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May 4, 2020 09:51
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Find a set of parallels for machining vise
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| #!/usr/bin/env python | |
| # https://github.com/mgronhol/infeasible | |
| import Infeasible | |
| solution = Infeasible.Solution() | |
| ## Find a set of parallels for a milling vise to get suitable clamping depths | |
| @solution.must_satisfy | |
| def no_larger_on_top_constraint( params, candidate ): | |
| if len( candidate ) > 1: | |
| for i in range( 1, len( candidate ) ): | |
| if (candidate[i-1][1] < candidate[i][1]) or (candidate[i-1][0] < candidate[i][0]): | |
| return False | |
| return True | |
| @solution.must_satisfy | |
| def no_duplicate_parallels_constraint( params, candidate ): | |
| return len( candidate ) == len( set( candidate ) ) | |
| @solution.must_satisfy | |
| def no_too_large_stack_constraint( params, candidate ): | |
| return len(candidate) < 3 | |
| @solution.is_valid | |
| def target_height_reached( params, candidate ): | |
| height = sum( c[0] for c in candidate ) | |
| return height == params["target"] | |
| ## Set of parallels | |
| parallels = [] | |
| parallels.append( (5, 2) ) | |
| parallels.append( (10, 2) ) | |
| parallels.append( (15, 2) ) | |
| parallels.append( (20, 2) ) | |
| parallels.append( (6, 3) ) | |
| parallels.append( (11, 3) ) | |
| parallels.append( (16, 3) ) | |
| parallels.append( (21, 3) ) | |
| parallels.append( (7, 4) ) | |
| parallels.append( (12, 4) ) | |
| parallels.append( (17, 4) ) | |
| parallels.append( (22, 4) ) | |
| parallels.append( (8, 5) ) | |
| parallels.append( (13, 5) ) | |
| parallels.append( (18, 5) ) | |
| parallels.append( (23, 5) ) | |
| parallels.append( (9, 6) ) | |
| parallels.append( (14, 6) ) | |
| parallels.append( (19, 6) ) | |
| parallels.append( (24, 6) ) | |
| for z in range( 31 ): | |
| dz = 45 - z | |
| print( z, "mm below vise top surface (stack height: %i mm):" % dz ) | |
| res = solution.get( params = {"target": dz}, domain = parallels ) | |
| res = sorted( res, key = lambda s: -s[0][1] ) | |
| for sol in res: | |
| print( " + ".join( "%ix%i" % (s[1], s[0]) for s in sol ) ) | |
| print( "" ) |
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