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Technical Cable Applications Blog

Wire Harness vs Cable Assembly

To those of us who work as cable assembly manufacturers every day here at Technical Cable Applications, as soon as we learn about the application a client is needing, we will typically know whether a wire harness will do the job, and when a more robust cable assembly is required. However for just about anyone else who doesn’t work with cables every day, it’s likely that the terms “wire” and “cable” will seem somewhat interchangeable. It’s also even more likely that your average consumer wouldn’t know the difference between a harness and an assembly as those also sound very similar, and again wire versus cable sounds like you’re comparing the same thing. This will be a quick refresher on the difference between a wire harness and a cable assembly, and when one or the other is most likely to be used.

Wire Harness

Wire harnesses are the most basic way to configure any product or project that needs a couple or more wires strung together to connect one item to another. As long as the wires are in a safe place without extreme temperatures, pressure, or other physical danger, oftentimes this simple configuration of attaching a few wires together to ensure that everything will get the power or data transfer needed is more than sufficient. Wire harnesses are extremely cost efficient and will more than suffice for many indoor applications, or applications where the wires will be protected by a product’s pre-existing external shell or casing, i.e. computer servers or refrigerators.

Cable Assembly

The primary difference between a wire harness and a cable assembly is that a cable assembly will not have single exposed wires, and will always have multiple wires braided together and covered in some sort of protective sheath or coat. Cable assemblies are most important to use when there is no additional protection for the wires from the elements or when the connection has to hang rather than being precisely placed and mounted. This is because the protective sheath will ensure that the cables are protected from damage even if they are visible outside the product or machinery they are powering. Cable assemblies can be encased in all sorts of different types of protective materials for many different applications, so whether your cables need to continue working in harsh outdoor environments, or extremely hot factory/industrial conditions, there is a method and a material for your needs that will protect your cables and keep them working. Some industries use cable assemblies more frequently as well due to their general durability and the fact that protective sheaths can also prevent data loss, which is excellent for the military and medical fields who need both high durability and fast data transfer in emergency scenarios.

Hopefully this guide is helpful for anyone who is not familiar with the nuances between cables and wires. If you’d like to learn more, WHMA.org has an excellent guide they’ve published as well that is more in-depth than what we wrote here. Meanwhile if you are in need of a manufacturer for your bulk cable assembly or wire harness needs, please give us a call or send your cable drawing to us via our contact form so we can get started.

 

 

m12 cable

Custom M12 Cables: Tailored Solutions for Automation and More!

In the increasingly fast-paced world we live in today, automation is becoming not just a plus to have for many businesses, but a necessity for improving operational efficiency to meet budget and time restrictions. When not just a few, but all of the biggest players in any industry have begun implementing automation into much of their production, manufacturing, and processes, automation is no longer a luxury, but a necessity. This is the case for leaders in all kinds of industries including robotics, aerospace, logistics & shipping, military, medical and so many more. It’s simply not an option to avoid using automation for companies providing services across the nation or the world, because you will fall behind the competition in terms of efficiency. This includes software applications like artificial intelligence which are now becoming more prevalent, or the types of automation we’ve specialized in providing cables for since our founding in 2002.

One of the most frequently used and important types of connectors that power this automation is the ever reliable, compact and powerful M12 connector and the specialized cables we build that utilize said connectors. There are many variations on the standard M12 connector including the older M5, M8 and RJ45 styles that are all still extremely popular, and even within these types there are hundreds of different styles with the numbers of pins used, materials utilized, type of signal to be carried, and all sorts of other variables. We are experts in all of the possible variations, and even if you can imagine an M12 cable assembly with an exceedingly unusual configuration, we’ve probably manufactured something similar before due to our many years of experience and the plethora of businesses we’ve done orders for.

As a custom M12 cable and cable assembly manufacturer, here at Technical Cable Applications we specialize in crafting custom and off-the-shelf solutions tailored to meet the precise needs of our clients. We are ISO 9001:2015 and UL certified for cable assembly and are extremely experienced with M12 cables and assemblies and all the intricacies of the different kinds of M12 connectors, how they work with other types of connectors that we can also provide, and ensuring that they will be protected and durable for all your needs. You can trust us to manufacture your M12 custom cables order perfectly no matter how complex the specifications are.

