XY Table
Description
it might not be all that useful to anyone else but still I might as well put it up here if anyone is interested.
I added the sketchup model for any parts that I missed on the stl files so just use that to extract parts.
I’m not going in to a full assembly description but for more details you can have a look at this post over at LMR. It also has a video.
letsmakerobots.com/node/31381
UPDATE:
Just now I got some information on the 28BYJ-48 steppers that I used and can verify that this is a problem. So for anyone trying to build a sub-mm accuracy XY table, please try finding other stepper motors.
This is the information I’m talking about;
arduino.cc/forum/index.php/topic,71964.0.html
Instructions
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Hi Geir,
I see on the LMR page youv'e got the NEMA14 version now, looks awesome. Can you post the updated files for it? Cheers,
Gav
Could you provide a DXF for the 30cm x 30 cm acrylic base? This would help us make up this very nice XY plotter, now to hang some mirrors on them with a laser would make a very cheap (and small) laser cutter. But not all things to be laser cut are large. What area does the X and Y axis cover?
There is no DXF file for the base. It
âs just a regular 6mm acrylic plate that was cut to about 30x30cm. As I donât have the XY-table here anymore I canât give you the exact max working area but it was designed to be used with a 96 chamber microwell. The working area could probably be extended by using longer 6mm rods.
Good luck w
ith your plotter, but I do recommend going for some other stepper motors as these suck.
I like your belt tensioning system! 8-)
Do you notice any bounce on direction changes or are the springs pretty stiff?
I have a few of those 28BYJ-48 step motors. And I found a different problem, and that's that they have about 5deg of play. Making them pretty much useless for any precision control.
I was looking for a simply X/Y table design, so thanks! I'm planning to use NEMA14 motors:
http://www.watterott.com/en/St...
Which are not that much larger and should fit on your design quite easily.
Could you please tell me what the dispensing system is ? I can see what is perhaps a tiny solenoid pump / valve ? just curious. Great job, btw!!!
Thanks for sharing. I have been thinking about the 3D printer application to the scientific community for a while and really like the notion of FREE SCIENCE instead of having to pay exorbitant prices for specialist scientific equipment.
This is a step in that direction.
This could be VERY useful to make a teeny tiny plotter or laser cutter. Thank you for posting it! :)
License
More from Geir
Can you post the full skp project file?
cool project btw :)
No problem. I added the original file and a new version using a better stepper motor http://www.phidgets.com/produc...