CNC Mill Tutorial



How to Set up a Cnc Milling Machine

There are many factors that have to be addressed before this question can be properly answered. Is the machine a vertical or horizontal machine? How any axes will be required? What is the capacity of the tool turret? How are you planning on holding the part? Assuming the programmer has answered these questions for you, lets proceed. Although every CNC milling machine set up will be slightly different, these are the generic steps I follow on a daily basis for a 3 axis vertical CNC milling machine.Note: I am assuming you know some basic machining practices. For example, how to use an edge finder, how to navigate through your machine's control, and knowledge of basic CNC control commands.

Steps

  1. Clean all surfaces, for example table, vise jaws and part very good with a lint free cloth.
  2. Load tools needed.(including edge finder)
  3. Load part in vise or however your work holding is going to be.
  4. Set work fixture offsets.Make sure the machine is using the WFO that the program will be using. If not, switch to MDI mode, type in G54, or G55, or G54.1P15, what ever the program will be using. Hit Cycle Start. Using an edge finder, pick up the X0. position the programmer had previously established. Go to your WFO page and add the machines absolute X value to the value currently in the WFO's X registry. Do the same for the Y axis.
  5. Set the tool length offset for each tool by loading first tool in spindle.Manually move the Z axis down until the tool's tip is near the Z0. position the programmer had previously established. Get a piece of 0.001" shim stock and hold it between the part and the tip of the tool. Carefully and lower the Z axis in 0.0001" increments until the shim stock can be pulled with a slight drag. Go to your tool length offset page and enter the machine's absolute Z value plus -0.001 in the tools registry. Repeat procedure to additional tools. Note: -0.001 is added for the shim stock's thickness.
  6. Enter any diameter offsets that may need to be entered if tool radius compensation will be used in the tool offset page.
  7. Adjust coolant lines so coolant can properly cool tools and wash chips away.
  8. Put machine in slow rapid, Single Block and then press Cycle Start.Be careful and read every block programmed and watch each movement the machine makes ready to stop the machine in case there are any programming errors. (You could also run the program 5" or whatever above the part to make sure every thing is good and use Dry Run if you feel it necessary.)

Community Q&A

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  • Question
    In CNC milling how much set up time is needed in 24 hours?
    wikiHow Contributor
    Community Answer
    It depends on cycle times, how many parts you are making in a run and whether or not you are having to program or the customer has supplied the basic dimensional parameters for the completed part. There may be other considerations as well, such as cleaning and simple daily maintenance.
    Thanks!
Unanswered Questions
  • What is the tool setup for CNC milling and turning?
  • What are the steps for cutting the T slot milling machine?
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Date: 04.12.2018, 21:53 / Views: 35582