After comparing robot payload and reach, it is tempting to leave cables and hoses under “electrical installation, complete.” That creates a gap. A robot dress pack routes power, signals, data and process media from the robot base to the wrist and end effector while the arm moves. Unlike fixed machine wiring, the package must accommodate shoulder and elbow motion and wrist rotation. Cables, hoses, protective carriers, brackets, retractors, connectors and the replacement method all belong in the design.
In a Thai factory, a routing problem may remain invisible in a slow demonstration and appear only at production speed: the loop rubs a workpiece or fence, the wrist twists a cable, or maintenance cannot identify which section to replace. This guide concentrates on the moving cable path, rather than repeating a general robot, gripper or teaching selection article. It takes that path from requirements and quotation comparison to factory acceptance testing (FAT) and site acceptance testing (SAT). No universal bend radius, test count or service life is assumed; agree these for the actual robot, components and duty cycle.
Start with the worst robot pose, not a catalogue part number
The first inputs are the robot model, arm length and mounting orientation; every power, I/O, network and media connection at the tool; trajectories for all product variants; planned tool additions; and the fence and equipment around the cell. A route designed only around the most frequent motion may become taut in a rarely used recovery or tool change pose. A static clearance in CAD is not the same as clearance when an external loop swings during acceleration.
Make one route sheet showing the base anchor, shoulder, elbow and wrist retention points, free length, the source of every minimum dynamic bend radius and torsion limit, connectors, replacement sections, and no-contact zones. The robot programmer, mechanical designer, safety designer and local maintenance lead should approve the same revision. Use that sheet in both the RFP and acceptance tests so that an interface is not left without an owner.
Define what the dress pack includes
A dress pack is more than a corrugated tube. igus describes a multi-axis carrier system with brackets, retraction options, cables and hoses. ABB describes external, retracting external and integrated routes for different demands on wrist movement. These are vendor-specific products: never transfer a published capacity, changeover time or lifetime to another robot without checking the model and configuration.
Break the purchase into five layers. First, list the media: tool power, sensor I/O, network, air, vacuum and water, including present and future demand. Second, identify the protection and routing method, with part-specific flex and torsion data. Third, define fixed-to-moving boundaries: clamps, strain relief, brackets, free lengths and retractors. Fourth, specify connectors, pin maps, labels, spare assemblies and the unit of replacement. Fifth, require proof: physical checks of contact, tension and torsion across all specified modes, not only a 3D image.
The robot OEM may supply an upper-arm package while the integrator adds wiring from a connection point to the tool. If that boundary is left implicit, each party may assume the other owns the combined bend condition and warranty. Put each component on a bill of materials, identify who designs and installs it, who maintains it, and who confirms compatibility. For Thai operations, local stock and the practical time to replace a section matter as much as its purchase price.
External, retracting or integrated: choose for the motion
An external dress pack runs along the outside of the arm and is held by brackets. The path is visible and may be easier to adapt or replace in sections, but clearance from the workpiece, tool, fence and adjacent machines must be validated in motion. ABB describes its external product for less demanding wrist motion, with adjustable upper-arm free length. That statement describes the specified ABB product, not every external design.
A retracting external pack draws excess loop length back toward the arm. It may help where space is tight while retaining an external route. The retraction force, stroke, sliding points and local load still need product-specific checking. Adding a retractor does not, by itself, prove a longer life. ABB’s historical brochure groups its range into three variants; confirm present-day compatibility and supply for the robot actually ordered.
An integrated route passes through part of the arm and wrist. ABB’s LeanID materials explain how its design reduces exposed cable swing and helps access constrained spaces. An integrated path is still limited by robot model, wrist interface, number and type of media, spare capacity and replacement procedure. Verify the exact tool interface. Do not generalize ABB’s published service-life statements to another vendor or to a Thai cell with different duty, heat or chemicals.
