Class: SolidRuby::Assemblies::Nut

Inherits:
Assembly show all
Defined in:
lib/solidruby/assemblies/nut.rb

Instance Attribute Summary collapse

Attributes inherited from Assembly

#hardware, #skip, #transformations, #x, #y, #z

Attributes inherited from SolidRubyObject

#attributes, #children, #siblings, #transformations

Instance Method Summary collapse

Methods inherited from Assembly

#*, #+, #-, #add_to_bom, #color, #colorize, get_skip, get_views, #part, #scad_output, #show_hardware, skip, #threads, #transform, view, #walk_tree

Methods inherited from SolidRubyObject

#&, alias_attr, #debug, #debug?, #mirror, #place, #rotate, #rotate_around, #save, #scale, #to_rubyscad, #translate, #union, #walk_tree, #walk_tree_classes

Constructor Details

#initialize(size, args = {}) ⇒ Nut

Returns a new instance of Nut.



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# File 'lib/solidruby/assemblies/nut.rb', line 19

def initialize(size, args = {})
  @size = size
  @type = args[:type] ||= '934'
  @material = args[:material] ||= '8.8'
  @surface = args[:surface] ||= 'zinc plated'
  @support = args[:support] ||= false
  @support_layer_height = args[:support_layer_height] ||= 0.2
  @margin = args[:margin] ||= 0.3 # default output margin

  @slot = args[:slot] || nil
  @slot_margin = args[:slot_margin] || 0.5
  @slot_direction = args[:slot_direction] || 'z'
  @cylinder_length = args[:cylinder_length] || 0	# for slot only

  @transformations ||= []
  @args = args
  prepare_data
  @height = args[:height] || @height

  @direction = args[:direction] || @slot_direction

  @bolt = nil
  super(args)
end

Instance Attribute Details

#height ⇒ Object

Returns the value of attribute height.



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# File 'lib/solidruby/assemblies/nut.rb', line 18

def height
  @height
end

Instance Method Details

#add_support(layer_height = @support_layer_height) ⇒ Object 



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# File 'lib/solidruby/assemblies/nut.rb', line 98

def add_support(layer_height = @support_layer_height)
  res = cylinder(d: @support_diameter, h: @height - layer_height)
  # on very small nuts, add a support base of one layer height, so the support won't fall over
  res += cylinder(d:@s-1,h:layer_height) if @size < 6
  res
end

#bolt(length = nil, args = {}) ⇒ Object 



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# File 'lib/solidruby/assemblies/nut.rb', line 48

def bolt(length = nil, args = {})
  return @bolt if @bolt
  @bolt = Bolt.new(@size, length, args)
  case @direction
  when 'z'
    bolt.transformations << Rotate.new(x: 180)
    bolt.transformations << Translate.new(z: length)
  when '-z'
    bolt.transformations << Translate.new(z: -length + @height)
  when '-x'
    bolt.transformations << Rotate.new(x: 180)
    bolt.transformations << Translate.new(z: length)
  when 'x'
    bolt.transformations << Translate.new(z: -length + @height)
  when '-y'
    bolt.transformations << Rotate.new(x: 180)
    bolt.transformations << Translate.new(z: length)
  when 'y'
    bolt.transformations << Translate.new(z: -length + @height)
  end
  @bolt.transformations += transformations.dup

  @bolt
end

#description ⇒ Object 



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# File 'lib/solidruby/assemblies/nut.rb', line 44

def description
  "M#{@size} Nut, DIN #{@type}, #{@material} #{@surface}"
end

#nut_934(show = true, margin = 0, height_margin = 0) ⇒ Object 



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# File 'lib/solidruby/assemblies/nut.rb', line 144

def nut_934(show = true, margin = 0, height_margin = 0)
  @s += margin

  res = cylinder(d: (@s / Math.sqrt(3)) * 2, h: @height + height_margin, fn: 6)
  res -= cylinder(d: @size, h: @height) if show == true
  res -= add_support if @support
  res.color('Gainsboro')
end

#output ⇒ Object 



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# File 'lib/solidruby/assemblies/nut.rb', line 130

def output
  add_to_bom
  if @slot.nil?
    return transform(nut_934(false, @margin))
  else
    return transform(slot)
  end
end

#prepare_data ⇒ Object 



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# File 'lib/solidruby/assemblies/nut.rb', line 73

def prepare_data
  chart_934 = {
    2.5 => { side_to_side: 5, height: 2, support_diameter: 2.8 },
    3 => { side_to_side: 5.5, height: 2.4, support_diameter: 3.5 },
    4 => { side_to_side: 7, height: 3.2, support_diameter: 4.4 },
    5 => { side_to_side: 8, height: 4, support_diameter: 5.3 },
    6 => { side_to_side: 10, height: 5, support_diameter: 6.3 },
    8 => { side_to_side: 13, height: 6.5, support_diameter: 8.3 },
    10 => { side_to_side: 17, height: 8, support_diameter: 10.3 },
    12 => { side_to_side: 19, height: 10, support_diameter: 12.3 }
  }
  # for securing nuts
  chart_985 = {
    3 => { height: 4 },
    4 => { height: 5 },
    5 => { height: 5 },
    6 => { height: 6 }
  }

  @s = chart_934[@size][:side_to_side]
  @height = chart_934[@size][:height]
  @support_diameter = chart_934[@size][:support_diameter]
  @height = chart_985[@size][:height] if @type == "985"
end

#show ⇒ Object 



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# File 'lib/solidruby/assemblies/nut.rb', line 139

def show
  add_to_bom
  transform(nut_934)
end

#slot ⇒ Object 



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# File 'lib/solidruby/assemblies/nut.rb', line 105

def slot
  case @slot_direction
  when 'x'
    pos = { x: @slot }
  when 'y'
    pos = { y: @slot }
  when 'z'
    pos = { z: @slot }
  when '-x'
    pos = { x: -@slot }
  when '-y'
    pos = { y: -@slot }
  when '-z'
    pos = { z: -@slot }
  else
    raise "Invalid slot direction #{@slot_direction}"
  end
  res = hull(
    nut_934(false, @margin, @slot_margin),
    nut_934(false, @margin, @slot_margin).translate(pos)
  )
  res += cylinder(d:@size+@margin,h:@cylinder_length) if @cylinder_length > 0
  res
end