Don’t miss out on the opportunity to enhance your automation systems with our custom M12 cables that will provide exactly what you need and be built to last. Call us today or submit your cable drawing on our contact page to discuss your specific industry requirements!

Bills of Material and Material Callouts

Material callouts

It can be incredibly helpful on a drawing to call out with a pointer where material should be used on the drawing.

 

  • Best practice is to callout items numbers on the physical layout, usually with a circled BOM item#.
  • This makes it much easier to identify which parts should be used together and where they should be used.
  • It’s also sometimes helpful to simply write part numbers directly next to items on a drawing.

 

 

 

 

 

 

 

 

 

Bills of Material

  • Best practice is to give a table with item numbers, those item numbers can be used for material callouts in the drawing.
  • Manufacturer part numbers for all components is ideal for all parts, except maybe where we stock generics like UL wire and heatshrink
  • We can certainly help with simplifying a BOM, but knowing exactly what materials we’re expected to use can be very helpful!

 

Custom Cable Assembly

The First Article Process

The First Article Process is a crucial part of production requirements at Technical Cable Applications.  The process confirms that an assembly has been designed as intended and that documentation is complete and interpreted correctly.  It verifies that proper assembly techniques and tooling are used and assures that later builds of product are produced without variation.

Quotation

At TCA the first article process starts before an order is ever placed.  During the quote process the customer drawings or specifications are carefully reviewed.   This assures that all the elements for successful production are included.

The bill of materials is evaluated to make certain all the components shown on the drawing are called out and in the correct quantities.   They are looking for any obvious material conflicts such as wire size /terminal compatibility.  A mismatch like this could be because the insulation diameter or wire AWG is too large or too small for a terminal. Discrepancies like this could affect the integrity of the product or damage tooling.

The drawing is checked for clear dimensional criteria and for tolerances that are achievable for cable assemblies.   It is also reviewed for references to any documents or quality standards other than IPC.  If other quality documents are referenced Technical Cable Applications quotations specialists assure those documents are on file.

Tooling and Test Fixtures

During the quote process tooling requirements are checked for all the components.  At Technical Cable Applications the component manufacturers recommendations are checked to assure that the right tools are on hand.   It is verified that mating test fixtures are available for all connectors.  If either of the tooling or test fixtures are not on hand, they will need to be ordered for the build.

Work instructions

Work instructions are created by Technical Cable Applications production engineers.  These seasoned professionals have broad knowledge and training in cable assembly production and quality standards. For cable assemblies this would be to the IPC/WHMA -620B standard.  If there are other production or quality standards called out in the customer documentation the production engineers will obtain a copy and make sure they are part of the process.

The work instruction lists all the machines, tools, fixtures, and materials used.  It contains set up and programming instructions for any equipment used.

A Detailed Accounting

As the production engineers build the first article, they keep a detailed step by step accounting for every process used to build the assembly and in the order it is to be completed.    Special instructions and cautionary notes are often part of the instructions with detailed pictures for each step included.  The completed work instructions are controlled on a central server and every workstation has a computer terminal with to access the information.

In the event the production engineer finds any issue, conflict or has any concerns during the first article build the Sales Specialist is notified, the customer is contacted, and the concern and any resolution are documented.

Test and Inspection

Test and inspection steps are included in the work instruction including inspections where a process might be hidden by a subsequent step.

The finished first articles are sent to the Technical Cable Applications quality department where the assembly undergoes a series of dimensional and quality checks to assure that the assembly meets or exceeds the customer specifications.  The first article assemblies are tested and sent to packaging to be shipped with first article documentation to the customer.

Validation

Once the first article is inspected, tested, and approved by the customer the work instructions are validated by Technical Cable Applications quality personnel.  Production can then be scheduled for the assemblies.

Contact

Technical Cable Applications is an ISO9001:20015 registered company.  Please contact the Technical Cable Applications sales team for help with all of you cable assembly needs.

