Transform dobot in resin 3d printer for free!


I have just noticed this project on KS:

I think Dobot could do that (even in better with subpixel resolution by moving on X-Y) simply by building an appropriate cardboard enclosure and put inside of it a transparent baque on a smartphone/tablet. I want to try to do that! @Dobot if you finance me a bottle of daylight resin for my tests, I am ok to developp the project and release it as open-source! :smiley: (hardware design + instructions + multi-plateforme app).

PS: [joke] this is not a reason not to send me my 3D pen, I am still waiting it! ::yum:

PPS: I think it could be interesting to create a “developments” section in the forum. I have personally a lot of other projects I plan to test (ex: pick & place + solder SMD for circuit boards … :wink:), and I am pretty sure others have also a lot of imagination!


Where did you get a Dobot that has subpixel resolution?
I would like to see your Dobot doing something at subpixel resolution. I would like to see a Dobot do something reliably at 1 cm resolution.

Good Luck


Yes you are right, I have been a little bit too ambitious about this point, even with 0.2mm precision it is still less accurate than screen pixels of a phone. However, horizontal translations could be used to increase the working space, a phone screen can be too small for some prints.


All resin printers use a projected image of each layer to be made.
High UV DLP projector or a UV beam source steered by mirrors.
No bot could translate as fast as that.
It appears you may be farting into the wind!!!



I don’t understand why I would need high velocity. In basic mod, the image layers are displayed by the smartphone and Dobot only slowly bring up the 3d object . For the improvement I suggested in my previous message Dobot also slowy translate horizontally the object while the smartphone translate too his model to expose the whole layer. So every points won’t be cured at the same time, but I would say it should be ok (but need to be tested).


IMHO for free you would only get a headache and a lot of quite expensive resin in your trash… at the very least. I see you had hard time making dobot move at all and here you’re talking about precision that even dobot’s mechanics can’t provide - all the joints are pretty loose.

Have a read about the defect rate for the models printed with printers that cost $2-3k, how the model doesn’t stick to the platform or getting stretched in Z axis and many many other things that go wrong. That is, unfortunately, not the kind of machinery that can reliably and precisely print. Even industrial machines run many many times before they everything is set up right to produce a batch with minimal defect rate.

I hope very much OLO is not just another nice fantasy, but that’s definitely not a job for dobot.


Thank you very much for bringing up these potential difficulties.
My first observation were suggesting that moving Dobot at 1% of its velocity should provide enough precision, but after new test, I have remark litlle trembling even for such a small move, which is potentially bad for print quality. And by the way, joins are really loose, which is totaly inacceptable in my opinion :/. Why do we have this problem, does it comes from bad mecanic part conception, or underdimensionned servo … or maybe only not tight enough screw? (let me dream ^^)

Concerning the testing, I was thinking about printing a lot of really small cynlinder during the same batch with different curing time to determine which one was the best for a layer; In my mind, it doesn’t seem be so hard, but I know I am often too optimist ^^.

I am still motivated to try this project, but I realize that it’s will probably be more complicated thant expected.



I thing that what Florent would like to do with a arm bot another company in kickstarter already do and very well but for 3000$ the full kit

So yes it’s possible to build a BOT ARM for 3D printing using SLS or PLD or SLA PLD with resin and place component on PCB but the ARM need to be build in another way maybe… I’m novice in BOT ARM but you see directly the difference of conception between makerarm and dobot…

I think both are wonderfull and perfect but for 3D printing Dobot need some upgrade and i’m sure in a near futur they will do because for me OPEN SOURCE is the best way to have very fast and very strong upgrade but makerarm is CLOSESOURCE and cost a lot of money unfortunatelly.

I wait your opinion and some ideas how to upgrade dobot to make the same like makerarm???

Best Regards,


Such an upgrade would require changing everything, starting with design. And it won’t cost the same then.

Besides, makearm’s design makes it not that fast in Z axis, which you would expect from a general purpose robotic arm.
This SCARA design would be faster in Z axis (look at the post from 05/03/2012). You could add reduction to have some compromise between speed and precision.