For my 'second' post, I guess I can show my "homebrew" CNC machine. A little unsure how to show the pics
here, but will give it a try. The machine frame is made of 1-in black-iron pipe. Saw this style from THIS website and decided to give it a try. My machine uses the 'Arduino-UNO' module. It uses the 'grbl' software ver 9. The step/direction commands from the Arduino are passed to three controller cards that I made using PIC processors. The PIC's pass the necessary driver step sequence to some "Dual-H-Bridge" drivers that in turn, drive the stepper(bipolar) motors.
I found quite a few interesting issues that had to be dealt with, and found it quite enjoyable to work on. Shown is an very old 'dremel tool' that I had, and used for a bit for testing and checking out milling/engraving . I have received my new 3-speed spindle , but don't have it mounted yet. Other more important things to do first, but hope to have it done in the next month or two. My X axis(left& right) is about 450 mm. The Y axis (front&rear) is about 150 mm and the Z axis is about 75-80 mm.
I use a program called 'inkscape' to do the drawing of the work-piece. There is a plug-in on the software that converts this image to the required 'g-code' file for the machine. I have found that I do have to check the file for 'grbl' compatibility and I'm still learning how this should work for best results.
Here are a pic of my new spindle mounted on the machine. I just finished this up today after
getting caught up from the last weeks 'ham radio' field day operation.
Hope this all shows up okay.
Last edited by kd8wdave; 07-07-2015 at 06:53 PM. Reason: add new spindle pics
This is so cool and looking forward to seeing your next version with the 3-speed spindle. I am also interested in the various homemade tools using the 'Arduino-UNO' module and the 'grbl' software after seeing John Saunders' YouTube channel NYCCNC on his adaptations. It is on my "to do" list.
Thank you for the posting!
Amazing to see you on here; just so's you know, on here I am proff11, as Paul Jones was already taken. Glad to see you enjoying yourself. Don't be afraid to put up pictures of The Last Spindle; I may print them out and frame them.("See what Grandpa used to do before we all learned to speak Mandarin.")
Last edited by proff11; 06-23-2015 at 10:57 AM. Reason: punctuation
Sometimes I use Inkscape to make DXF files to be converted into G-Code. I have the gcodetools plugin for my copy of Inkscape, but I can't say I'm a big fan of it. So I use other applications for post processing, depending on the kind of job it is. I like that spindle. I have one of those Chinese "500 Watt" air cooled spindles and I am not entirely sold on it. It works, but the top RPM is awfully slow. As best as I can tell it is no where near 500 Watts either. More like 100 Watts according to measurements I've taken. Congratulations on winning tool of the Week. I don't think my CNC machine even got honorable mention on this site. Maybe the next one that I build will?
Paul Jones (04-13-2018)
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