Control Panel Design Contest
The end-user is a major appliance manufacturer. The application is a machine that applies bends and twists to the tubing on the bottom of a refrigerator. The controls challenge was to reduce wiring, cabinet space and eliminate the 90-minute hard tooling change-over. Among four finalists that submitted tutorial videos on control panel design in 2010, subscribers voted online to select machine builder Specialty Tooling’s tutorial video as the winner.
Ryan Johann, automation engineer, explains: "When I’m laying out control enclosures, my thought process is,‘Where is it going to be easiest to bring my I/O cabling in from the machine, what kind of components do I need to have with 480 V ac, 3 phase, or 24 V dc? What’s the supply power? What kind of drives, controls, and communication cables do I need? And how can I think about how to isolate the highand low voltage, to keep noise out of the equation."
The control cabinet needs to be laid out to ensure everything is placed appropriately.
Enabling tools included Bosch Rexroth’s MLD-M control architecture. For the 4-axes application, Johann sought to reduce panel size. One master axis, with integrated PLC and motion control functionality, reduces the need for an external PLC that would take more panel space. The drives save space, wiring together with one wire, in a daisy chain, to SERCOS III I/O blocks.
Another space saving technique is having one point to terminate up to a three-wire sensor thus reducing the amount of wiring and time needed to assemble the panel.
A more traditional architecture would have required additional wiring to an external PLC or motion controller with I/O cards back to a separate portion of the panel. The Specialty Tooling control panel design saved about 25% on panel size, decreased wiring by 35%, and improved productivity by 15% by integrating Bosch Rexroth’s Safety-On-Board technology. Ordinarily the operator would need to drop the 480 V ac power to the drives in the work cell to load and unload the part. MLD Safety on Board technology meets safety requirements by putting the drives into a safe stop condition when the operator is in the work cell, Johann says.
Software from Bosch Rexroth helped Specialty Tooling program, integrate, and execute all project components, including PLC and motion programming, human-machine interfaces, and I/O connections.
Good tools help a smart design.
Thanks to all participants and voters, and 2010 contest sponsor, Phoenix Contact. Scroll down to link to videos and more information. Leave your comments or advice online.
Specialty Tooling 812.464.8521
Video finalists for 2010 are available for viewing, below.
Submit a tutorial video for 2011 here:
ATS Systems Oregon
Flash suppression panel and
| Watch Here -2010 finalist
Panel Design by Concept Systems
Teamwork is key to compete and exceed
The Art of Panel Building
at Premier Automation
|Watch Here – 2010 finalist|
Specialty Tooling Inc.
With integrated motion, logic, control and Safety-On-Board drive technology, Specialty Tooling’s control cabinet design is 25% smaller with 35% less wiring costs and 15% higher machine productivity.
|Watch Here – 2010 winner|