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Thread: 3D drawing
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1st April 2012, 01:20 AM #1Senior Member
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3D drawing
Hi All
i have recently purchased a desktop CNC, after alot of reading of the posts on here and watching several videos i have successfully got the motors working today and am able to move the spindle around the table. next i have to set up the inverter to run the spindle. i have been trying to figure out how to do a 3D drawing so that i cut out some molds for casting....with no luck. i have used AutoCad a bit for basic drawings but never drawn anything in Z axis. after a few hours trying i have drawn a 3D block but when i save it and convert to g-code it is back to 2D. is this the correct program to use ir is there a better option? any advice would be appreciated
thanks
marty
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1st April 2012 01:20 AM # ADSGoogle Adsense Advertisement
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1st April 2012, 02:28 PM #2
Auto CAD should be fine for 3D ( what year? )if it was a free version it might have some parts "turned off" like saving in 3D ??? , Auto cad should work
im using Turbo CAD pro 16 , and are now getting the hang of using the software ,after 6months of using it , drawing some quite detailed 3d moulds
this weekends effort was the side wall for an electric motor to be cast in carbon fibre ( in rim electric cart wheel )
this drawing i started on friday night , a bout 8 hours , there are over 800 sphere's all positionedhow come a 10mm peg dont fit in a 10mm hole
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1st April 2012, 02:32 PM #3
what g-code editor are you using? , my Turbo Cad ,CAM plugin is only 2.5D , can only run shape on a fixed zaxis height , it cant run 3d files
how come a 10mm peg dont fit in a 10mm hole
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1st April 2012, 02:41 PM #4Senior Member
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1st April 2012, 04:08 PM #5
haven ever seen or used BamCam so cant really help there , im using Cut3D from Victric , use there Cut2D software as well , they work well, but i wouldn't recommend them ,
the 2 together cost as much as my CAD software , and way less programming time has been spent on them , they work well but i personally believe there
over priced
a lot of time waisted by only allowing roughing tool overlap paths to be less than 50% of diameter of the bit ,
but you have to set the feed rate for the 1st path cut at full width ,
im looking around for a good CAM , something with better ( more control) over finishing tool path ,rather than just 45deg straight runs ( more contour following with climbcut options )how come a 10mm peg dont fit in a 10mm hole
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1st April 2012, 04:29 PM #6
i just knocked up a 3d test file in "exchange format " just a rectangle , sphere,cone, do-nut, as one object , run this through your CAM and see if it works
probably need to convert into a" stereo lithograph " file first , but cant attach those , i might try and zip ithow come a 10mm peg dont fit in a 10mm hole
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1st April 2012, 05:23 PM #7Senior Member
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haha show off , ill have a go and see if it works. this is all im trying to do for a first run. i want to do a series of different sizes for casting pen blanks wrapped in various items.
thanks
marty
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1st April 2012, 05:51 PM #8
so a pen blank is 125mm long 20wide , and 2 mandal fittings on the ends ? 10mm dia , 10mm long
lol 5min rushed it abit the to "poles are 1.2mm out from bad diagonals on the endshow come a 10mm peg dont fit in a 10mm hole
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1st April 2012, 06:15 PM #9
a mould of them ( corrected the out of line poles ) DXF file as well
you should be able to scale the length , these are 125mm long , 20x20 , with 10mm poles , squared up so you can get them out of the mould , the sides are at 90 deg so it you make a hard mould it will be hard to get them out, so i added drawing5.dxf that is a "plug" for a rubber mould ,keep the plug and store the rubber mould on it to stop warping , a lot of people have the bottom side rounded off to save on resin , mine are just square
with the square bit (mandral) i just fill in the extra with bluetac before adding the resin ( bluetac around the mandrel as well )my mandrills are just 8mm dowel sized to fit the tube , bluetac or wax seal to keep the resin out of the tubehow come a 10mm peg dont fit in a 10mm hole
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1st April 2012, 07:15 PM #10Senior Member
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only 5 min ay lol, took me about 3 hours last night to draw up what i have for some reason the last few filse you have attached wont open up, it says they are incomplete? thanks for your help its really appreciated, ill keep playing tonight and see what i manage to come up with
marty
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1st April 2012, 07:55 PM #11
it takes a while to get used to CAD , use the X<Y<Z input boxes on the bottom of the page , dont move objects by mouse , they will jump around in the unseen axis , just highlight an object , then using the input boxes on the bottom of the page type in what direction you want to move it , you can also lock one axis ( so drag and drop works )
turbo cad has more object and sweep menus to choose from , 1 click for position type in the sizes hit enter and the object is on the page ( box ,sphere ,cone ect )how come a 10mm peg dont fit in a 10mm hole
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1st April 2012, 09:03 PM #12GOLD MEMBER
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CamBam lets you draw an item, specify the machining operations to be carried out on the parts of the drawing, then generates the g-code to make the part.
If you need to edit g-code, you can use any simple text editor, or a g-code specific editor, but my understanding is that you generate g-code, then transfer it to your CNC machine, which runs the g-code.
In my CNC journey so far, I've only used the trial version of CamBam, and run the g-code through EMC2.
Cheers,
Andrew
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2nd April 2012, 09:44 AM #13Member
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3d
We use Rino Cad to Rino Cam to Mach3 and do not have problems.
Rhino Cad has a large learning curve but it does fantastic stuff.
I have done computer programming but this one is beyond my under st anding.
It is well worth the money.
Regards
Joe<style type="text/css"> <!-- @page { margin: 0.79in } P { margin-bottom: 0.08in } --> </style> Politicians are like diapers.
They need to be changed for the same reasons.
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5th April 2012, 10:02 AM #14
I run rhino cad and rhino cam and the use EMC2 never had a problem.
Rhino I am told is a meant to be easer to learn then auto cad. I have played with both and only ended up with rhino as I just spent more time on it and this made it easer as you come more comfortable with it. It could have been autcad that I ended up using just as easily.
Sounds like your not going to design the next space shuttle so stick to it and with time it starts to make sense.
Russellvapourforge.com
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5th April 2012, 10:08 AM #15
SawDustSniffer
I would like to see a thread on the motor part your making in carbon fibre, rim.
I done a lot of RTM moulding and other fibre moulding in my time.
It would be of great interest to me any ways....
Russellvapourforge.com
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