54 lines
1.7 KiB
Plaintext
54 lines
1.7 KiB
Plaintext
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Heightmap probing:
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1. define the grid:
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- from: x, y
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- to: x, y
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- step every: 5mm?
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- clearance height: Z1.5
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- start probing at: Z0.5
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- max negative z: Z-0.5 (when to fail probing)
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- z final safety height: Z15
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- from and to can be filled from current project bounding box
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2. probing
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- machine moves at grid start position (x, y)
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G0X0Y0
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- gets down for initial probing
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G38.2 Z-65 F100
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- step back a bit (1mm, relative)
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G91 G0 Z1
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- seek again with lower feed rate
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G38.2 Z-5 F5
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- after first probe ever, this Z becomes reference 0
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G10 L20 P0 Z0
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- all subsequent probes will be relative to this
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- for each probing location:
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- G0 Z"clearance height"
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- G0 XxxYyyy (next point location)
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- G0 Z"start probing at"
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- G38.2 Z-5 F5
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- store Z offset and place it in the heightmap
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3. modify loaded program with heightmap data
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- foreach line in program
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- if line contains a Z coordinate, update the Z according to the X and Y
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- if line does not contain a Z coordinate, add a Z coordinate according to the X and Y
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Edge finding
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- prerequisites
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- which edge to find? -X/+X/-Y/+Y
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- bit diameter used
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- put the
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Corner finding
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- which corner are we probing: up left, up right, bottom left, bottom right
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- need to know the bit diameter
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- use G38.2 to probe X edge and set that as current X - diam/2
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DONE - Show program extents
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Render program extents
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- show a blue bounding box for the program extents
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