Ask three questions to shortlist a route. Will an external loop approach a tool, workpiece or fence in the worst pose and during product change? How often will the tool or media change, and what spare connections are truly required? Can Thai maintenance replace the affected section in the allowable stop window? A compact cell with future tool additions may need an integrated route plus an explicitly engineered external section, depending on available capacity.
| Check | External | Retracting external | Integrated |
|---|---|---|---|
| Main reason to study | Visibility and changeability | Less loose loop near obstacles | Less exposed material at the wrist |
| Physical check | Loop, clamps and free length | Stroke, force and wear points | Media capacity and wrist interface |
| Maintenance check | Section replacement | Retractor and cable boundary | Internal replacement procedure |
| Do not assume | Static CAD proves dynamic clearance | Retractor guarantees life | Every tool will fit |
Check bend and torsion for each cable and hose
One bend-radius figure for the complete bundle is unsafe. Power, encoder, Ethernet and pneumatic components can have different manufacturer limits for dynamic bending, torsion, temperature and attachment. Tie every value to the exact part number and data sheet. Distinguish a fixed-installation cable from one rated for continuous multi-axis movement. The carrier’s radius does not override the tightest cable requirement inside it.
A robot bends at the shoulder and elbow, but it also rotates at the wrist. A path that looks gently curved can still apply damaging torsion or tension to conductors and shields. Review normal production, homing, emergency-stop recovery, maintenance retreat, teaching and changeover separately. A cable can be tightest in a rarely used retreat pose. Concentrated bending at a connector, abrasion on a bracket or a moving clamp calls for a route or free-length adjustment.
Mechanical protection is only part of the check. Review separation from power wiring, shield termination and grounding for communication cables. For air or vacuum, specify leakage checks and safeguards against a wrong reconnection after tool change. Water or process fluids require separate material-compatibility checks. Compare vendor environmental limits with the actual Thai cell, including heat, humidity, oil, coolant or weld spatter. Do not claim suitability from appearance alone.
Put complete inputs into the RFP
Attach nine inputs to the enquiry: (1) robot make, model, arm length, mounting and controller version; (2) programs and axis ranges for normal, homing, recovery, retreat and changeover poses; (3) current and future power, signals, network and media at every tool; (4) models of the workpieces, fixtures, fence, adjacent equipment and human access; (5) cycle, shifts, permissible stop time and process environment; (6) cabinet terminals, I/O list, network and connector standards; (7) maintenance location, working language and local spares policy; (8) FAT/SAT motions, variants and recovery tests; and (9) design-change approval and revision control. Ask bidders to list missing data and assumptions rather than silently fill the gaps.
Require separate prices for cables and hoses by part number and length; carriers, tubes, brackets, clamps and retractors; connectors; fabrication and installation; testing and evidence; site adjustment; drawings; and spares. “Dress pack complete” does not make two bids comparable. Compare replacement section prices, longest lead time, warranty premises and support availability in Thailand. A vendor’s advertised replacement time applies only under its stated product and work conditions; write a cell-specific acceptance scope.
Suggested RFP wording
The supplier shall design the moving power, signal, communication and process-media route from the robot base to the end effector. Submit the part numbers, manufacturer dynamic bend and torsion limits, anchors, free lengths, connector map and replacement sections. Demonstrate, at FAT and SAT, absence of contact and abnormal tension against the tool, workpiece, fixture, fence and adjacent equipment for all specified production, homing, recovery, retreat and changeover poses. Agree the acceptance criteria, program revisions, video and measurement evidence, and corrective-action process before design approval.
If future capacity is needed, specify the number and type of lines, connector pins, controller terminals and available space in the carrier. “Future ready” is too vague. When a tool changer is present, put its coupling interface and dress-pack harness termination on one interface drawing. Assign design, supply, installation, adjustment, validation and maintenance owners. An OEM upper-arm pack and an integrator’s final tool harness may each be individually approved while their junction is not; nominate one owner of that junction.
