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Plunge tool drilling to 100% depth even if other depth is requested

Discussion in 'SketchUcam Bugs' started by 626Pilot, Apr 4, 2015.

  1. 626Pilot

    626Pilot New Member

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    Hello,

    I don't know if I have a setting wrong somewhere, but when I ask SketchUcam to drill less than all the way through (by typing a number in after the Plunge tool is selected - you can see it in the G-code below), it generates g-code to drill all the way through anyway. What am I doing wrong?

    Material thickness = 0.68"
    In/out overcut = 100%
    Diameter = 0.1875"
    Overhead gantry = Yes (this is a Probotix FireBall)
    Multipass = No
    3D GCode = No
    Table top is Z-Zero = No

    Here's some example g-code that I generated with SketchUcam:
    Code:
    %
(Generated by SketchUcam {1.2a})
(File: Board drilling jigs.skp)
(Bit diameter: 0.18750")
(Feed rate: 40.00000"/min)
(Plunge Feed rate: 25.00000"/min)
(Material Thickness: 0.68000")
(Material length: 44.00000" X width: 12.00000")
(Overhead Gantry: true)
(Retract feed rate NOT limited to plunge feed rate)
(Optimization is ON)
(www.PhlatBoyz.com)
G90 G20 G49 
M3 S15000
(Group: _depth_90.0)
G0   Z1.0000    
   X10.0312      Y43.4687  
(PLUNGE limiting Z to min_z @min_z)
G1   Z0.0000     F25  
(Group complete: _depth_90.0)
(Group: _depth_90.0)
G0   Z1.0000    
   X6.0000    
(PLUNGE limiting Z to min_z @min_z)
G1   Z0.0000     F25  
(Group complete: _depth_90.0)
(Group: _depth_90.0)
G0   Z1.0000    
   X1.9688    
(PLUNGE limiting Z to min_z @min_z)                                                                                                        
G1   Z0.0000     F25                                                                                                                        
(Group complete: _depth_90.0)                                                                                                              
(Group: _diam_0.25_depth_75.0)                                                                                                              
G0   Z1.0000                                                                                                                                
   X11.6250      Y40.0000                                                                                                                  
(plungebore    depth=0.5100        diam=0.2500    )                                                                                        
G00   Y39.96875                                                                                                                            
G01    Z0.00000    F40                                                                                                                      
G03     X11.62500      Y39.96875   I0.0    J0.03125                                                                                        
G00   Y40.0000       Z1.0000                                                                                                                
(plungebore end)                                                                                                                            
(Group complete: _diam_0.25_depth_75.0)                                                                                                    
(Group: _diam_0.25_depth_75.0)                                                                                                              
G0   X0.3750                                                                                                                                
(plungebore    depth=0.5100        diam=0.2500    )                                                                                        
G00   Y39.96875                                                                                                                            
G01    Z0.00000    F40                                                                                                                      
G03     X0.37500       Y39.96875   I0.0    J0.03125                                                                                        
G00   Y40.0000       Z1.0000                                                                                                                
(plungebore end)                                                                                                                            
(Group complete: _diam_0.25_depth_75.0)                                                                                                    
(Group: _diam_0.25_depth_75.0)                                                                                                              
G0   X11.6250      Y4.0000                                                                                                                  
(plungebore    depth=0.5100        diam=0.2500    )                                                                                        
G00   Y3.96875                                                                                                                              
G01    Z0.00000    F40                                                                                                                      
G03     X11.62500      Y3.96875    I0.0    J0.03125                                                                                        
G00   Y4.0000        Z1.0000    
(plungebore end)
(Group complete: _diam_0.25_depth_75.0)
(Group: _diam_0.25_depth_75.0)
G0   X0.3750    
(plungebore    depth=0.5100        diam=0.2500    )
G00   Y3.96875  
G01    Z0.00000    F40  
G03     X0.37500       Y3.96875    I0.0    J0.03125  
G00   Y4.0000        Z1.0000    
(plungebore end)
(Group complete: _diam_0.25_depth_75.0)
(Group: _depth_30.0)
G0   X4.5278       Y41.8252  
(PLUNGE limiting Z to min_z @min_z)
G1   Z0.0000     F25  
(Group complete: _depth_30.0)
(Group: _depth_30.0)
G0   Z1.0000    
   X3.8742       Y41.6322  
(PLUNGE limiting Z to min_z @min_z)
G1   Z0.0000     F25  
(Group complete: _depth_30.0)
(Group: _depth_30.0)
G0   Z1.0000    
   X3.3559       Y41.8306  
(PLUNGE limiting Z to min_z @min_z)
G1   Z0.0000     F25  
(Group complete: _depth_30.0)
(Group: _depth_30.0)
G0   Z1.0000    
   X3.9783       Y42.0613  
(PLUNGE limiting Z to min_z @min_z)
G1   Z0.0000     F25  
(Group complete: _depth_30.0)
G0   Z1.0000    
G0 X0 Y0 (home)
G0   Z5.0000    
M05
M30
%
     
