my robot cant break blocks anymore

[zeek6728 0]

I made my first tier 3 robot and I gave it the same program that I gave to my other but i change the program so it will repeat if an object is still in front of it
i give it the same tool for mining like i always have a Diamond Drill from industrialcraft
but it just swing at the Block doing the little puff of smoke animation without breaking the block i even gave it a normal pick
I tried to pick it up and put it back down but it's the same thing I even restarted the world
 

in case it's my programming that is wrong here's my script

local robot = require("robot")
local component = require("component")
local g = component.generator


local x = 0

function dig()
  
  repeat
    if g.count() < 10 and robot.count(2) > 1 then
      robot.select(2)
      g.insert(1)
      robot.select(1)
    end
    if robot.detectUp == true then
      repeat
        robot.swingUp()
        os.sleep(1)
      until(robot.detectUp == false)
    end
    if robot.detect == true then
      repeat
        robot.swing()
        os.sleep(1)
      until(robot.detect == false)
    end
    robot.forward()
    if robot.detectDown() == false then
      robot.placeDown()
    end
    x = x + 1
  until(robot.durability() == 0 or robot.count(robot.inventorySize()) > 0)
  robot.turnAround()
  repeat
    robot.swing()
    robot.forward()
    x = x - 1
  until(x == 0)
  
  repeat
    os.sleep(1)
  until(robot.durability() > 0 and robot.count(robot.inventorySize()) == 0)
  robot.turnLeft()
  for i = 0,2 do
    if robot.detectUp == true then
      repeat
        robot.swingUp()
        os.sleep(1)
      until(robot.detectUp == false)
    end
    if robot.detect == true then
      repeat
        robot.swing()
        os.sleep(1)
      until(robot.detect == false)
    end
    robot.forward()
    if robot.detectDown() == false then
      robot.placeDown()
    end
  end
  robot.turnLeft()
end

while(true) do
  dig()
end