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machine.cad
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machine.cad
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from koko.lib.shapes import *
from math import asin,degrees,cos
## WARNING ALL UNITS IN INCHES!
##############
# parts output
##############
# Use: assembled, all, bed, base, front, back, left, right
output="assembled"
################
# set parameters
################
bit=0.125 # Set this to the diameter of your bit
material_thickness=.5 # Set this to the material thickness
rod38dia=.375 # Set the diameter to cut for the 3/8 rod
rod12dia=.5 # Set the diameter to cut for the 1/2 rod
clearance=bit+.005 # Allow .05 for vibration
####################
# machine dimensions
####################
"""
X axis is the left-right movement
Y axis is the front-back movement
Z axis is the spindle vertical movement
Those are measured from exterior to exterior sides
"""
# adjust these for machine resize
bed_w=6.
bed_h=4.
bed_t=2.
# do not modify below
machineX=bed_w+4
machineY=bed_h+6
machineZ=8.5
#############
# MTM toolkit
#############
#
# CUSTOM SHAPE SELF ALIGNING ROD
#
def rod_align(x,y,rod_dia=.5,angle=0,long=True):
r1=rod_dia/2
r2=r1+.1
r3=r2+.13
r4=clearance/2
c1=circle(0,0,r1)
c2=circle(0,0,r2)
c3=circle(0,0,r3)
c4=circle(0,0,r4)
# rod
rod=c1
# outer ring
outer=c3-c2
centralrec=rectangle(-r3,r3,-.136/2,.136/2)
outer-=centralrec
# bar
bar=move(c4,r3,0)
alpha=math.asin((.136/2+.13/2)/r3)
bar=rotate(bar,degrees(alpha))
bar+=rectangle(0,r3*cos(alpha),.136/2,.136/2+.13)
bar+=reflect_x(bar)
bar+=reflect_y(bar)
bar-=c2
# rod_align
if long==True:
rod_align=rod+outer+bar
else: rod_align=rod+outer
rod_align=rotate(rod_align,angle)
rod_align=move(rod_align,x,y)
return rod_align
#
# CUSTOM SHAPE NEMA 17 MOUNT IN INCHES
#
def nema17 (x0,y0,angle=0):
c1=circle (0,0,12/25.4)
c17=circle(15.5/25.4,15.5/25.4,1.5/25.4)
c17=c17+reflect_x(c17)
c17=c17+reflect_y(c17)
c23=circle(23.57/25.4,23.57/25.4,2.5/25.4)
c23=c23+reflect_x(c23)
c23=c23+reflect_y(c23)
m=c1+c17
m=rotate(m,angle)
m=move(m,x0,y0)
m.shape=True
return m
#
# MTM Snap male tab
#
'''
Based on the snap.dxf file from http://mtm.cba.mit.edu/machines/mtm_snap-lock/index.html
Ported to kokopelli by Francisco. Fab Academy 2013
all units in incles, angles in degrees
'''
def tri_rect(x0,y0,length,height): # Define a triangle rectangle
if length>0 and height>0:
tri=triangle(0,0,-length,0,0,height)
tri=reflect_x(tri)
tri=move(tri,x0,y0)
return tri
elif length<0 and height<0:
tri=triangle(0,0,-length,0,0,height)
tri=reflect_x(tri)
tri=move(tri,x0,y0)
else:
tri=triangle(0,0,length,0,0,height)
tri=move(tri,x0,y0)
return tri
def rect(x0,y0,width,height): #Easier for imput than the standard rectangle
r=rectangle(0,width,0,height)
r=move(r,x0,y0)
return r
def tip(x0,y0): # the weird shape of the tab tip
r1=rect(0,0,0.29,0.05)
r2=rect(0,0.05,0.29+0.06,0.0375)
t1=tri_rect(0.29,0.05,0.06,-0.05)
c1=circle(0.0625,0.05+0.0375,0.0625)
