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4th Mar 2012, 04:53 PM #1.
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CNC and the possible abandonment of Luddism.
Yesterday I called in at the home of Rod M and viewed and witnessed the workings of some of his incredible CNC creations. Ball screws, linear ball slides, stepper motors and an unbelievably modest creator. ( The linear slides may be a way of rescuing my T and C grinder from a watery grave, something Joe suggested way back ).
Rod has made a number of these CNC machines using older machines to make newer versions. He tried to assure me that he has only a rudimentary understanding of electronics. He was not very convincing in his assurances! He made his first machine only 7 years ago. Everything is fabricated, not welded for fear of distortion. Adjustment is built into the components to faciltate tweeking.
Just watching for example, the stepper motor abruptly change rotation direction and seeing how the spindle can quickly move from one co-ordinate to another with accuracy has given me an appreciation for this technology that I didn't have, and would not have had if I continued to embrace the protestations of Ned Ludd.
Sure, I've watched numerous YouTube CNC machining clips but they show machines well out of the realm of most back yarders. Rod's machines are approachable and understandable.
Well done Rod.
BT
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4th Mar 2012, 05:49 PM #2
Congratulations Rod, you have converted Captain Ned Ludd himself, no small feat.
Beautiful work, and very cleverly thought out attention to detail, it reminds me of some of the work that Harty and Jayson are doing down in Horsham.. all of which makes me want to get the HM52 CNC conversion finished..
CNC is becoming much more affordable, and opens up scope for a lot of projects that would in years past be out of reach for the home hobbyist..
Thanks for the pictures BT, and I look forward to the CNC conversion of that Hercus T&C grinder...
Regards
Ray
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4th Mar 2012, 08:07 PM #3Senior Member
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- Queensland
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Bob All CNC machines are for the most part they are the same. Some of the most talented machinists I have worked with approach every machine the same. The hardest part is getting used to the key pad and dials on the controller thats it! All programing is very much the same from lathes to mills, from Fanuc Heidenhain and Mac 3 its little differences and once you get your head around the basics it doesn't matter the size or type of machine. Any one can use a CNC but having one at home wow that just opens up so meany doors
ill tell you a secret the best CNC machinist are also good manual machinistshappy turning
Patrick
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4th Mar 2012, 09:06 PM #4Golden Member
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- May 2003
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- Perth WA
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Hi Bob,
Enjoyed our chin wag from Luddite to computer controlled machining. A home brew machine is within the capabilities of any backyard sheddie. Parts out of China have made these a lot more affordable and now complete machines can be imported for about $2k - not all that great but a starting point. Looking forward to seeing what a Luddite hides in their shed.
Hi Ray,
About eight years ago mach2 opened the door for affordable machine control software. I paid around $130 for the software compared to many thousands of dollars plus annual maintenance fees for propietry software.
With that came cheap electronics built in back sheds and the interest has grown to full time businesses supporting the lower end of the market.
I have been watching and very interested in your HM52 conversion with the thought of doing the same myself. I have an X3 converted to CNC but you can't beat mass and a lot more travel in a machine.
new_guy90,
Totally agree you cannot machine anything without knowing at least the basics of machining and materials. I have a manual mill and lathe which I taught myself to use before entering the CNC side of things.
Having a CNC totally changes the way you design and think about jobs. Shapes become part of the design as you are not worried about changing setups, rotary tables, boring heads and usually less jigs and fixtures are required. It all just happens usually with just one cutter.
I will always have manual machines but there is a place for CNC and on the hobbiest side a mug can produce professional results they couldn't otherwise.Cheers,
Rod
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5th Mar 2012, 11:55 AM #5.
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- Perth WA
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Maus shots.
I had said to Rod that his machines reminded me of some nicely fabricated stuff I had seen in Germany.
BT
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5th Mar 2012, 02:00 PM #6
Thats some impressive machine thanks Bob for showing it in very good detail.
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5th Mar 2012, 07:19 PM #7Senior Member
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Rod I was completely against CNC in the home shop. Most people think CNC's are the be all and end all and they are the quickest most easiest machines that can spit out aircraft parts with ease...... These people have no idea! I ran broken CNC mill in my last job so when I said "I run CNC mills" people said "Oh so you have it easy, all the programs are set and all your tools are in the machine" Stunned look "um no... our tool changers are broken on both the machines I run, so I have to change each BT50 tool by hand, some programs have 14 tools per part..... I write my own programs and any old ones I use I edit/change because I dont trust them...."
FYI guys BT 50 tool holder are a good size and bloody heavy!
The guys I used to work with knew less M code and G code than I KNOW some hobbyist teach themselves and they were tradesman
Another point CNC's need lots more maintenance! if you dont keep up with your maintenance your wasting your money in the long run
Rant over lol so where do I stand now? If your smart and learn to use CNC properly and not treat it as a magic box where i type some code and aircraft parts come out then yes bring it on because you obviously have what it takes to get the most out of it ......I also want a Mazak quick turn and VMChappy turning
Patrick
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5th Mar 2012, 07:37 PM #8Golden Member
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7th Mar 2012, 07:19 AM #9Senior Member
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Originally Posted by new_guy90
Laugh when the yanks whinge about spending $1500 with the proprietary control service provider of their choice. Get the friendly Fanuc man here and replace a board and it's 4.5k out the sky rocket, but maybe that's something for the Australian retail thread.
Oh, another gripe, Fanuc manuals are written in something approaching English, good luck on the comprehension though.
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7th Mar 2012, 08:42 AM #10
Try busting a cockpit display like I did last year. $78,000.00. Never on sale
It's all part of the service here at The House of Pain™
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7th Mar 2012, 05:13 PM #11Most Valued Member
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7th Mar 2012, 05:16 PM #12Most Valued Member
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Rod what do you think the X3 cost you to convert? It's something that's been on my radar for a while. I'm learning ACAD (a frustrating program, especially the Mac version as it's buggy), so after a couple more years I should be ready for the CAM side of things. I think a machine the size of an X3 would be ideal (if I can figure out where I'll put it!!!!).
Pete
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8th Mar 2012, 06:40 AM #13Senior Member
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Originally Posted by Greg Q
I think for these things, they expect a temperature controlled clean room environment to let the 2 cent chipsets they pick up in some Taiwanese bazaar last a year.
In other news, Bohler is closing their Sydney outlet. If that's an indication of usage, we might be going back to hammer and file to make things....save your pennies for the aussie firesale.
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8th Mar 2012, 11:22 AM #14Golden Member
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Hi Pete,
The X3 was done a number of years ago so I can't remember the cost of converting it. I would estimate $2.5k would see it done today.
I got a kit from here
There is an Aussie maker here but prices are higher and a bit hit and miss on communication and long lead times for supply.
I mill mostly ally but have done a few jobs in mild steel flat bar and brass and quite happy with the setup..Cheers,
Rod
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8th Mar 2012, 11:38 AM #15Golden Member
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- Perth WA
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more ....
I used to use Turbocad and a CAM program to convert to Gcode.
Over the years they have developed CAD/CAM packages which are easy to use and low cost..
Link here which will do simple 2D toolpaths but you wil quickly want more so look at Vcarvepro as an option.
I use Aspire now as I do 3D carvings on my gantry router but for a mill Vcarvepro is as far as you need to go.
To be objective I have to say I used to be a Beta tester for these products so maybe I am influenced by that so look around as there are other packages out there.Cheers,
Rod