XY Table

by Geir, published

XY Table by Geir Mar 6, 2012

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XY Table by Geir is licensed under the Creative Commons - Attribution license.

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I made this for my brother so he could have sensors or equipment navigate over a microwell plate http://en.wikipedia.org/wiki/Microtiter_plate
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.

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;

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A proffesional look, good job!

Hello, I was just curious- are there bearings hidden in the pullys? I just printed them and they seem too large for just an M3 bolt. Thanks for posting this project!

I must admit that it has been a while since I built this, but I do believe that there was a small bearing in the idler wheel.

Maybe his could make a laser engraver with a blue ray laser. The drivers for those little steppers are at deal extreme for $5 with the stepper.

Could you post the parts that use the better stepper?

Very nice project! Im hoping to remix this into a xy plotter :) im a bit confused, have you uploaded the STL's for using Nema-14?

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/products.php?category=23&product_id=3301_0http://www.phidgets.com/produc...

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,

I second this

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
’s just a regular 6mm acrylic plate that was cut to about 30x30cm. As I don’t have the XY-table here anymore I can’t 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?

The spring system works great and the only problem is the stepper motors that are crap.

’m pretty pleased with the spring tension system myself :)

What is wrong with the steppers? they are not precise? I ordered some ones time ago because they are so cheap!

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:
Which are not that much larger and should fit on your design quite easily.

Thank you for the link on the stepper motor.

And yes the 28BYJ-48 motors are crap. If I had known the issues with the motors in forehand, I would have used something else, so thank you again for the link.

The 28BYJ-48 are indeed crap. I got them for a small X/Y/Z table, but quickly figured out they where no good for that.

I've used 1 for a small "rotate" table. It's a simple round platform where you can put your 3D model on, and then have a camera take photos while the motor rotates at a fixed rate.

Guess I'll use the other 2 in a small robot with wheels.

Nice. !!
lt;- two thumbs up

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.

Awesome stuff! This should help me get my Zen Table built! =D

This could be VERY useful to make a teeny tiny plotter or laser cutter. Thank you for posting it! :)