I have a challenge for all..... maybe.

[ChrisJ]

After reading your explanation I came to realize that I am confusing workshift with work offset. Well, maybe I am still a little confused.

So would another application for workshift (OneCNC function) be for running the same program at multiple locations on the machine table for the purpose of producing multiple parts, say for nested parts on one large piece of stock? If so, would you post the code for each workshift setting and then splice the code together into one file?

Thanks for the previous explanation.

Chris

[HuFlungDung]

Yes, you could use the workshift that way, however, you might be loosing the advantage of using the current tool as much as possible, to machine the same features at every workstation. That depends on how you like to run the job, and your level of comfort in programming.

I prefer using subroutine type programming in that circumstance. For Haas, I have a hands-free machine post set up to create such programs without any cut and paste. I say Haas, because it has an M97 local subroutine call, that other controllers may not have. This means I can tack all the processes together after the main program's M30.

So, the main program consists only of calling the new work offset, then a jump into a local subroutine which calls the new tool. As each location is machined with the current tool, it loops back to the main program, reads the next work offset and comes back into the same sub.

Oops, I guess I'm getting this thread off topic

[ChrisJ]

Well I made a video of how I created the model shown above in OneCNC but the file is 40Mb zipped. I tried uploading it but it timed out. Anyone know what the file size limit is? Maybe I can send the file to Paul or a moderator and they can upload it for me.

I realize the model is basic/simple but I thought some might be interested in how OneCNC's modeling functions work as compared to the parametric solid modelers that are out there.

Chris

[PoppaBear10]

championp,

Thank you so very much for your time in explaining that to me.
One more if I may, would you re-look at my post and tell me what the model to 0.005 grind left over is about. I dont know if he is asking for 0.005 smaller than the stock, or the model or what?? I just took a guess and assumed (yea I know dont assume), that the model he put up was the "finished part", and that we should have added some stock to the CAM program, but it confused me since the measurements are about the same as the bar stock......or am I totally lost here?.......

S.

[ChrisJ]

I was able to upload the video to a free hosting site.

You can download the video from the link below if you are interested:

Block_Video

Chris

[Cncjunkie]

it took me about 40 mins in eprit to do. Did it out of soild and drew in a crude vice for simulation. Could be done faster in esprit by somebody with better esprits' skills. One nice thing about esprit is you can do reports. Tells tool geo, cycle order, run time per cycle, feeds , speeds, wc per tool. I sure the other cad/cam software have this too

[championp]

poppa,
Your assumption is correct. if the print says 2.0" then you would cut it to 2.005" me personally I leave .005 on all sides before grinding so I would cut it to 2.010" because I have had parts warp from .0001 flatness to .006". On a rectangular flat block like this one it shouldn't warp as much as one with say a large pocket or boss on one side.


I will try to program this part this weekend if I get the chance. My personal approach is to touch off all the tools to the top of the part. touch off all four sides to get center of the part for x0y0. then drop my z offset enough to clean up the top with the face mill, profile and finish around all four sides, then run the drills and counter bores. Flip the part over (around the y axis 180 degrees) measure the thickness and drop the z again to face to thickness.
So as far as making the square, it's done as the part is being cut. It's not always the best for production runs, but most of the tool and die work I do is one part at a time. Very much like murrays approach, I change the z offset to get my dimensions right. Only I keep changing the same offset, but only in the z (my machine uses H1, H2, instead of g54, g55 etc.)

[REVCAM_Bob]

Originally Posted by PoppaBear10 Hey, Note: I don't know what PLCS or Jack screws, or SHCS is, still dont, but I just was able to knock off about 10-15 minutes doing the CAD in Rhino just because I have used it much longer. There are some things that I didnt understand on the part requirements. You didnt put the final size of the block. I know the stock is starting with 2x4 inches, and 5inches in length. I didnt understand what you meant buy leaving grind stock on the all the sides??? does that mean instead of 2" thick by 4" thick you would want it 1.990 x 3.990 x 5.005?? if so, then it took me about 20 minutes using Rhino for the CAD, and about 33 minutes in pure onecnc. BTW: the two holes roughly in the middle the diameter was not given, I guess they are 3/16? What is a EDM start hole? (sorry for the questions, but I am unfimaliar with the above listed abbreviations, I thought EDM was a solid electrode machining type???) s

plcs stands for places i.e. 4 places etc.

Jack screws are just threads in the bottom of a block and the top is drilled out to a clearance size so a bolt can be screwed all the way thru the block
to "jack" if off the dowels.

With 0.005 grind stock per side the finished block size after milling would be
1.970 x 3.860 x 5.010

Edm work is wire edm which is similar but quite different from conventional edm.

[Geof]

"The requirments didn't say you where limited to 3axis, so I did it on 5 to speed up the whole machining process"

I will agree it might be possible to speed up the programming process doing this but you would need a very magic way of holding the piece to machine all the sides using a single fixturing. The part has to be held in a vise and flipped to get at all sides so what is the point of using a five axis machine.

[Andy NC]

Testing the individual user is not an indication of the CAD CAM capability.

How many would turn up at your premises, without seeing the drawing detail and commit to cutting the part, same day, right first time, using NC code format similar to your manual methods, on any CNC control accepting ISO format code.

I would - and I am an AlphaCAM salesman.

Andy NC

[lakeside]

Originally Posted by Andy NC Testing the individual user is not an indication of the CAD CAM capability. Andy NC

this test only show the person skill as a programmer any software could program this part that why I did not waste a lot of time on this test.After all it's 3d work that trips up most people. Wireframe programming most people understand. It programming from a solid that people have trouble with and it only becase they have not had to do it. Programming is not black magic.

[PoppaBear10]

Geof:

simple, the stock block would be tall enough to be held in a vice, (with entire part that comes out of the stock above the vice).