printer.lua

local machine = {
    width = 8,
    height = 8,
    depth = 8,

    head_pos = {
     x = 0,
     y = 0,
     z = 0
    },

    motorz = peripheral.wrap("top"),
    motorx = peripheral.wrap("left"),
    motory = peripheral.wrap("back")
}
rednet.open("right")
function machine.stopMotion()
  machine.motorz.stop()
  machine.motorx.stop()
  machine.motory.stop()
end

function machine.zero()
  sleep(machine.motorx.translate(machine.width, 256))
  machine.stopMotion()
  sleep(machine.motory.translate(machine.depth, 256))
  machine.stopMotion()
  sleep(machine.motorz.translate(machine.height, 256))
  machine.stopMotion()
  machine.head_pos.x = 0
  machine.head_pos.y = 0
  machine.head_pos.z = 0
end

function machine.setX(x)
  local x_difference = machine.head_pos.x - x
  print("Moving x by " .. x_difference .. " from " .. machine.head_pos.x.." to " ..x)
  sleep(machine.motorx.translate(x_difference, 256))
  machine.stopMotion()
  machine.head_pos.x = x
end

function machine.setZ(z)
  local z_difference = machine.head_pos.z - z
  print("Moving z by ".. z_difference .. " from "..machine.head_pos.z.." to "..z)
  sleep(machine.motorz.translate(z_difference, 128))
  machine.stopMotion()
  machine.head_pos.z = z
end

function machine.setY(y)
  local y_difference = machine.head_pos.y - y
  print("Moving y by ".. y_difference .. " from " .. machine.head_pos.y.." to " .. y)
  sleep(machine.motory.translate(y_difference, 256))
  machine.stopMotion()
  machine.head_pos.y = y
end

function machine.setPos(x, y, z)
  machine.setZ(z)
  sleep(0.25)
  machine.setX(x)
  sleep(0.25)
  machine.setY(y)
end

function machine.placeBlock()
  sleep(0.5)
  rednet.broadcast("place", "3dprinter")
  while true do
    event, sender, message, protocol = os.pullEvent("rednet_message")
    if protocol == "3dprinter" and message == "placed" then
      break
    end
  end
end

machine.stopMotion()
machine.zero()

return machine