So i am doing this little home project: [image] Its a small Dobot MG400 robot arm that takes my families old pictures, put them into a scanner, takes them out and on and on it goes. [image] It works using TCP, so I will inject a command and the robot arm will start doing that command. Once the…

One way: Set your commands in a array e.g ["op1","op2","opn"] Feed that into a split node. (That will cause them to be split and released 1 at a time) Use something to queue the stream of messages and release them once you get a response (I'd use node-red-semaphore-plus (node) - Node-RED )

Wow, what a cool project - looks like a lot of fun! [image] Palmhoej: I am not quit sure how the best way to approach this. Does the robot answer with state information, i.e., "the arm is at this position" - if so then you can have a switch node that ensures the appropriate command for the p…

I used your suggestion and now it looks like this and it works. Feel free to criticize, that's the only way we can learn :slight_smile: [image] So, the next thing I need to solve is a mechanical "issue": When I apply a vacuum to the photos on the scanner, the suction goes right through the pictur…

[image] Palmhoej: instead of the robot lifting the picture as intended, it tries to lift the whole scanner You could strap a gecko to the robot arm and use his sticky feet. A cyborgecko. https://stanforddaily.com/2023/02/01/lab-develops-stickiest-non-sticky-material/

I could, but then I would also have to make the automatic feeding and watering system for him... and I am also a little bit skeptical about the reliability, how do you keep him motivated to keep taking photo number 151 of Aunt Gerdas infamous boring birthday party out of the scanner? I do not want t…

[image] Palmhoej: how do you keep him motivated to keep taking photo number 151 of Aunt Gerdas infamous boring birthday party out of the scanner? Perhaps you could train him to simply eat the boring photos! :rofl:

[image] Palmhoej: When I apply a vacuum to the photos on the scanner, the suction goes right through the pictures (a photo is apparently VERY permeable), so instead of the robot lifting the picture as intended, it tries to lift the whole scanner... to be continued One possible approach might …

Best practice for sequential operations on a robot?

General

Colin 27 January 2025 09:23 4

To guarantee that one command is finished before the next is started you can use this simple flow to run them sequentially. "wait until" node changed behavior after recent update - #2 by Colin

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Best practice for sequential operations on a robot?

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