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Messages - Tool-n-Around

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181
CamBam help (General usage) / Re: Still Learning. Some Recurring Issues
« on: November 19, 2021, 19:35:44 pm »
Yes it's not meant to improve your run time, bit rather to repair a line so that the CB pathing routines will work with them and not produce any errors.

Got it, hadn't appreciated that.

Sorry to hear of your potential computer woes. Hopefully you can sort that without too much trouble and thanks for the further CAMotics tips.

Best,
Kelly

182
CamBam help (General usage) / Re: Still Learning. Some Recurring Issues
« on: November 19, 2021, 03:43:42 am »
......if you run it from cambam, camo read the xml file created by the cambam plugin, if you run the simulation directly from camotics, you must load the .xml file created by the plugin, not the .nc file. If you open the .nc file, you only have the Gcode and the tools defined in Camotics, not the stock datas and the tools defined in CB. (I've no tool lib defined in Camo, only in CamBam, so you can see that only the tools used in the project are visible in the list on my picture)

I didn't appreciate the benefits of the cb CAMotics Plugin. Now Downloaded and in use! Much better. I'll get rid of the CAMotics tool libraries.

Best,
Kelly

183
CamBam help (General usage) / Re: Still Learning. Some Recurring Issues
« on: November 19, 2021, 03:09:12 am »
Thanks for those refinements. That's some additional learning and has become my new baseline file.

....For the 3D surface that return error, changing the DI to 0.00522 instead 0.005 solve the problem.

What do you make of this? What prompted you to change the DI as a possible solution to the dangerous tool path warning at layer Z25? It never woul dhave occurred to me.

....on the CAMotics issue,I wasn't consciously changing that setting and was unaware......thanks again.

Best,
Kelly

184
CamBam help (General usage) / Re: Still Learning. Some Recurring Issues
« on: November 19, 2021, 01:27:56 am »
it's better, I fall to 10 min for the 3D for one hole ;)

That looks good. I made the DI change to .00522 and changed to finish waterline 3DSurface. Total run time of 1hr 25m. I get this odd error with CAMotics wher it shows the cut not through the stock even on the ops where it previously did. Sometimes if I close CAMotics and reopen, it doesn't occur.....strange.

I'll try combination Finish MOPs later. Thank you David.

Best,
Kelly

185
CamBam help (General usage) / Re: Still Learning. Some Recurring Issues
« on: November 19, 2021, 00:37:41 am »
For the 3D surface that return error, changing the DI to 0.00522 instead 0.005 solve the problem.

Good to know but I dont understand why.

I don't understand why you do a WL rough operation (and with a ball noze) , the major part as been removed by the pocket, so you can use a finish pass only in foam I assume ... ?


Perhaps I just don't understand the op but I thought it would produce smoother cut as opposed to stairs, albiet .00522 stairs?

I'll do some Cutviewer simu to have a better view of the part before the 3D machining ...

Atatched is what it looked like without 3D work.

Best,
Kelly

186
CamBam help (General usage) / Re: Still Learning. Some Recurring Issues
« on: November 18, 2021, 23:24:24 pm »
Ok, I’m back. There is still a lot of superfluous geometry in the drawing layers which I left for experimentation so please ignore that.

I’ve been trying to clean up the 3Dsurface ops and reduce the run time.

Based upon the remarks back in post #8, I isolated the logo in to top level file and was surprised that the run time was only 7m 30s. I downloaded the File Cleaner plug in and used it on the original logo file which is a little larger in size. With no cleaning its run time was about 8m 32s. Cleaning did remove some items but it was a small number (maybe a handful) and to me it didn’t look appreciable different/better after applying the various filters. When I generated a gcode file the run time only improved about 5s. I did read the documentation. Am I not applying the file cleaner properly? I don’t consider the run time or appearance in simulation to be too bad or be much of a problem. See attached logo file.

The total run time on the top level file without the 3DSurface ops is ~35m. It can still be improved but not a lot to gain and the 3Dsurfaces were the source of the long run time. I had messed up a few things on the surface generation, boundary, and associated 3DSurface op. With nearly all the stock having been removed from previous 2D pocketing ops, I figured I could jump right to the finish cut. I am using a .125” ball end mill but even though it was mentioned this would generate long run times, it only added 6m when I applied it to the single bore file attached in post #55, so I attempted to replicate that in the attached top-level file.

