Hi Marcus, Too late to play with the machine but your point #2 raises some questions.
I did first square off the ends of the box and bring it to within 0.001" of the target size. With the rough edges scraped off I then mounted it in the mill horizontally, cut the two slots and then cut the width. And it did snap in as the last bit was cut out so tabs are a good idea. Same could be said for the other part. If it stays as a box then the tabs will keep things stable. Material is 0.125" (3.175mm) 6061 extrusion scrap. I set the total depth of cut to 4mm. When we start talking about tabs the question comes up as to how many, how far apart. How big. The CAM software (MecSoft) can do rectangular or triangular. I can specify width and height and how many or how far apart. Attached screen grab shows 6 triangular 2mm high by 4mm wide. The second shows the screen for setting it up. How does one know what size tabs and how many? John > -----Original Message----- > From: marcus.bow...@visible.eclipse.co.uk > [mailto:marcus.bow...@visible.eclipse.co.uk] > Sent: August-04-21 11:59 AM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Something went wrong. > > John, > > Two suggestions: > > 1. I have experienced the same symptoms in the past, and it turned out > to be the bolts securing my Y axis nut (which has a square flanged base) > moving under the inertial load of the table. > > 2. My approach to machining the part might be to not cut the box section > to an L section. > Square off the end of the box section. > Mount a hard endstop on the side of the vice (or clamp something on the > table) to act as a left endstop and reference. > Put the box section in the vice. > Machine the top face (for example: the face with the two elongated > holes), but leave maybe 4 tabs to hold it in position. Don't do this > right at the end of the box. > Remove the box, rotate 90 degrees, and grip again, against the endstop > and with the other_face_to_be_machined uppermost. > Machine that other face (the one with the circular cut-out), perhaps > leaving a couple of tabs to hold it in place and make sure the box > doesn't try to collapse inwards. > Remove the box and manually cut the tabs. > > Marcus > > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users
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