FAT must capture every mode in motion
At FAT, install the actual tool and representative workpieces. Check the route against the drawing, clamp stability, wrist torsion, bend limits, and clearance from fixtures and guarding. Test production speed and acceleration, not only slow teaching. Include stop and recovery, homing, retreat, product change and tool change. Set test repetitions and observation methods for the project and record the robot-program revision and cable part numbers.
Keep images or video that show the robot pose together with the cable and nearby objects; a component-level BOM; wiring and pneumatic drawings; bracket dimensions; bend and torsion basis; and replacement instructions. If marking a hose to observe migration, agree the marking and evaluation method in advance. Include the largest workpiece, the most rotated wrist pose and the closest fence path. If a variant cannot be tested at FAT, record it as untested with an additional acceptance owner and date. A still photograph of one pose cannot prove a dynamic route.
SAT checks local installation and maintenance
After installation, repeat the relevant motions in the actual Thai factory layout. The air source, cable tray, guard, floor, adjacent machine or maintenance access may differ from the FAT setup. Check homing and retreat as carefully as the normal cycle. A short SAT cannot establish lifetime under humidity or contamination; agree a separate inspection schedule based on component guidance, process risk and early observations.
Have local staff remove, refit and validate one representative replaceable section using the delivered procedure. Record access, lockout and safety steps, tools, consumables, spares, connector mistake prevention, any need to reteach and the retest scope. If a repair-time commitment is important, time the complete return to production, including preparation and functional checks, not only the minutes to unclip a part. Keep a Thai shop-floor instruction and any Japanese or English management copy at the same revision.
Daily or periodic checks can include abrasion marks, whitening or cracks in protection, clamp movement, tight bends near anchors, loose connectors, air leaks and intermittent network errors. Set the frequency from manufacturer advice and actual duty. When a fault follows a program, speed, tool or bracket change, record that sequence and review the route rather than treating the broken cable as the complete root cause.
Compare total stop exposure with explicit assumptions
A low kit price does not capture spare parts, repair work and cell downtime. A useful project-specific model is: expected annual interruption cost = expected replacements × (hours stopped × contribution margin per hour + repair labor + replacement parts). State where the expected frequency came from: a supplier claim, a comparable local cell or an engineering assumption. Vary uncertain stop cost and replacement frequency in a sensitivity table. Use the same start and end points for both suppliers’ repair times. This is a calculation framework, not a claim about how long any dress pack will last.
ABB’s older brochure gives life comparisons for its specified products and operating conditions. Do not transplant those figures into an unrelated installation. Obtain current product specifications, warranty terms and a manufacturer opinion for the proposed motion. A failure may also consume troubleshooting, work-in-process handling, restart and quality-check time. Conversely, excessive spare stock and unnecessarily complex retractors have a cost. Purchasing and production engineering should decide the right maintenance and stop tolerance together.
Control route changes after startup
A small robot-program edit can change cable swing. A heavier tool may cause different acceleration settings; a new part can require extra wrist rotation. Update the route sheet when a program, tool, bracket, clamp or cable part number changes. The change record should include the before-and-after revisions, reason, affected axes, worst tension and clearance poses, retest evidence and approver. Where complete retesting is impractical, explain which motions are excluded and why.
Adding one sensor requires more than a free connector pin. Check carrier space, signal separation, cabinet I/O and whether the extra cable stiffens the bundle. Same diameter does not establish equivalence: dynamic flex, torsion, shield, connector rating and termination must match. Treat a vendor’s substitute part as a design change. Local changes by Thai staff should be recorded on the same drawings as the original integrator design.
Plan fault isolation before a fault occurs
A dress-pack fault may appear as a network dropout at one pose, unstable sensor readings during acceleration or delayed air pressure, not just a visible tear. Deliver a first-response procedure with SAT. Time-align alarm, robot pose, program and product, tool state, communication log and media pressure where available. Secure the cell, inspect anchors and surfaces, then connectors and hoses, and finally electrical tests. Pulling on a suspect cable to reproduce a fault can damage healthy material. Photograph the route before replacement and retain failed parts. Repeated failure at one point should trigger a route and program review.
