Abacus Robot: My diy CNC PCB Milling/Drilling Project - Page 2 - diyAudio
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Old 13th September 2011, 02:59 AM   #11
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Quote:
Originally Posted by qguy View Post
AWESOME !!!
Quote:
Originally Posted by thaumaturge View Post
Very nice work. Watch the duty cycle on that dremel. I've toasted one before from over temp. Maybe add an overtemp system shutdown sensor touching the dremel case? LM 61's are cheap.
Just a thought.
Doc
That Dremel is a darling, only gets warm during my use. But I'll closely monitor it as you've said, I have a handheld IR temp sensor which I use to take temps of the motors, drivers, psu, etc.

Thanks!
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Old 13th September 2011, 02:59 AM   #12
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Originally Posted by fireworks View Post
Very nice !

Thanks!
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Old 13th September 2011, 03:02 AM   #13
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Originally Posted by digits View Post
Where did you get those nice rails, I heard McMaster doesn't realy do international shipping anymore.

Here, those can be found in junk shops, sidewalk shops selling surplus motors and stuff. I was lucky to get the size and same model rails that I needed, I guess.
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Old 13th September 2011, 03:06 AM   #14
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Originally Posted by bear View Post
Sweet!

Two things...

Lucite sheet/ acrylic sheet is not dead flat and varies in thickness... fyi.
May not be significant.

It is a good idea to install a collar thingie near the cutter end of the dremel that is hooked to ur vacuum cleaner to get the dust out of the air and away from the work... there are a few different ways to implement it...

Nice job... whose controller did you use??

_-_-bear


Thanks for the thought, I did make thickness measurements and was very happy with an error of only 0.0015" on the caliper. I reckon that anything over 0.01 would yield an uneven pcb especially if the work piece is larger than 5" X 5".

The vacuum is an old car vacuum that I power from a bench top 12V supply.

The controllers are pretty generic stepper drivers only.
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Old 13th September 2011, 03:10 AM   #15
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Quote:
Originally Posted by Zero Cool View Post
Nice job, I have a converted Shibaura Roibot industrial X-Y arm converted that I am alsmot finished with.

Here are some videos of my machine in action running some test programs

overkillaudioinc's Channel - YouTube
AWESOME!

I see you are using Mach3 for Windows, how is it?
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Old 13th September 2011, 03:16 AM   #16
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You sure those are roller bearings and not ball bearings?
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Old 13th September 2011, 03:58 AM   #17
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Originally Posted by 454Casull View Post
You sure those are roller bearings and not ball bearings?
My bad, those are ball bearings. Thanks for pointing it out.
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Old 19th September 2011, 01:06 AM   #18
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What are you using for limit stops and how is that integrated to the motors and/or software?

Btw, I just picked up a nice homebrew type of table similar to yours from the local surplus place, needs a little TLC and the steppers acquired and installed, but otherwise it is all there...

_-_-bear
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http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
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Old 21st September 2011, 12:45 PM   #19
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Limit and home stops are connected via the parallel port inputs. These are then setup with EMC so the software knows where Home and Limits are.
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Old 24th September 2011, 03:01 AM   #20
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Very nice!

This looks remarkably similar to an engraving machine I was offered for $1000 a year ago from an industrial surplus place. The main difference was the engraver used a motor mounted in a fixed position with a collet held like a Dremel and connected to the motor by a flexible "speedometer cable" drive.
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