Tom,
I had to upload that file while I was running out the door for work . Tried cutting it last night ,got about half way done and then the bit pluged up on a sidewall . any suggestions ?
Hi Brian,
make sure you are not climb cutting and be sure to use plently of coolant to drive the chips away from the cutter. If you dont have a coolant pump use your sharpest cutter and your air compressor to keep those chips moving away from your cutter as soon as they are cut. The air will also keep the cutter cool.
The most I go is about 10 ipm. Remember its the chip load thats important I would not want to go more than .002 per tooth per revolution of the cutter.
Tom
Its not the size of your motor, Its how you use it ( humm where have I heard that before.....lol ). Also, feed rates vary from material to material. Mach3 has a feed rate calculator that comes in handy sometimes.
Tom
One more question , what method of milling do you think I should use . Planer , radial or spirial ? I was using planer ( back and forth) on the bracket last night.
Brian the method will depend largely on the type of cut. One thing to remember is that end mills cannot plunge so I would spirial in and then radial cut to make a pocket for instance.
Thank's Tom, ·Moving right alone , things work·alot better when you don't try to push it to 60 ipm . received my ebay motors and cut all my·frame·parts,waiting for mill to be free to engrave name and ping holes ( I·maybe could drill them).
Some end mills can plunge, others can't. I always use the type that can. If I am machining something where chips can build up around the cutting tool I use a small shop vac to keep the bit clear. I will also apply a couple drops of cutting oil to the bit periodically while it is cutting to keep chips from sticking. Lastly, a 'chip' brush can work well to clear chips away from the bit while it's running.
Looks like your spindle speed is set pretty high. If you have any problems with tool heating up you may be able to lower spindle speed without any problem. I cant really tell from the pics but the vertical ways on your machine look alittle dry. I keep the ways and lead screws on my taig oiled with marvel mystery oil, its not too heavy and not to thin. The parts are lookin good I cant wait to see them bolted together.
Tom
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Robot vision is the the future, and Vision will take us there.
Heres my second try at my axel bracket , this one might look like it's ok but everything got offset 1/4 to one side. All the cutting went really good except for the last clean up pass when sombody(me) forgot to enter the right tool width . Any how I learned a ton on this bracket so I can ·call it a success . Heres a photo of the cnc plasma cutter I use to cut my frame (it's easy to run compared to the mill).
Ken,
I can get a really nice edge on steel .I just started cutting aluminum and the edge looks like you ran end mill over it to fast. I’m getting better every cut I do ( hard to practice with the price of metal).
Yeah, you aren't kidding about the price of metal. I think aluminum is around $3.30/lb in California these days. If you dare walk into a scrap aluminum place and collect up a handful of aluminum you're at $100 before you have a chance to think about what's in your hands.
I attached the layout in DXF format. This includes the two transducers and screw locations. You might need a mirror image depending on the side of your robot on which this mounts. Let me know if you need anything else.
Do your best to machine these holes instead of drilling them. If you drill then use a 0.64" bit - this is something I don't have in my set of drills but maybe you do because of the real stuff you do during the day.
When you screw the Ping))) sensors into the robot frame, don't overtighten the PCBs. I've noticed that this will cause shorts in the PCB.
Another point. I don't think I made any of the parts on my current hybrid robot only once. Some parts were made 2x or 3x. In the end it was always the simple solution that I liked the best.
I didn't put dimensions on the file since they're part of the DXF.
Good luck!
Ken Gracey
Parallax, Inc.
Post Edited (Ken Gracey (Parallax)) : 4/6/2007 5:17:05 AM GMT
Comments
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Thank's Brian
www.truckwiz.com
·"Imagination is more important than knowledge..." ·· Albert Einstein
http://www.diycalculator.com/subroutines.shtml· My favorite website ( Bet you can't guess why)
I had to upload that file while I was running out the door for work . Tried cutting it last night ,got about half way done and then the bit pluged up on a sidewall . any suggestions ?
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Thank's Brian
www.truckwiz.com
·"Imagination is more important than knowledge..." ·· Albert Einstein
http://www.diycalculator.com/subroutines.shtml· My favorite website ( Bet you can't guess why)
make sure you are not climb cutting and be sure to use plently of coolant to drive the chips away from the cutter. If you dont have a coolant pump use your sharpest cutter and your air compressor to keep those chips moving away from your cutter as soon as they are cut. The air will also keep the cutter cool.