r3=rect(0.0625,0.05+0.0375,0.1458,0.0625)
r4=rect(0.2083,0.0875,0.1417,0.0301)
t2=tri_rect(0.1458+0.0625,0.05+0.0375+0.0301,0.1417,0.0313)
r=r1+r2+t1+c1+r3+r4+t2
r=move(r,x0,y0)
return r
def tab_male(part,x0,y0,central_width=0.5,angle=0):
if central_width<0.2: central_width=0.2 # minimum tab width
# side tab with the long hole inside
r1=rect(0,0,0.29,1.75*material_thickness)
tp=tip(0,1.75*material_thickness-0.05)
r2=rect(0.08,.13/2,0.13,1.75*0.65*material_thickness-.13/2)
cirbit1=circle(.08+.13/2,1.75*0.65*material_thickness,.13/2)
cirbit2=circle(.08+.13/2,.13/2,.13/2)
cirbit3=circle(-.13/2,.13/2,.13/2)
cirbit4=circle(.29+.13/2,.13/2,.13/2)
rec3=rect(-.13,0,.13,.13/2)
rec4=rect(.29,0,.13,.13/2)
tab=r1+tp-r2-cirbit1-cirbit2+rec3-cirbit3+rec4-cirbit4
tab=move(tab,0.26+central_width/2,0)
# middle center tab
r3=rect(0,0,.13+central_width/2,material_thickness*0.75)
r4=rect(0,0,central_width/2,1.75*material_thickness+0.1)
t1=tri_rect(central_width/2,1.75*material_thickness+0.1,-0.0625,-0.0625)
c1=circle(0.0442+central_width/2,0.0442+0.75*material_thickness,0.0625)
tab=tab+r3+r4-t1-c1
tab+=reflect_x(tab)
tab=move(tab,0,-.75*material_thickness)
tab=rotate(tab,angle)
tab=move(tab,x0,y0) # moves the tab to the perimeter point
# cut a rectangle slot in the destination part
r5=rectangle(0,central_width/2+0.68,0,0.75*material_thickness)
r5+=reflect_x(r5)
r5=move(r5,0,-.75*material_thickness)
r5=rotate(r5,angle)
r5=move(r5,x0,y0)
part=part-r5
# add the tab in the destination part
part=part+tab
return part
def dogboned_rectangle(width,height,r):
rect = rectangle(-.5*width,.5*width,-.5*height,.5*height)
db = circle(.5*width-.70711*r,.5*height-.70711*r,r) # 0.70711 is sqrt(2)/2
db += reflect_x(db)
db += reflect_y(db)
return rect+db
def tab_female (x0,y0,central_width, angle=0):
if central_width<0.2: central_width=0.2 # minimum tab width
central=dogboned_rectangle(central_width,material_thickness,0.5*bit)
sides= dogboned_rectangle(.4,material_thickness,0.5*bit)
sides=move(sides,.5*central_width+.33,0)
sides += reflect_x(sides)
tab_female=central+sides
tab_female=rotate(tab_female,angle)
tab_female=move(tab_female,x0,y0)
return tab_female
# draw rods holes
support3= rectangle(-.8,.8,-0.7,1.8)
c=rod_align(0,0,rod38dia,45,False)
d=rod_align(0,1,rod12dia,0,True)
rods=support3-c-d
#############################
# Machine design starts here!
#############################
#######################
# bed
#######################
#bed top
bed_tabwtop=.2
bed_tabwside=.7
rod_distance=.37*bed_w
bed_top=rectangle(0,bed_w,0,bed_h)
bed_top=tab_male(bed_top,bed_w,bed_h/2.,bed_tabwside,-90) #right
bed_top=tab_male(bed_top,0,bed_h/2.,bed_tabwside,90) #left
bed_top=tab_male(bed_top,bed_w/3.,bed_h,bed_tabwtop,0) #topleft
bed_top=tab_male(bed_top,2*bed_w/3.,bed_h,bed_tabwtop,0) #topright
bed_top=tab_male(bed_top,bed_w/3.,0,bed_tabwtop,180) #bottomleft
bed_top=tab_male(bed_top,2*bed_w/3.,0,bed_tabwtop,180) #bottomright
bed_top=move(bed_top,-bed_w/2.,-bed_h/2.)
