3Module ObjectivesDescribe the main parts of the EMCO CNC turning machine.Operate the EMCO CNC turning machine.Identify the main reference points on the EMCO CNC turning machine.Distinguish the main control keys and their functions.Run the spindle of the Emco machine to a specific speed.Reference the machine in X and Z.Select the proper mode to move the tool turret in X and Z.Set the required tool in the active position.Decrease/Increase the feed rate in a specific percentage.
9Points on the CNC Machine Machine Zero PointWork piece Zero PointTool Holder Zero PointReference Zero Point
10Machine Zero pointIt lies in the rotary axis at the front of the spindle nose. The machine zero point is the origin of the coordinate system. It is set by the manufacturer and cannot be changed.
11Reference Zero pointThe reference point is a fixed point on the machine. It serves for the calibration of the measuring system. The reference point MUST be approached after each switch on of the machine to communicate the exact distance between the points (M) and (N (T)) to the control.
12Work piece Zero pointThe workpiece zero point can be freely programmed by the user. By programming a workpiece zero point, the origin of the coordinate system is displaced from the machine zero point into the workpiece zero point.
13Tool holding fixture (N): The tool holding fixture reference point lies on the face of the tool holder (turret) as shown in the illustrated Figure.
15To switch the machine ON: - Open air supplySwitch on the main switch at the E-cabinet- Turn on the PC- Launch Control Software- Open and close the chip guard door once for checking the door safety switch
16To switch the machine OFF: - Terminate control software- Terminate WindowsSwitch off main switch- Lock air supply
18Machine control keyboard: Machine control keyboard of the EMCO PC-Turn Series
19Machine control keyboard of the EMCO PC-Turn Series Skip blocks will not be executed
20Machine control keyboard of the EMCO PC-Turn Series Test run of programs, in which the program will run while the spindle is not rotating and there is no workpiece in the clamping device.
21Machine control keyboard of the EMCO PC-Turn Series Reset
22Machine control keyboard of the EMCO PC-Turn Series Stop the program
23Machine control keyboard of the EMCO PC-Turn Series Start the program
24Machine control keyboard of the EMCO PC-Turn Series Manual axis direction movement
25Machine control keyboard of the EMCO PC-Turn Series Approaching the reference point in all axes
26Machine control keyboard of the EMCO PC-Turn Series Open / Close door
27Machine control keyboard of the EMCO PC-Turn Series Open / Close clamping device
28Machine control keyboard of the EMCO PC-Turn Series Swivel tool turret
29Machine control keyboard of the EMCO PC-Turn Series Coolant/ Puff Blowing On / Off
30Machine control keyboard of the EMCO PC-Turn Series Spindle speed override (increase or decrease the spindle speed)
31Machine control keyboard of the EMCO PC-Turn Series Feed override switch (increase or decrease the feed rate)
32Machine control keyboard of the EMCO PC-Turn Series Mode selector provides several operating modes : REF, MEM, EDIT, MDI, JOG, and INC mode
33Machine control keyboard of the EMCO PC-Turn Series REF: Referencing Manual referencing - Press the –Z or +Z key: the slide traverses to the reference point in Z. - Press the -X or +X key: the slide traverses to the reference point in X.
34Machine control keyboard of the EMCO PC-Turn Series REF: Referencing Automatic referencing: - Select REF Mode: - Press the reference key : The slides traverse to the reference point in both axis, one after the other.
35Machine control keyboard of the EMCO PC-Turn Series MEM (Memory Mode): To run the program in automatic mode.
36Machine control keyboard of the EMCO PC-Turn Series EDIT: Allows the addition, modification, and deletion of programs.
37Machine control keyboard of the EMCO PC-Turn Series MDI: (Manual Data Input): Is used when the user wishes to manually input program commands into the system. The programs are typed directly into the system via MDI keypad.
38To run the spindle at 1000 RPM in clockwise direction ExamplesTo run the spindle at 1000 RPM in clockwise direction
39Example solutionClose the door Select MDI mode Press the [PROG] from function keys Use Data Input Keys to write the following block: S1000 M3 (then press INPUT key) Press Start Press reset to stop the program
40Example solution Press POS JOG: In this mode the slides can be moved in one axis at a time by use of the Axis Direction Keys.INC (Incremental): In this mode the slides can be moved certain distances in micron.
41NotesThe machine is switched off by means of the main switch. It is recommended to switch off the machine only in inoperative position of the tool turret. Operation is interrupted by means of the reset key. All current machine functions are interrupted with RESET.
43Function KeysFunction Keys enable the user to know the current positions of the tool, deal with programs, make the necessary setting e.g workpiece and tool settings, control program simulation, .… etc.
46Machine Practical Tasks (Before performing these tasks, the tools on the turret should be checked for any expected collision with the chuck)
47Machine Task 1 Select Reference mode (door closed/Chuck closed) Reference the machine in XReference the machine in ZOpen the doorClose the doorOpen / close the chuckSelect “JOG” modeIncrease the feed rate to 110% (Use feed rate override)Decrease the feed rate to 90%Move the turret in positive Z
48Machine Task 1Check the tools on the turret for any expected collision, then Rotatethe turret to make tool number 5 active.Decrease the feed rate to 20%Move the turret in negative ZIncrease the feed rate to 100%Move the turret in positive ZMove the turret in negative XMove the turret in positive X
49Machine Task 1 Switch coolant (air) ON Switch coolant OFF Select reference mode“press automatic referencing button”
51Machine Task 2 Select JOG mode Move the turret in positive Z Adjust the feed rate to 80%Move the turret in negative ZMove the turret in positive XMove the turret in negative XSelect MDI mode (While door is closed)On (Function Keys), Press “Program”Use the (The data input keys) to write “S1500 M3” then press “INPUT”
52Machine Task 2 Press “Start program” Increase the speed to 120% Decrease the speed to 80%Set speed to 1000 RPM (100%)Stop the program (Reset)Press POSSelect Jog modeMove the turret in positive ZSelect MDI mode (While door is closed)On (Function Keys), Press “Program”
53Machine Task 2Write T0303, then press INPUT (Check the turret for any possible tool collision with the chuck)start the programStop the program (Reset)Select tool no.7 to be the active tool, then press “reset”Press POS.Select Reference modeReference the machine in XReference the machine in Z”
55MTS Tasks 1Use MTS software to create a setup sheet and write a part program to do the finishing part shown below. It is advised to consider the depth of cut = 1 mm, this means the reduction of diameter from 40 to 30 mm will be done through 5 steps of cutting. The diameter will be reduced to 38, 36, 34, 32 and finally to 30 mm).