While generating tool paths the file (multiple) reports detecting unsafe tool paths at Z layer 25 and will not generate gcode. Looking at the tool paths, I thought it was because it was jumping over the .125” raised boss with only a .125” clearance plane, but increasing the clearance plane does not solve the problem. What’s the source of the tool path warning and how is it correct?

Best,
Kelly

187
CamBam help (General usage) / Re: Still Learning. Some Recurring Issues
« on: November 17, 2021, 15:52:07 pm »
I haven't gone away. Just having to attend to other matters for a while.

I was reviewing this thread and what started as a simple question about editing CAD drawing sort of turned into a learning tutorial for me. I chose a real life part and tried to recreate it. That always seems to lead to a good learning experience. In the course of doing so I've learned a lot about using CB, surfaces, 3D machining, file cleaning, etc. For that I am very greatful for all that have helped. Thank you.

I created the carb opening surfaces, inserted them into the entire part file, generated the tool paths and gcode file, and ran a simulation which returned a run time of nearly 24hrs.....Arghh! But, I had made some errors that have already been discussed, was using a ball end mill for surface machining which I was already advised would drastically increase the run time, and have not yet cleaned up the Ford logo graphic, which is a mess. So first I'll work at making sure I properly incorporate all that has already been taught and let you know how I do afterward. I think I need to experiment a bit with the step over, depth increment, feeds/speeds on my machine,......but that will need to wait until I'm back on my feet.

In the mean time, I'm expecting to be able to achieve a run time in the vicinity of 2hrs or less. If not, I may be back to ask for some further help.

Just wanted to let you all know your invested time is being put to good use.

Best,
Kelly

188
CamBam help (General usage) / Re: Still Learning. Some Recurring Issues
« on: November 15, 2021, 22:06:15 pm »
Yes!

Best,
Kelly

189
CamBam help (General usage) / Re: Still Learning. Some Recurring Issues
« on: November 15, 2021, 21:30:23 pm »
I was trying to describe a region that would confine the finish 3DSurface-Finish op to just the location that needed it.......that being the revolved radius and just the portion of the leg and boss in the immediate vicinity of the interesetction with the revolved radius. It would reduce the 3DSurafce-Finish time to something less than 16 minutes and allow the entire part (the big part not just these openings) to be done with 2D pockets.

If that doesn't make sense, maybe I should just try it and report back... :)

Best,
Kelly

190
CamBam help (General usage) / Re: Still Learning. Some Recurring Issues
« on: November 15, 2021, 21:06:14 pm »
.......Note that you can use only one region per mop in contrary to polyline that can be more than one to define a boundary.

The entire part run time is 20-30min without 3D surfaces. The 3D machining~44min/hole (x4), but the finish cut is only 16 minutes. The pocket maching removes all material except the revolve extruded radius and intersection with leg and boss.

Is the bounding region allowed to intersect a surface? If instead of the existing inner hole, if the inner hole diameter were increased to just slightly less than the revolved surface with tool diameter clearanace, would the tool path generate and stop where the region intersected the leg? At worse I could probably create a joined surface to do same.

That way, total machine time <94 min and done with one tool change.

Best,
Kelly


191
CamBam help (General usage) / Re: Still Learning. Some Recurring Issues
« on: November 15, 2021, 16:49:22 pm »
I studied the file uploaded in post #36.

I had previously created a polyline to serve as a machine boundary. I noticed you created a similar (included the entire boss) polyline 25 and used it as boundary in the 3DSurface-Rough with an added .26” margin. So I assume the margin is to accommodate the .25” tool diameter. Is that correct?

For 3DSurface-Finish, the machining boundary appears to use 25 converted to a region 49. Why a polyline in one 3DMOP and a region in the other?......

…..I add a "plate" around the shape so the tool can't "falls" on the sides.

So to answer my own question, is it because using the smaller .125”D cutter could allow it to move outside the surface perimeter so it would have no reference for depth of cut and fall?.....and the region cures that issue. Correct?

…..the waterline rough mop is a sort of pocket operation, except that the contour of the pocket change at every DI to match the 3D shape. Do not use a ball mill to do WL rough, it is not taken in account to generate toolpaths. For WL finish, you can use a ball mill to avoid "stairs"…….
…………….the WL finish is a sort of profile mop, and as for WL rough the profile change at every DI to match the 3D shape…………
…………………with WL, the DI is the pendant of the step over for horizontal/vertical mops, it's the DI that give a smooth result, where in horiz/vertic it's is the steep over that give smooth results.