#bed right part
bed_right=rectangle(0,bed_t,0,bed_h)
bed_right=tab_male(bed_right,bed_t/2.,bed_h,bed_tabwtop,0) #top
bed_right=tab_male(bed_right,bed_t/2.,0,bed_tabwtop,180) #bottom
bed_right-=tab_female(material_thickness,bed_h/2.,bed_tabwside,90)
bed_right=move(bed_right,0,-bed_h/2.)
#bed left part
bed_left=reflect_x(bed_right)
#bed top part
bed_sidetop=rectangle(0,(bed_w+3*material_thickness)/2,0,bed_t)
bed_sidetop-=tab_female(-2*material_thickness+bed_w/3.,material_thickness,bed_tabwtop,0) #topleft
bed_sidetop-=tab_female(bed_w/2+material_thickness/2,bed_t/2.,bed_tabwtop,90) #left
bed_sidetop-=rod_align(rod_distance,2*bed_t/3.,rod12dia,90,True) #left rod
bed_sidetop+=reflect_x(bed_sidetop)
#bed bottom part
bed_sidebottom=reflect_y(bed_sidetop)
#arrange the parts
if output=="bed":
bed_sidetop=move(bed_sidetop,0,bed_h/2.+.9)
bed_right=move(bed_right,bed_w/2.+.9,-bed_h/2.)
fullbed=bed_sidetop+bed_sidebottom+bed_left+bed_right+bed_top
if output=="all":
bed_sidetop=move(bed_sidetop,0,bed_h/2.+.9)
bed_right=move(bed_right,bed_w/2.+.9,-bed_h/2.)
fullbed=move(fullbed,machineX+4,machineY+2)
if output=="assembled":
bed_top=extrusion(bed_top,-material_thickness/2,material_thickness/2)
bed_sidetop=extrusion(bed_sidetop,0,material_thickness)
bed_sidetop=rotate_x(bed_sidetop,-90)
bed_sidetop=move(bed_sidetop,0,bed_h/2,material_thickness)
bed_sidebottom=extrusion(bed_sidebottom,0,material_thickness)
bed_sidebottom=rotate_x(bed_sidebottom,90)
bed_sidebottom=move(bed_sidebottom,0,-bed_h/2,material_thickness)
bed_right=extrusion(bed_right,0,material_thickness)
bed_right=rotate_y(bed_right,-90)
bed_right=move(bed_right,bed_w/2,0,material_thickness)
bed_left=extrusion(bed_left,0,material_thickness)
bed_left=rotate_y(bed_left,90)
bed_left=move(bed_left,-bed_w/2,0,material_thickness)
fullbed=bed_top+bed_sidetop+bed_sidebottom+bed_right+bed_left
fullbed=move(fullbed,0,0,1.75)
################
# machine bottom
################
r1=rounded_rectangle(0,machineX+2.5-material_thickness,0,machineY+2.5-material_thickness,.2)
r1=move(r1,-(machineX+2.5-material_thickness)/2,-(machineY+2.5-material_thickness)/2)
r2=rounded_rectangle(0,machineX-2-material_thickness,0,machineY-2-material_thickness,.2)
r2=move(r2,-(machineX-2-material_thickness)/2,-(machineY-2-material_thickness)/2)
mbottom=r1-r2
mbottom_tabx=tab_female((machineX-material_thickness)/2,0,0.7,90)
mbottom_tabx+=reflect_x(mbottom_tabx)
mbottom-=mbottom_tabx
mbottom_taby=tab_female(rod_distance,(machineY-material_thickness)/2,0.85,0)
mbottom_taby+=reflect_x(mbottom_taby)
mbottom_taby+=reflect_y(mbottom_taby)
mbottom-=mbottom_taby
if output=="assembled":
mbottom=extrusion(mbottom,-material_thickness,0)
###############
# machine front
###############
mfront=rounded_rectangle(0,machineX+1,0,machineZ,.2)
mfront+=rectangle(0,machineX+1,0,.2*machineZ)
mfront=move(mfront,-(machineX+1)/2,-machineZ/2)
