玫瑰、機器人和一個願景

在機器人的協助下進行玫瑰種植早已成為可能, 而 Aventec 公司創辦人 John van de Ven 又將這項技術更向前推進了一步。身為合作夥伴,Festo 了提供最新的技術和創新思路。VTUX 閥島可謂如魚得水。

身為電氣工程師,Van de Ven 精通機器人和影像處理,領導 Aventec 共同完成了一系列過程自動化專案。2013 年,Aventec 成立之初,Van de Ven 主要從事臨時專案管理任務。如今,負責溫室園藝方面的工作。前雇主(其公司已不存在)的客戶找到了他,他很快全副精力投入打造培植盆栽玫瑰的機器之上。經過多年使用後,這些機器現在急需進行維護和保養。經過初步清點後,公司發現僅僅養護工作遠遠不夠,於是 Van de Ven 開始著手開發。

「為了讓切割機繼續工作,需要使用新元件改裝機器。使用的零件中有許多已經達到了其使用壽命。於是,我們決定使用由 Festo CPX-E plc 平台控制的現代化伺服技術,對機器進行重新設計。由於需要配置現代影像處理系統,許多零件需要從頭開始重新編程。打造快速且可靠的機器,讓客戶多年後仍然可以放心使用。

技術上的新發展提高了機器的速度和精度。

為更確實掌控機器的交付時間及其未來的可靠性,他決定自己生產機器。為了協助您瞭解其複雜性,我們需要簡介機器的功能。在生產線起點,工人手動將玫瑰枝條掛在運輸系統中。每個插枝被掛到支架中,運送到處理單元。在處理單元中,插枝被放置在影像處理系統前,旋轉 180° 進行 3D 掃描。這是為了獲得最好的插枝。然後,機器人對插枝進行適當修剪,直接種植到新的花盆中。全部這些操作都以極快的速度和極高的精度完成。整台機器有四個「切割站」,每小時可修剪和種植最多 5,200 根插條。

在開發機器過程中,Van de Ven 與 Festo 取得了聯繫。「他們從一開始就在各方面的設備選擇和整合方面給予了協助。車削和修剪是相當重要的環節。為了瞭解如何利用 Festo 元件實現這一目標,我們將玫瑰枝條及其支架送到了 Festo 位於荷蘭 Delft的研發中心。一週後,我收到了團隊發來的影片,其中展示了最新的成果。我對他們在一週內取得如此大的進展感到驚訝!隨後,我們開始使用 Festo 元件製造了一個測試模組,並邀請客戶親自前來觀摩。」

全部元件一站式採購:「只要有可能,我都使用 Festo 的產品。」

Van de Ven 希望盡可能一站式採購全部元件。「只要有可能,我都使用 Festo 的產品。否則,如果出現故障,供應商之間可能會互相推諉。而受影響的將是最終使用者。」 目前,模組包括 Festo 的直線導軌和氣動裝置、PLC、人機介面 (HMI) 和閥島。現在,我們已經使用全新開發的模組完成了整台機器的改裝並投入運作。由於影像處理需要這種計算能力,每個模組配有自己的 PLC。對主控制系統,我們使用人機介面和新的閥島。在機器開發過程中,Festo 的產品開發也照常推進,使我們能夠切換到最新的人機介面。之前在上一代產品上完成的工作能夠相當輕鬆地轉移到新一代產品上。平台速度大幅提升,同時我們保留了原有結構。」Van de Ven 對在此過程中 Festo 提供的支援贊不絕口。「Festo 考慮了對特定解決方案的需求。如果某個功能也能透過氣動裝置來實現,為什麼還要使用步進馬達呢?」

The greatest added value is the time saved

According to Van de Ven, the greatest added value is the time saved. "We save hours of work, so the purchase price is recouped very quickly." But Holt and Van de Ven also want to mention the data communication. The new Festo automation platform CPX-AP-A offers various communication options for fast and error-free IO between components and with extended diagnostic functions. Holt: "If a cable breaks somewhere, for example in one of the sensors, the breakage point is visible right away." And it's very simple, he explains: "All tags are read into the VTUX, you just have to assign them." Van de Ven uses 9 of the new valve terminals per machine. For each rose cutting module there is one terminal at the top, one at the bottom and one on the main device.

The speed is often decisive for the required force and stroke. Because the work is carried out in a dirty and dusty environment, cylinder contamination is also a consideration. The VTUX has an IP 67 rating, which is an important and decisive factor in the operating conditions for this application.

"I have complete confidence in the Festo team"

Van de Ven was one of the first VTUX customers in November 2023. "When Festo develops something like this, I don't want to use it straight away. But I've been to the factory in Esslingen and when you see how thoroughly and extensively everything is tested there, I have complete confidence in the Festo team." And the collaboration with Holt is also running very smoothly. "I show them what I need and Jeroen shows me the options. We went through the whole machine together; we then decided together what we wanted to do and he came back with the answers and more information. We want the machine to still be operational in ten years' time, so the end-of-life expectation is important, and Jeroen thinks about the new developments with us." Holt nods in agreement. "Thinking together is really crucial. I know the whole process and we start from a basic idea with unresolved questions. I like doing it that way."

It is plain to see that Van de Ven is satisfied. "We have written our own algorithm to speed up the entire process. To do this, we needed more computing power than in the old system. And we more than succeeded. We also wanted to separate two unique processes that run simultaneously. That is why we have two queues, each with its own core in the PLC. The cycle time is and remains crucial. We are now at four milliseconds and have set our sights on two."