I noticed that Roughing is still selected under options in 3DSurface-Finish. Was this just for the purpose of using endmill versus ball? What I don’t understand, what are the differences in settings between the two MOPs that causes the 3DSurface-Finish to generate more profile like tool path and not attempt to machine the remaining pocket, while 3DSurface-Rough behaves more like a pocket?

Best,
Kelly

192
CamBam help (General usage) / Re: Still Learning. Some Recurring Issues
« on: November 15, 2021, 16:48:12 pm »
hi kelly
In reference to Freecad.

I have four computers, the third PC is installed Rhino 3D version 5.
Rhino is excellent and wonderful software, my version is perpetual.
You only pay once for the version.
The dollar is very self compared to Brazilian money 6 times more expensive.
costing a lot of money!

                    I fell in love with Freecad and complete!

   Armando
Thank you Armando. I'll check those out. I've looked at both before albiet a bit superficially.

Best,
Kelly

193
CamBam help (General usage) / Re: Still Learning. Some Recurring Issues
« on: November 15, 2021, 14:06:14 pm »
Be careful if you try my file, not sure the DI for the roughing can be used with this machine ; I assume that the part is in aluminum or something like this ?

The material is low density Polystyrene Foam (1.3lb/ft3 density). Almost impossible to break a bit or skip a step while cutting it. Can cut ridiculously fast for roughing and only need to slow up for finish or very high tool contact cuts. Cuts with 3" of flute contact on a .25"D cutter are possible with right feed/speed but typically one sided cut so chips can be cleared.

You've all the options shown on the video ? (laser, plasma, ...)

I have the plasma version and a small fourth axis. At some point I will probably buy a 40w laser to cut automotive gaskets. I wouldn't recommend it for anyone that was going to primarily use it for plasma cutting. In general, I'd say it's decent value for a light duty 3-axis machine with that work envelop but I would only cut soft materials with it, say up to plastics and hardwoods, thin aluminum sheet. With great care and patience, larger aluminum pieces but those aren't in my plans for it and would be the rare exception for me.....not  that I wouldn't like to have that capability.

I modified the work table to allow more height under gantry, replaced the limit switches (better accuracy), and all electrical cables (cure EMI problems). I made a better dust shoe.....the one supplied was worthless. I'm going to add 4" travel (total of 8") to Z-axis.

My primary use for the Router is making CNC lost foam patterns from Polystyrene Board for metal casting. The parts I make require a work envelope of 24"x 15" x 8". The work surface/waste board height can be moved closer to the Z0 to retain rigidty for harwoods and plastics, but the longer Z travel is no problem for cutting foam.

Here's an example of a lost foam pattern and the resulting casting. An aluminum automotive intake manifold. 22" x 12" x 5", .25" wall thickness typical. It's useful to be able to place metal where you want it. :)

Best,
Kelly

194
CamBam help (General usage) / Re: Still Learning. Some Recurring Issues
« on: November 15, 2021, 04:03:08 am »
Lol ... not sure too !! but the gantry seems to be very light, so maybe it can .. i see "The 35×35″ router weighs about 175 pounds" ... a pound = 1/2 Kg ? ... if it is the case it's the weight of my gantry only (500x700mm ~ 19" x 27") on the PFE500 ... ++David

Admittedly it's a hobby machine. There's a lot of things I have either upgraded or will ugrade but probably not a bad value for money for what it is and ok for what I'll do with it. As my skills and knowledge increase, I'm sure I'll outgrow it but for now and where I'm at on the learning curve, it's fine.

Best,
Kelly

195
CamBam help (General usage) / Re: Still Learning. Some Recurring Issues
« on: November 15, 2021, 03:45:10 am »
Camotics return the same machining time. (see picture) I don't remember if there is a way to specify the rapids in Camotics (I rarely use it)

Didn't know CAMotics has had run time estimates. I had to dig to find it under >View>docks

My machine's (published) rapids are supposedly 650 in/min. Not sure if I'd bet large sums of money on that.

https://millrightcnc.com/product/millright-cnc-mega-v-router-bundle/

Best,
Kelly

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