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Bin pick­ing appli­ca­tion: Robot takes over machine loading

MANN+HUMMEL – SPEYER IN MOTION

2D BIN PICK­ING: ROBOT TAKES OVER AUTO­MATED LOAD­ING OF A SCREEN PRINT­ING MACHINE

CHAL­LENGE

At the Mann+Hummel plant in Speyer, Ger­many, the com­pany was look­ing for a solu­tion to auto­mate the load­ing of a screen-print­ing machine with air/oil sep­a­ra­tors. A worker pre­vi­ously car­ried out this very monot­o­nous and non-ergonomic task manually.

Now, a cobot from Uni­ver­sal Robots should be used pick­ing two air/oil sep­a­ra­tors from a grid box and plac­ing them on a timed con­veyor belt, on which the fil­ters are trans­ported to the screen print­ing machine for printing.

Since the fil­ters are pro­vided par­tially sorted in sev­eral lev­els with inter­me­di­ate stor­age, one chal­lenge was the cor­rect detec­tion of the part posi­tion. Another require­ment was that the detec­tion jobs could eas­ily be adapted to new vari­ants of the filters.

APPLI­CA­TION

In order to keep the robot appli­ca­tion flex­i­ble and to be able to switch back to man­ual load­ing if, for exam­ple, the robot has to be adapted to a new prod­uct, it was decided to use a cobot in com­bi­na­tion with a light grid to ensure safety. A Sen­soPart vision sen­sor that is mounted above the feed­ing box and that is directly con­nected to the robot should han­dle the detec­tion of the pick­ing position.

The entire pro­gram­ming of the cobot, includ­ing the con­nec­tion between vision sen­sor and cobot, was finally car­ried out using the soft­ware ArtiMinds Robot Pro­gram­ming Suite (RPS).

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“The suc­cess­ful imple­men­ta­tion of our pilot plant in Speyer has proven that with suit­able com­po­nents and the right soft­ware, even com­plex robotic appli­ca­tions can be flex­i­bly imple­mented by our own employees.”

SASCHA MUM­MERT
Tech­nol­ogy and Process Engi­neer at Mann+Hummel in Speyer

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SOLU­TION

ArtiMinds RPS makes it pos­si­ble to gen­er­ate robot pro­grams intu­itive and sim­ple by drag and drop of pre­de­fined blocks (“Tem­plates”). The desired task sequence can be put together in a mod­u­lar way and the sub­se­quent para­me­ter­i­za­tion of the tem­plates is done either offline in the CAD envi­ron­ment or online with the real robot with an intu­itive wiz­ard sys­tem. This allows the user to focus com­pletely on the actual process and its imple­men­ta­tion, which offers much more flex­i­bil­ity, espe­cially when doing first steps in the field of robotics and gain­ing ini­tial experience.

By includ­ing the CAD model of the grid box in the 3D sim­u­la­tion envi­ron­ment, the cell lay­out could already be checked in regards to col­li­sions and reach­a­bil­ity of the cobot dur­ing cell plan­ning. With this setup, col­li­sions could auto­mat­i­cally be avoided dur­ing robot pro­gram­ming. ArtiMinds RPS´ inter­nal inter­face min­i­mized the setup effort for the vision sys­tem and ensured a sim­ple and stan­dard­ized trans­fer of data to the robot.

The result: A trans­par­ent robot pro­gram that is autonomously exe­cuted by the robot with­out hav­ing writ­ten a sin­gle line of robot code. ArtiMinds soft­ware does not have to be present dur­ing exe­cu­tion since native UR Script code was generated.

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“Our goal was to proof the pos­si­bil­i­ties of cur­rent robotics tech­nol­ogy and build up appro­pri­ate inter­nal know-how.”

Sascha Mum­mert, Tech­nol­ogy and Process Engi­neer at Mann+Hummel

Take Aways of the Bin Pick­ing application:

  • ArtiMinds RPS sim­pli­fies the pro­gram­ming of sen­sor-based appli­ca­tions. In com­bi­na­tion with sen­sor tech­nol­ogy, even the pro­gram logic for cobot appli­ca­tions can quickly become very complex.
  • The boxes are avail­able in dif­fer­ent vari­ants. It was there­fore impor­tant that the detec­tion jobs could be eas­ily adapted.
  • Exter­nal influ­ences in pro­duc­tion could not be com­pletely ruled out, so robust detec­tion had to be ensured.
  • The installed appli­ca­tion was to serve as a basis for fur­ther sys­tems and the pro­gram cre­ated should there­fore eas­ily trans­fer­able to a new hard­ware setup.
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