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#!/usr/bin/env python
"""
# EMC2 stepper SCALE calculation helper
# Copyright (c) 2009 Michael Buesch <mb@bu3sch.de>
# Licensed under the GNU GPL version 2 or (at your option) any later version.
"""
import sys
import getopt
degree_per_fullstep = 1.8
units_per_rev = None
range_max = 30
def usage():
print "Usage: %s [OPTIONS]" % sys.argv[0]
print ""
print "-u|--units-per-rev X Use X units per revolution (mandatory)"
print "-d|--deg-per-fullstep X Use X degree per motor-fullstep (default 1.8)"
print "-r|--range X List scale values up to X microsteps (default 30)"
print "-h|--help Print this help text"
try:
(opts, args) = getopt.getopt(sys.argv[1:],
"hu:d:r:",
[ "help", "units-per-rev=", "deg-per-fullstep=",
"range=", ])
for (o, v) in opts:
if o in ("-h", "--help"):
usage()
sys.exit(0)
if o in ("-u", "--units-per-rev"):
units_per_rev = float(v)
if o in ("-d", "--deg-per-fullstep"):
degree_per_fullstep = float(v)
if o in ("-r", "--range"):
range_max = int(v)
if units_per_rev is None:
raise ValueError()
except (ValueError, getopt.GetoptError):
usage()
sys.exit(1)
for microsteps in range(1, range_max + 1):
scale = (float(microsteps) / float(degree_per_fullstep)) *\
360.0 * (1.0 / float(units_per_rev))
print "%d microsteps => SCALE=%f" % (microsteps, scale)
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