Lathe Feature Iteration

Feature and feedback iteration for lathe processes is useful for calculating things like part complexity from within P3L. The way our lathe interrogation works is it analyzes a part based on your live tooling parameters. You can specify your live tooling parameters in your custom interrogations tab (check our our custom interrogations article for more information). Based on the inputs you give us, it will shape the features and feedback that come out of interrogation. The cheat sheet below will give you all you need to get started. For more specific descriptions on what each of the features and feedback types are, check out our lathe interrogation article.

Cheat Sheet

lathe = analyze_lathe()  # request interrogation

# get features
for feature in get_features(lathe):
  do_something = 1

# get feedback
for feedback in get_feedback(lathe):
  feedback.level  # cost_driver, manufacturing_issue, complete_exclusion
  do_something = 1

# get features by specific name
for hole in get_features(lathe, name='live_tooling_hole'):
  do_something = 1

# get feedback by specific name
for cavity in get_feedback(lathe, name='asymmetric_cavity'):
  do_something = 1

# get count of feature type
count_of_holes = len(get_features(lathe, name='live_tooling_hole'))
# get count of feedback type
count_of_off_axis_holes = len(get_feedback(lathe, name='off_axis_hole'))

# access features and feedback directly using the dot operator from the analyze_lathe object
# returns copies of p3l lists that can be manipulated
features = lathe.features.filter(lambda x: == 'live_tooling_hole').sort(lambda x: -x.area)
for f in iterate(features):
  do_something = 1

for f in iterate(
  do_something = 1

Feature Reference

Name Properties
lathe_internal_cut area
lathe_external_cut area
lathe_setup n/a
live_tooling_axial_direction area
live_tooling_cavity area
live_tooling_hole area, bottom_type (flat, obstructed, tipped, thru), depth, min_radius, volume
live_tooling_protrusion area
live_tooling_radial_direction area

Feedback Reference

Name Level Properties
asymmetric_cavity cost_driver n/a
bore_hole_wo_relief cost-driver relief_depth_to_diameter
lateral_tool_space manufacturing_issue n/a
lathe_incompatible_faces manufacturing_issues n/a
lathe_long_part complete_exclusion n/a
lathe_slender_part cost_driver length_to_min_diameter
lathe_small_internal_rad cost_driver radius
lathe_steep_profile cost_driver angle
lathe_uncuttable_faces manufacturing_issue n/a
lathe_wide_part complete_exclusion n/a
no_lathe_axis complete_exclusion n/a
off_axis_hole manufacturing_issue area, bottom_type (flat, obstructed, tipped, thru), depth, min_radius, volume


The example below demonstrates how to come up with a basic complexity metric of the part based on the appearance of certain features and feedback.

lathe = analyze_lathe()

# level 1, 2, or 3
complexity = var('Complexity', 0, 'Part complexity', number, frozen=False)

# if there are either asymmetric cavities or off axis holes, immediately level 2
# if there are more than 10, level 3
count_cavity = len(get_feedback(lathe, name='asymmetric_cavity'))
count_holes = len(get_feedback(lathe, name='off_axis_hole'))
total_count = count_cavity + count_holes
if 0 < total_count <= 10:
elif total_count > 10:

# if the part is either too long or to wide, immediate level 3
is_wide = len(get_feedback(lathe, name='lathe_wide_part')) > 0
is_long = len(get_feedback(lathe, name='lathe_long_part')) > 0
if is_long or is_wide:

# store complexity in workpiece for utilization in downstream ops
set_workpiece_value('complexity', complexity)

DAYS = 0
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