    G91                                        (PRINT,relative move )
    G38.2 Z#<tsm>                              (PRINT,touch sensor)
    G0 Z2                                      (PRINT,release sensor)
    F #<_hal[gmoccapy.probevel]>               (PRINT,set probe speed)
    G38.2 Z-4                                  (PRINT,touch sensor)
    G90                                        (PRINT,absolute move)
    
    O800 if [#5070 EQ 0]
    O800 return [-3] ; indicate probe contact failure to epilog
    O800 endif
    
    G10 L10 P[#<_selected_tool>] Z[#4963]      (PRINT,set absolute offset for tool #<_selected_tool>;)
    G43
  O700 endif
  G92.3                                        (PRINT,restore G92 offsets)
  G53 G0 Z[#<cht>]                             (PRINT,move to travel height)
  G0 X[#<xpos>] Y[#<ypos>]                     (PRINT,return to where we were in WCS X=#<xpos> Y=#<ypos>;)
 
; signal success be returning a value > 0:
O<change> endsub [1]
M2


init_probe.ngc (stored in macros folder)
O<init_probe> SUB
                                                                   (PRINT,Probe init)
  G94                                                              (PRINT,use feedrate in units/min )
  G92.1                                                            (PRINT,remove G92 offsets)
  G90                                                              (PRINT,absolute distance mode)
  G49                                                              (PRINT,cancel tool length compensation)
  G40                                                              (PRINT,turn cutter compensation off)
  G10 L2 P0 X0 Y0 Z0                                               (PRINT,reset coordinate system)
  O100 IF [ #<_current_tool> NE 99 ]                               (PRINT,tool loaded: #<_current_tool>;)
    T99 M6                                                         (PRINT,mount probe)
  O100 ENDIF
  O101 IF [ #<_metric> EQ 1 ]                                      (PRINT,set probe feeds according to units )
    #<fast> =  150.0                                               (PRINT,selected metric units )
    #<slow> =   30.0
    #<retract> = 3.0
    #<tool_diam> = #5410                                           (PRINT,tool diameter=#<tool_diam>mm)
  O101 ELSE
    #<fast> =    6.0                                               (PRINT,selected imperial units )
    #<slow> =    1.2
    #<retract> = 0.1
    #<tool_diam> = #5410                                           (PRINT,tool diameter=#<tool_diam>in)
  O101 ENDIF
                                                                   (PRINT,touch plate Z probe)
  G38.2 Z[#<_ini[AXIS_Z]MIN_LIMIT>] F[#<fast>]                     (PRINT,Z probe toward workpiece with error )
  G91                                                              (PRINT,relative move )
  G0 Z[#<retract>]                                                 (PRINT,retract)
  G0 Z-[#<retract>/2]                                              (PRINT,move forward half retract distance)
  G38.2 Z-[#<retract>] F[#<slow>]                                  (PRINT,Z probe slowly, got Z probe at #5063)
  G10 L20 P0 Z[#<_ini[TOUCHPLATE]OFFSETZ>]                         (PRINT,set Z offset in current WCS)
  G0 Z#<retract>                                                   (PRINT,retract)
   
                                                                   (PRINT,touch plate X probe)
  G0 X-[#<retract> + #<tool_diam>]                                 (PRINT,move in front of touch plate)
  G0 Z-[#<retract> * 2]                                            (PRINT,go down by twice retract length)
  G38.2 X[#<retract> + #<tool_diam>] F[#<fast>]                    (PRINT,X probe toward workpiece with error )
  G0 X-[#<retract>]                                                (PRINT,retract)
  G0 X[#<retract>/2]                                               (PRINT,move forward half retract distance)
  G38.2 X[#<retract> + #<tool_diam>] F[#<slow>]                    (PRINT,X probe slowly, got X probe at #5061)
  G10 L20 P0 X-[#<_ini[TOUCHPLATE]OFFSETX> + #<tool_diam> / 2]     (PRINT,set X offset in current WCS)
  G0 X-[#<retract>] Z[#<retract>*2]                                (PRINT,retract)
 
                                                                   (PRINT,Touch plate Y probe)
  G0 X[#<retract> + #<tool_diam>] Y-[#<retract> + #<tool_diam>]    (PRINT,move below of touch plate)
  G0 Z-[#<retract>*2]                                              (PRINT,go down by twice retract length)
  G38.2 Y[#<retract> + #<tool_diam>] F[#<fast>]                    (PRINT,X probe toward workpiece with error)
  G0 Y-[#<retract>]                                                (PRINT,retract)
  G0 Y[#<retract>/2]                                               (PRINT,move forward half retract distance)
  G38.2 Y[#<retract> + #<tool_diam>] F[#<slow>]                    (PRINT,Y probe slowly, got Y probe at #5062)
  G10 L20 P0 Y-[#<_ini[TOUCHPLATE]OFFSETY> + #<tool_diam> / 2]     (PRINT,set Y offset in current WCS)
  G0 Y-[#<retract>] Z[#<retract> * 2]                              (PRINT,retract)

  G90                                                              (PRINT,absolute move)

  G0 X0 Y0                                                         (PRINT,move to travel height)
  G53 G0 Z[#<_ini[CHANGE_POSITION]TRAVELZ>]                        (PRINT,move to safe travel height)
  G53 G0 X[#<_ini[TOOLSENSOR]X>] Y[#<_ini[TOOLSENSOR]Y>]           (PRINT,move to toolsensor)
  G53 G0 Z[#<_ini[TOOLSENSOR]Z>]
 
  F #<_hal[gmoccapy.searchvel]>                                    (PRINT,set search speed)
  G91                                                              (PRINT,relative move )
  G38.2 Z#<_ini[TOOLSENSOR]MAXPROBE>                               (PRINT,touch sensor)
  G0 Z2                                                            (PRINT,release sensor)
  F #<_hal[gmoccapy.probevel]>                                     (PRINT,set probe speed)
  G38.2 Z-4                                                        (PRINT,touch sensor)
  #4963 = #5063                                                    (PRINT,store probe trigger Z value)
  G90                                                              (PRINT,absolute move)
  G53 G0 Z[#<_ini[CHANGE_POSITION]TRAVELZ>]                        (PRINT,move to travel height)
  G53 G0 X[#<_ini[CHANGE_POSITION]X>] Y[#<_ini[CHANGE_POSITION]Y>] (PRINT,move to change position)
  G53 G0 Z[#<_ini[CHANGE_POSITION]Z>]

O<init_probe> ENDSUB
M2
Last edit: 17 Jan 2023 16:18 by furynick.
The following user(s) said Thank You: Vector

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17 Jan 2023 16:26 #262250 by furynick
I forgot to explain the workflow, in my case the probe is a straight rod of 3.175mm (1/8in) :
Move manually approximately over the bottom/left corner of workpiece
Hit init_probe in gmoccapy
The probe (Tool 99) is loaded if it's not already
3 axis of touchplate are probed (Z, X and Y)
The probe is then probed on toolsetter and offset in current WCS is stored
Spindle is moved back to change position

M6 remap probe every tool on toolsetter using G10 L10 with previously stored offset value

Any comment is welcome to improve/secure the process

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