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MitsubishiRA90 4 axis Wire EDM

Machine Tool TechnologyLake Area Technical Institute

Some pictures copied from Mitsubishi

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OutlineRA90 Overview - Slide 3 Control Buttons and Lights Jogging the machine Rethreading the wire - Slide 37 Mounting Workpieces Pickups

Nozzles Flow of Machining Operations Power Settings Mitsubishi-Epacks

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Control Panel

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The 4 different axesX is the left to right

Y is front to backU is to X and moves on top left to rightV is to Y and moves on top front to back

What we program will be 2 axis programs.-We will use the taper function, which utilizes all4 axes, but 4-axis programming is VERY difficult.

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Control Buttons and Lights Pg 1

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Start upPress the Screen on/off button

To turn the screen back on

Release the emergency stop buttonThe computer is ready to be used nowTo jog the machine you must press the Ready

button.

Press the Ready button The Deionization system will startYou will be able to jog the machine or start a cut.

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1st2nd

3rd

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ShutdownPress the Emergency Stop buttonClean the water and debris offTurn off the lightClose the front coverTurn off the screen with the screen on/off button

Screen Off

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Start up from Complete Shutdown

Press POWER ON (green button located on topof the screen) NOTE: do not need to do the following

ZERO POINT RETURNlocated on the work piece setup page

Press READY button located on top right handside of the control panel

Move to LEFT REAR corner using the hand held pendant (can adjust the speed by pressing one of the 4speed keys)Work piece setup

ZERO POINT RETURNSelect all axis (when finished at the top right of the screen itwill display MOVE FN = move finished)

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Workpiece Setup Screen

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Jogging the machineOn the Handheld pendant

Press the Hand button

The speed of movement is selected at the top of the pendant.Rapid, Medium, 0.0005, 0.0001

Press and hold one of the 4 bottom buttons -X, +Y, -Y, +X

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Hand Held Pendant

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RapidMedium 0.0005

0.0001

Edge Find

Center Find Wire Align

ManualWire

ContactDo Not Use

Yet

Jogs the Uor V axes

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Jog Speeds

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Mounting WorkpiecesThe Bed of the RA90 is Soft Stainless steel

Dont drop parts, etc. on it! Threads do Not go through

So the screws do not hit the bottom flush cupUse paper towels to clean it

Not shop ragsIncase there are metal chips in the rags

Lay workpiece on edge and tilt downPlace a penny under the heel block

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Misc. NotesKeep clamps etc. low profile

So they do Not hit the upper guide etc.

You do not have to clamp them as good as ona milling machine.

The EDM does not apply any pressure to the

workpiece.Use stainless steel capscrews and fixturingwhen possible

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Gently pull the wire through the top wire guide.Above the top wire guide, there is a wheel with ahandle on it, USE IT to bring out more wireapproximately 2.5 feet.Then there are 2 ways of turning on the WIRECOLLECT.

Flip the toggle switch up, located at the lower part ofthe control panel.

And it will start. You should hear the vacuum sound start.

Press the S10 key NEXT and the wire collect willappear the S7 key.

The S keys are located at the bottom of the screen.

Rethreading

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PickupsWork-piece pickups

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Pickup Center of HoleSelect the Center button on the pendant

Press one of the directional axis jog buttons

This determines where to start the touch-off

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Corner Pick-upSelect the Corner-p button on the pendant

Set the followingA. Start Dist X ______B. Y ______C. Machine St. Pt. X ______D. Y ______

Measure times _1_

Stp. IN

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Edge PickupUsed to find one edges location.

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Water level Gauge

Water Level Low

Water Overfull

Correct WaterLevel

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Nozzle PositioningUpper water nozzle should be 0.010 awayfrom the top of the workpiece.

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Flow of Operations to Run a program

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Power SettingsMitsubishi-Epacks

The IP is the parameter we change.

-We reduce the IP ifWire keeps breaking

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We reduce the IP ifWire keeps breaking

We change the Epack From roughing/ finishing

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Thats IT! Any Questions?