Loading

Printable Modular Machine Components

by pandelume, published

Printable Modular Machine Components by pandelume Apr 24, 2010

Featured Thing!

Description

This is an experimental set of printable machine parts, the idea being that you can configure these into whatever 3-or-fewer-axis machine you want. The basic parts are:

1) Linear rail and ball carriage.
2) Rack and pinion
3) Structural blocks with 2 (angle), 3, 4, and 5 mating faces.

Hole patterns for all parts are NEMA 17 - 31mm square, and holes are sized for M4 fasteners.

With the right tool holders it should be possible to make a small milling machine, drilling machine, maybe a pick-and-place machine, who knows? I invite people to please post suggestions or modifications.

Notes:

1) I haven't printed any of these yet, but I have skeinforged them, so I think they'll print ok.
2) I haven't arranged multiple parts into one file so they can be printed together, but it would be smart to do this. I'll post assembled files when I get a chance.
3) I don't know how accurate the resulting machine will be, so please keep in mind that this is still something of a work in progress. I hope to add and anti-backlash split gear as a start, but I'd love to hear other suggestions.

Recent Comments

view all

this looks very promesing!

i'm trying to make a CNC machine with a big span (
&
lt;100 cm), but i think i have to reinforce the cubicles

i'm thinking about a diagonal cross inside or a sort of pyramide on top(bottom) , and or combine parts before printing

can you post the SCAD files?

and do you know if coolant reacts with ABS/PLA ?

regards
Henk

Further back in the same blog's archives he mentions light weight frames, which have very little deflection when loaded down:
http://technocraticanarchist.b...
http://technocraticanarchist.b...

I wonder if it would just be a matter of adding a thin plywood skin for support? Or sheet metal?

Liked By

view all

License

GNU - GPL
Printable Modular Machine Components by pandelume is licensed under the GNU - GPL license.

Give a Shout Out

If you print this Thing and display it in public proudly give attribution by printing and displaying this tag. Print Thing Tag

Instructions

1) Determine the machine configuration you want
2) Print the various parts required
3) Drill and tap the pinion setscrew location and the end cap fastening holes in the rail car body - I was thinking M3 fasteners.
4) Assemble the rail cars with 5mm ball bearings - be sure to lubricate them
5) Assemble the remaining parts, making sure to key the rack and rails together.

Comments

You must be logged in to post a comment.

Anonymous on Jan 3, 2012 said:

this looks very promesing!

i'm trying to make a CNC machine with a big span (
&
lt;100 cm), but i think i have to reinforce the cubicles

i'm thinking about a diagonal cross inside or a sort of pyramide on top(bottom) , and or combine parts before printing

can you post the SCAD files?

and do you know if coolant reacts with ABS/PLA ?

regards
Henk

LeoM on Apr 25, 2010 said:

Remember me the OpenStructure project : http://www.openstructures.net ;)
Nice Work

pandelume on Apr 26, 2010 said:

I hadn't heard of it before, but openstructures seems like a neat project. I had initially sketched this up with much larger parts, but reduced it to use the NEMA 17 hole mounting pattern to reduce size and print time, and to remove a bunch of specialized motor mounting blocks. Maybe I can do a version that conforms to the openstructures guidelines - I'll take a look.

RobotHacker on Apr 26, 2010 said:

I took that site as inspiration for my version http://www.thingiverse.com/thi... but I like this version more.

MarcusWolschon on Apr 25, 2010 said:

Cool.
I am thinking of designing a modular drill-stand using such parts.

Wade on Apr 25, 2010 said:

Wow, nice work! Can't wait to see one printed. How hard would it be to change it to use a much smaller pinion gear? With the usual steppers and drivers, we'd need a much smaller pinion to get close to the usual RepRap resolution and torque. A microstepping driver would get you close enough on the resolution side though.

pandelume on Apr 26, 2010 said:

Without changing anything else, the simplest way to swap a smaller pinion would be to just have a taller rack. On the other hand, I think too tall a rack would be somewhat self-defeating considering how much more material would be needed. I'll take a look at it and see how small a pinion would work.

Alternatively, I could generate a motor block with off-center hole patterns to move the motor and rack closer together, or set up a gear train of some kind - although we would really need backlash control in that case.

kristianpaul on Apr 25, 2010 said:

nice desing, but for reprap will be nice change license to be comatible

pandelume on Apr 25, 2010 said:

I have updated the license to GNU GPL, which I think is the reprap license.

MaskedRetriever on Apr 25, 2010 said:

This eliminates rods from the reprap concept. This is a large push towards reducing the cost of CNC to ONLY steppers and driver circuitry. A big step indeed!

RobotHacker on Apr 25, 2010 said:

Sweet! I think the helical/herringbone gears, racks and pinions I've seen around might take care of backlash.

Hopefully it works out, then an almost entirely printed printer could be made.

I like the printable nature of it, compared to my non-printable idea.

RobotHacker on Apr 27, 2010 said:

Ah, here is where I saw info on herringbone rack and pinion:
http://technocraticanarchist.b...

pandelume on Apr 26, 2010 said:

Thanks for the suggestions - I'll take a look at helical gears. To tell you the truth I have some doubts about exactly how scalable this will be, so I like your lasercut idea for machines that are on the larger side.

Top