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Whit+
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Thank's Brian
www.truckwiz.com
·"Imagination is more important than knowledge..." ·· Albert Einstein
http://www.diycalculator.com/subroutines.shtml· My favorite website ( Bet you can't guess why)
Tom
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Thank's Brian
www.truckwiz.com
·"Imagination is more important than knowledge..." ·· Albert Einstein
http://www.diycalculator.com/subroutines.shtml· My favorite website ( Bet you can't guess why)
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Thank's Brian
www.truckwiz.com
·"Imagination is more important than knowledge..." ·· Albert Einstein
http://www.diycalculator.com/subroutines.shtml· My favorite website ( Bet you can't guess why)
Tom
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Thank's Brian
www.truckwiz.com
·"Imagination is more important than knowledge..." ·· Albert Einstein
http://www.diycalculator.com/subroutines.shtml· My favorite website ( Bet you can't guess why)
Tom
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Thank's Brian
www.truckwiz.com
·"Imagination is more important than knowledge..." ·· Albert Einstein
http://www.diycalculator.com/subroutines.shtml· My favorite website ( Bet you can't guess why)
·Moving right alone , things work·alot better when you don't try to push it to 60 ipm . received my ebay motors and cut all my·frame·parts,waiting for mill to be free to engrave name and ping holes ( I·maybe could drill them).
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Thank's Brian
www.truckwiz.com
·"Imagination is more important than knowledge..." ·· Albert Einstein
http://www.diycalculator.com/subroutines.shtml· My favorite website ( Bet you can't guess why)
Rich H
Tom
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Robot vision is the the future, and Vision will take us there.
Ps. Thanks Rich·and Tom for the suggestions.
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Thank's Brian
www.truckwiz.com
·"Imagination is more important than knowledge..." ·· Albert Einstein
http://www.diycalculator.com/subroutines.shtml· My favorite website ( Bet you can't guess why)
Post Edited (Brian Beckius) : 4/5/2007 4:10:45 AM GMT
Tom
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Robot vision is the the future, and Vision will take us there.
Plasma cutter is at my work , if you ever need anything cut just send me a dxf file. I'll be happy to cut it and ship it to you.
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Thank's Brian
www.truckwiz.com
·"Imagination is more important than knowledge..." ·· Albert Einstein
http://www.diycalculator.com/subroutines.shtml· My favorite website ( Bet you can't guess why)
What kind of finish edge does the plasma cutter provide? Pretty clean, or do you need to file and sand to clean things up?
Ken Gracey
I can get a really nice edge on steel .I just started cutting aluminum and the edge looks like you ran end mill over it to fast. I’m getting better every cut I do ( hard to practice with the price of metal).
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Thank's Brian
www.truckwiz.com
·"Imagination is more important than knowledge..." ·· Albert Einstein
http://www.diycalculator.com/subroutines.shtml· My favorite website ( Bet you can't guess why)
Post Edited (Brian Beckius) : 4/5/2007 4:14:51 PM GMT
Ken
Do you have the pattern·for mounting “ping” threw the frame, like on your robot? ( hole sizes and distance apart)
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Thank's Brian
www.truckwiz.com
·"Imagination is more important than knowledge..." ·· Albert Einstein
http://www.diycalculator.com/subroutines.shtml· My favorite website ( Bet you can't guess why)
Post Edited (Brian Beckius) : 4/5/2007 6:36:10 PM GMT
Bracket #1 took Saturday and Sunday, Bracket #2 had 12 hours on the mill, bracket #3 had 1.5 hours on the mill.
ps. forgot to reset date on my camera.
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Thank's Brian
www.truckwiz.com
·"Imagination is more important than knowledge..." ·· Albert Einstein
http://www.diycalculator.com/subroutines.shtml· My favorite website ( Bet you can't guess why)
Post Edited (Brian Beckius) : 4/6/2007 3:28:29 AM GMT
I attached the layout in DXF format. This includes the two transducers and screw locations. You might need a mirror image depending on the side of your robot on which this mounts. Let me know if you need anything else.
Do your best to machine these holes instead of drilling them. If you drill then use a 0.64" bit - this is something I don't have in my set of drills but maybe you do because of the real stuff you do during the day.
When you screw the Ping))) sensors into the robot frame, don't overtighten the PCBs. I've noticed that this will cause shorts in the PCB.
Another point. I don't think I made any of the parts on my current hybrid robot only once. Some parts were made 2x or 3x. In the end it was always the simple solution that I liked the best.
I didn't put dimensions on the file since they're part of the DXF.
Good luck!
Ken Gracey
Parallax, Inc.
Post Edited (Ken Gracey (Parallax)) : 4/6/2007 5:17:05 AM GMT
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Thank's Brian
www.truckwiz.com
·"Imagination is more important than knowledge..." ·· Albert Einstein
http://www.diycalculator.com/subroutines.shtml· My favorite website ( Bet you can't guess why)
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Thank's Brian
www.truckwiz.com
·"Imagination is more important than knowledge..." ·· Albert Einstein
http://www.diycalculator.com/subroutines.shtml· My favorite website ( Bet you can't guess why)
You're making good progress! Nice work. I can see that you are either staying up late or missing work to build this robot.
The CNC work looks nice. I can see the Ping cutouts. I drilled and tapped for 4-40 screws.
Propeller DXF, eh? I'll see what I can do. . .
Ken Gracey