    626Pilot, Apr 4, 2015
    #1
  2. swarfer

    swarfer Moderator Staff Member

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    Trophy Points:
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    Location:
    Grahamstown, South Africa
    you need to fix the error messages first!
    the sprinkling of
    (PLUNGE limiting Z to min_z @min_z)
    in the code indicates that you have not set the min-z and max_z correctly as detailed in the help...

    do this
    click big blue question mark in toolbar
    click 'Change default options'
    click 'Machine options' and look for min_z and max_z and you will find it says
    Code:
    Min_z
Set this to negative (-) your Z travel. Gcode will never contain Z travel more than this figure.
Max_z
Set this to your Z travel. Gcode will never contain Z travel more than this figure.
    (while you are there, please read all the help)
    When you installed SketchUcam these values were set to -100mm and 100mm, but now min_z is limiting to 0, so you must have changed it.

    To get it cutting correctly you need to change those values to:
    min_z = -3"
    max_z = 3"
    or if you have the bigger router, -5 and 5 inches

    If you really want Z to never go below 0 and have min_z set to 0 to enforce it, then you HAVE TO use the Table top is Z-zero option, where the tool bit is zeroed to the table top instead of the top of the material. This will also mean you cannot cut all the way through the material, in effect limiting 'inside/outside overcut%' to 100 (in which case do set it to 100% rather than let the limits get hit).

    Those Probotix routers look quite nice!
     
    swarfer, Apr 5, 2015
    #2
  3. 626Pilot

    626Pilot New Member

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    Ah, thank you! I read a lot of the help, but that particular convention escaped me. I thought min and max were absolute, not relative (i.e. a router with 5" of Z would have min=0 and max=5, an "upside-down" router would have min=-5 and max=0, etc.)

    I was also confused about the "Table top is Z-Zero" setting. It might be easier to write it "Table top is Z=Zero".

    I now have these settings:
    Min_z = -5
    Max_z = 5
    Overcut = 100%
    Overhead Gantry = True
    Multipass = True (depth 0.15") - I'm cutting plywood with a 3/16" end mill, so this seems reasonable
    Stepover = 30%
    Generate 3D GCode = False

