9 - Multiple Fixture Documents Metric Supplement, CNC, CAM, featurecam

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//-->Multiple Fixture DocumentsMultiple FixtureDocumentsIntroductionFeatureCAMallows the user to program multiple parts or multiple instances of thesame part within a single part called a Multiple Fixture (mf) document. Thesedocuments are for milling parts that have already been created and saved inindividual fm files. The parts can be arranged relative to a single Setup, or they caneach have their own individual fixture positions. They can also be machined from asingle stock model or from individual stock pieces.Since complete parts are loaded into Multiple Fixture documents, they cannot beedited within the Multiple Fixture environment. They must be changed in the fmfiles and then manually reloaded into the mf file.This chapter will describe the process for loading parts into Multiple Fixturedocuments.Getting StartedIn order to begin programming a part, the Multiple Fixture option must be selectedfrom the New Part Document wizard.Multiple Fixture InterfaceThe user interface for Multiple Fixtures is slightly different from the typical fm file.You will notice that many functions are dimmed or completely unavailable. Again,this is because the purpose of the Multiple Fixture document is to collect andarrange multiple parts into a single file – it is not for creating features of any type ormaking changes to existing parts. So, any functions related to creating toolpath willnot be available.StepsThe Steps mode of the Toolbox is open by default (Part View is not available at anytime), and it is quite simple. The only entries that are unique to the mf file areFixture ID and Parts. The rest of the options operate exactly as they do in anyother FeatureCAM file.10.1Copyright @ Delcam.PLCMultiple Fixture DocumentsFixture IDThe Fixture ID step allows the user to define and locate established fixture locations.Those locations can later be used to anchor single or multiple parts.PartsThe Parts step is the Wizard that is used to build and edit the part layout. It allowsthe user to add, delete, and edit all of the part configurations in the file.Remember, the parts themselves cannot be edited in the Multiple Fixtureenvironment. We will discuss making changes later on in this chapter.The following examples will examine how Multiple Fixture files can be programmed:Example 1 - Multiple Parts as Separate BlocksFor this example, we will use the Caliper part that is found in the FeatureCAMExamples folder. This part has two setups – a top setup and a bottom setup. Wewill use this to create a row of tops and a row of bottoms. This will depict ascenario where you have parts that you are rotating through fixtures on themachine. For each cycle, you will be adding a set of material blanks and removing aset of complete parts.The first step for creating a Multiple Fixture file is to add parts that youwant to machine to the Parts List.1Make sure the Parts step is active, and selectParts Listfrom the buttons alongthe right edge of the dialog box2When thePart Fileswindow opens, clickBrowseand navigate to theDatafolderCopyright @ Delcam.PLC10.2Multiple Fixture Documents3Select the filePockets with Islands Example+Milling + side.fm(Seelocation)45ClickOKThen selectAdd10.3Copyright @ Delcam.PLCMultiple Fixture Documents6ClickNext.Notice that there is also a field where you can name the Multiple Fixturefile. This is the name that will appear in the NC code, if desired.The next screen allows the user to select a starting offset for the parts.Since we will be cutting our parts from separate fixture offsets in thisexample, this dialog will determine the beginning offset, and other offsetswill be added incrementally as we add parts.7Accept54as the initial offset by clickingNextCopyright @ Delcam.PLC10.4Multiple Fixture DocumentsThe next screen in the wizard defines how this part will be arranged. The XYZlocation is the position of the first setup, and the other boxes determine thenumber and spacing of the repeats. Since these are repeats, a value of 3 willgive us 4 instances. FeatureCAM fills in the spacing automatically by adding aset distance to the part’s stock size, but this can be overridden to any value theuser wants. Note: When using separate blocks of stock, the spacing is forsimulation purposes only. The actual offset positions will have to be determinedat the machine and entered into the control registers.Fill out the Configuration dialog box as shownClickNext8910Select Individual Blocks and clickNext10.5Copyright @ Delcam.PLC [ Pobierz całość w formacie PDF ]

9 - Multiple Fixture Documents Metric Supplement, CNC, CAM, featurecam

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