front_window=rounded_rectangle(0,machineX-2*material_thickness-2,0,machineZ/2,.2)
front_window=move(front_window,-(machineX-2*material_thickness-2)/2,-(machineZ/2)/2)
mfront-=front_window
mfront=tab_male(mfront,rod_distance,-machineZ/2,.85,180)
mfront=tab_male(mfront,-rod_distance,-machineZ/2,.85,180)
mfront_tfem=tab_female((machineX-material_thickness)/2,0,.2,90)
mfront_tfem+=reflect_x(mfront_tfem)
mfront_tfem+=move(mfront_tfem,0,machineZ/3)
mfront_tfem+=reflect_y(mfront_tfem)
mfront-=mfront_tfem
mfront-=rod_align(rod_distance,-machineZ/2+.9,.5,0,True)
mfront-=rod_align(-rod_distance,-machineZ/2+.9,.5,0,True)
mfront-=circle(0,-machineZ/2+.9,.4375/2)
mfront-=nema17(0,-machineZ/2+.9)
if output=="all":
mfront=move(mfront,0,machineY+2)
if output=="assembled":
mfront=move(mfront,0,machineZ/2)
mfront=extrusion(mfront,-material_thickness,0)
mfront=rotate_x(mfront,90)
mfront=move(mfront,0,-machineY/2)
##############
# machine back
##############
mback=reflect_y(mfront)
###############
# machine right
###############
mright=rectangle(0,machineY-2*material_thickness,0,machineZ)
mright=move(mright,-(machineY-2*material_thickness)/2,0)
mright=tab_male(mright,0,0,.7,180)
mright=move(mright,0,-machineZ/2)
mright=tab_male(mright,machineY/2-material_thickness,0,.2,-90)
mright=tab_male(mright,-machineY/2+material_thickness,0,.2,90)
window_right=rounded_rectangle(0,machineZ/2,0,machineZ/2,.2)
window_right=move(window_right,-machineZ/8,-machineZ/4)
mright-=window_right
mright=tab_male(mright,machineY/2-material_thickness,machineZ/3,.2,-90)
mright=tab_male(mright,machineY/2-material_thickness,-machineZ/3,.2,-90)
mright=tab_male(mright,-machineY/2+material_thickness,machineZ/3,.2,90)
mright=tab_male(mright,-machineY/2+material_thickness,-machineZ/3,.2,90)
mright=rotate(mright,-90)
if output=="all":
mright=move(mright,machineY+2,0)
if output=="assembled":
mright=move(mright,machineZ/2,0)
mright=extrusion(mright,0,material_thickness)
mright=rotate_y(mright,90)
mright=move(mright,machineX/2,0)
##############
# machine left
##############
mleft=reflect_x(mright)
###################################################################
###################################################################
if output=="assembled":
cad.shapes = color(mleft,'red'), color(mright,'red'), color(mback,'yellow'),color(mfront,'yellow'), color(mbottom,'teal'), color(fullbed,'green')
elif output=="all":
cad.shapes = color(mleft,'red'), color(mright,'red'), color(mback,'yellow'),color(mfront,'yellow'), color(mbottom,'teal'), color(fullbed,'green')
elif output=="bed":
cad.shapes = color(fullbed,'green'),
elif output=="base":
cad.shapes = color(mbottom,'cyan'),
elif output=="left":
cad.shapes = color(mleft,'red'),
elif output=="right":
cad.shapes = color(mright,'red'),
elif output=="front":
cad.shapes = color(mfront,'yellow'),
elif output=="back":
cad.shapes = color(mback,'yellow'),