Cable Assembly Drawing: Physical Layout Recommendations

Creating an assembly drawing that’s easy to understand and interpret as a blueprint for your cable assembly needs can be pretty difficult, so here are the basics if you’re learning, and some additional pointers to help you improve your cable drawing capabilities at the end too.

What Should My Blueprint Include?

Here are the most basic components that fabrication drawings typically cover for the physical layout and dimensions of the cable assembly. This section will be most helpful if you’re completely new to the process of drawings cable assembly, and are trying to draw a custom cable assembly drawing or OEM electrical cable for the first time.

  • Specify the length of the entire cable assembly or wiring harness, and individual wire or cable lengths in exact measurements
    – Any extra electrical or cable components that will be manufactured should also have length specified
    – Branches and breakout points should also have measurements specified
  • Note the placement of all cable connectors and specifications of which mating orientation is used where for interface cable
    – It should be clear whether male or female connectors are being used along with the general type of cable connector
    – Ideally cable connectors will have exact sizing and measurements as well noted here to ensure that the right ones are used
  • Include any details about cable strength and bending needs
    – Minimum cable bend radius is a common specification as over-bending will damage many cable connectors and cable types
    – Strain relief locations, these are typically the areas that are least likely to break when the cable is under pressure

More specific components like connector pinouts, wiring details, assembly sequences, cable kits, etc. may only be needed later in prototyping, or not at all if the cable assembly is simple enough to examine and build.

Drawing Assembly Specifications: Best Practices for Cable Drawings

Here are some additional tips for how to optimize your cable assembly drawing and what is most important to include.

  • Right angles are easiest to interpret but not always necessary.
  • It should be clear where to measure dimensions from, like end of connector or back of connector (dimension lines are great!)
  • Dimensions should be measurable from places which can be measured on a completed assembly (wire cut lengths can be hard to inspect). We will 100% check these in final inspection.
  • Length tolerances should be wide enough to be easy to manufacture+/-5% is great. Use a -0 tolerance if nominal length is the shortest acceptable. (IPC has guidelines for this as well)
  • Labels and heatshrink should appear on the drawing with dimensions and tolerances (or specified as “about” or “TYP”)
  • Specifying the pinout of the connector, especially with colors, is very helpful. Best practice is 3rd angle projection of the connector face.

IPC Certification

TCA has a keen focus on the best possible product quality. Our assemblies are built and inspected to IPC/WHMA-A-620 standards as required by our customers.  This training covers requirements and acceptance for wire and cable harness assemblies. “These certification programs, built around IPC standards, developed and approved by industry, are delivered in a classroom setting by IPC certified trainers. As a non-profit, member-driven organization and leading source for industry standards, training, industry intelligence and public policy advocacy, IPC is THE global association that helps OEMs, EMS, PCB manufacturers and suppliers build electronics better. ” IPC Web site    TCA takes pride in delivering quality by focusing on standards based engineering and assembly.   



Off-The-Shelf Cable Assemblies

Off-The-Shelf (OTS) cable assemblies are already made cable assemblies and wiring harnesses for a variety of standard applications.  There are tremendous advantages to purchasing off the shelf product.  Most notably are lower cost and immediate delivery.  Technical Cable Applications is best known for the custom cable assemblies and wiring harnesses produced in our Auburn, Washington facility.   TCA also offers a huge variety of Off-The Shelf cable assemblies that are in stock in warehouses throughout the country.

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Cable Assemblies in Arizona

I mentioned in a previous post that TCA had expanded both here in Auburn, WA as well as the Southwest.  Formally, I’d like to introduce you to Jim Henderson who represents our Southwest business. Located just outside of Phoenix, AZ Jim comes with years of experience in structured cabling, wire harnesses and cable assemblies.  Jim is on the ground in Arizona and available to visit your facility for consultation and to review your requirements. He comes fully supported with a strong engineering team behind him available to help with costing, tooling, first articles, work instruction creation and eventually getting your assemblies into full scale production.  You can reach him immediately by calling our main line (253) 289-5572.