    The G-code looks a lot more elaborate now (particularly on the plungebores), and I can see that it's not drilling all the way through:
    Code:
    %
(Generated by SketchUcam {1.2a})
(File: Board drilling jigs.skp)
(Bit diameter: 0.18750")
(Feed rate: 40.00000"/min)
(Plunge Feed rate: 25.00000"/min)
(Material Thickness: 0.68000")
(Material length: 44.00000" X width: 12.00000")
(Overhead Gantry: true)
(Retract feed rate NOT limited to plunge feed rate)
(Multipass enabled, Depth = 0.15000")
(Optimization is ON)
(Z ZERO IS TABLETOP)
(www.PhlatBoyz.com)
G90 G20 G49
M3 S15000
(Group: _depth_85.0)
G0   Z1.6800   
(Pass: 1)
   X10.0312      Y43.4687 
(plungebore    depth=0.5780        diam=0.1875    )
G01   Z0.5300     F25 
G00   z1.6800   
G01   Z0.3800   
G00   z1.6800   
G01   Z0.2300   
G00   z1.6800   
G01   Z0.1020   
G00   z1.6800   
G00   Y43.4687       Z1.6800   
(plungebore end)
(Group complete: _depth_85.0)
(Group: _depth_85.0)
(Pass: 1)
G0   X6.0000   
(plungebore    depth=0.5780        diam=0.1875    )
G01   Z0.5300     F25 
G00   z1.6800   
G01   Z0.3800   
G00   z1.6800   
G01   Z0.2300   
G00   z1.6800   
G01   Z0.1020   
G00   z1.6800   
G00   Y43.4687       Z1.6800   
(plungebore end)
(Group complete: _depth_85.0)
(Group: _depth_85.0)
(Pass: 1)
G0   X1.9688   
(plungebore    depth=0.5780        diam=0.1875    )
G01   Z0.5300     F25 
G00   z1.6800   
G01   Z0.3800   
G00   z1.6800   
G01   Z0.2300   
G00   z1.6800   
G01   Z0.1020   
G00   z1.6800   
G00   Y43.4687       Z1.6800   
(plungebore end)
(Group complete: _depth_85.0)
(Group: _diam_0.25_depth_75.0)
(Pass: 1)
G0   X11.6250      Y40.0000 
(plungebore    depth=0.5100        diam=0.2500    )
G01   Z0.5300     F25 
G00   z1.6800   
G01   Z0.3800   
G00   z1.6800   
G01   Z0.2300   
G00   z1.6800   
G01   Z0.1700   
G00   z1.6800   
G00   Y39.96875 
G01    Z0.68000    F40 
G03     X11.62500      Y39.96875      Z0.53000    I0    J0.03125 
G03     X11.62500      Y39.96875      Z0.38000    I0    J0.03125 
G03     X11.62500      Y39.96875      Z0.23000    I0    J0.03125 
G03     X11.62500      Y39.96875      Z0.17000    I0    J0.03125 
G03     X11.62500      Y39.96875   I0.0    J0.03125 
G00   Y40.0000       Z1.6800   
(plungebore end)
(Group complete: _diam_0.25_depth_75.0)
(Group: _diam_0.25)
(Pass: 1)
G0   X0.3750   
(plungebore    depth=0.6800        diam=0.2500    )
G01   Z0.5300     F25 
G00   z1.6800   
G01   Z0.3800   
G00   z1.6800   
G01   Z0.2300   
G00   z1.6800   
G01   Z0.0800   
G00   z1.6800   
G01   Z0.0000   
G00   z1.6800   
G00   Y39.96875 
G01    Z0.68000    F40 
G03     X0.37500       Y39.96875      Z0.53000    I0    J0.03125 
G03     X0.37500       Y39.96875      Z0.38000    I0    J0.03125 
G03     X0.37500       Y39.96875      Z0.23000    I0    J0.03125 
G03     X0.37500       Y39.96875      Z0.08000    I0    J0.03125 
G03     X0.37500       Y39.96875      Z0.00000    I0    J0.03125 
G03     X0.37500       Y39.96875   I0.0    J0.03125 
G00   Y40.0000       Z1.6800   
(plungebore end)
(Group complete: _diam_0.25)
(Group: _diam_0.25)
(Pass: 1)
G0   X11.6250      Y4.0000   
(plungebore    depth=0.6800        diam=0.2500    )
G01   Z0.5300     F25 
G00   z1.6800   
G01   Z0.3800   
G00   z1.6800   
G01   Z0.2300   
G00   z1.6800   
G01   Z0.0800   
G00   z1.6800   
G01   Z0.0000   
G00   z1.6800   
G00   Y3.96875 
G01    Z0.68000    F40 
G03     X11.62500      Y3.96875       Z0.53000    I0    J0.03125 
G03     X11.62500      Y3.96875       Z0.38000    I0    J0.03125 
G03     X11.62500      Y3.96875       Z0.23000    I0    J0.03125 
G03     X11.62500      Y3.96875       Z0.08000    I0    J0.03125 
G03     X11.62500      Y3.96875       Z0.00000    I0    J0.03125 
G03     X11.62500      Y3.96875    I0.0    J0.03125 
G00   Y4.0000        Z1.6800   
(plungebore end)
(Group complete: _diam_0.25)
(Group: _diam_0.25)
(Pass: 1)
G0   X0.3750   
(plungebore    depth=0.6800        diam=0.2500    )
G01   Z0.5300     F25 
G00   z1.6800   
G01   Z0.3800   
G00   z1.6800   
G01   Z0.2300   
G00   z1.6800   
G01   Z0.0800   
G00   z1.6800   
G01   Z0.0000   
G00   z1.6800   
G00   Y3.96875 
G01    Z0.68000    F40 
G03     X0.37500       Y3.96875       Z0.53000    I0    J0.03125 
G03     X0.37500       Y3.96875       Z0.38000    I0    J0.03125 
G03     X0.37500       Y3.96875       Z0.23000    I0    J0.03125 
G03     X0.37500       Y3.96875       Z0.08000    I0    J0.03125 
G03     X0.37500       Y3.96875       Z0.00000    I0    J0.03125 
G03     X0.37500       Y3.96875    I0.0    J0.03125 
G00   Y4.0000        Z1.6800   
(plungebore end)
(Group complete: _diam_0.25)
G0 X0 Y0 (home)
G0   Z5.0000   
M05
M30
%
     
    626Pilot, Apr 6, 2015
    #3
  4. swarfer

    swarfer Moderator Staff Member

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    yup, you got it right now, zero Z on the table surface and away you go!
     
    swarfer, Apr 6, 2015
    #4

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