For a night shift in Thailand, confirm the support language, spare location, emergency delivery and remote-access permissions. Labels, diagrams and inspection sheets must be usable by the people who actually maintain the cell. Acceptance evidence should identify robot serial number, dress-pack part numbers, program revision, tested poses and speeds, date, camera viewpoint, contacts found and corrective actions. For numerical clearance or bend criteria, define both the measured objects and method before testing.
Procurement checklist
- Have you supplied robot model, mounting and all normal, recovery and retreat trajectories?
- Are present and future tool media separated and counted?
- Is each proposed dress-pack variant compatible with the exact robot model?
- Are dynamic bend and torsion limits tied to every cable or hose part number?
- Does the route drawing show free lengths, anchors, junctions and replacement sections?
- Will FAT run production speed, recovery, changeover and tool change?
- Will SAT repeat checks against the real site layout and maintenance access?
- Are Thai spares, local support and Thai instructions agreed?
- Who orders a route reassessment when software, tooling or brackets change?
This list helps the buyer define evidence, not demand the most expensive product. For investment economics across the complete cell, read our robot implementation ROI guide. For the responsibilities at the integrator boundary, see how to select a robot system integrator. This article covers the moving route inside that broader procurement decision.
Turn quotation gaps into a common supplier questionnaire
Do not merely mark components as included or excluded. Ask every bidder the same questions: Which pose produces the greatest cable tension? Who measures it and against what acceptance criterion? After a tool change, must the entire upper-arm assembly be replaced or only a wrist section? Which substitute parts are permitted during a shortage? Which programs must be retested after replacement? An unanswered item is an undefined task, not a saving. Separate price differences caused by component specification from those caused by omitted tests, drawings or spares.
If a bidder says the route is adequate for “normal motion,” replace that phrase with a list of programs. Include daily production, fault recovery, clearing a jam, fixture change and maintenance retreat. If a guard may move, state the planned range. Where inputs remain open, record the quotation assumption, redesign price and validation owner. This makes later scope changes visible.
Specify deliverables as well: a 3D route model, 2D replacement drawing, BOM, connector pin map and maintenance photographs. After the integrator edits the robot program, verify that the as-built drawing still matches the machine. Replacing a FAT hose with another brand at SAT needs approval and reassessment. The accepted baseline must describe the cell actually running, not the earlier concept.
In a multilingual Thai plant, part numbers and location IDs should be a shared key across Japanese, English and Thai instructions. A local technician must be able to identify the correct section and safely follow the procedure during a replacement exercise. For night shifts, include the contact, stop decision and restart approver on one site sheet, with reference photographs of normal and abnormal conditions.
Frequently asked questions
Is a dress pack included with a robot purchase?
It depends on the model and option list. Even where an OEM supplies an integrated or standard upper-arm package, tool-specific media and the cell-side interface may be separate. Check the OEM/integrator boundary, compatibility and warranty in the quotation.
Does an integrated route always last longer?
No general answer follows from the route name. Cable specification, trajectory, speed, environment, anchors and maintenance all matter. ABB explains the protective benefits of its own LeanID design, but its published experience is not a universal prediction. Verify the proposed parts and test in the intended cell.
What bend radius should we specify?
Use each cable, hose and carrier manufacturer’s dynamic rating for the selected part number and duty. Design around the strictest component and worst pose, then validate physically. Do not substitute a rule of thumb for the actual data sheet.
Is FAT enough?
FAT confirms the pre-shipment build. SAT tests the installed route, adjacent machines, site utilities and maintenance access. Contract for both. Track product variants or poses that remain untested until a later acceptance event.
Discuss your cell with TOMAS TECH
When seeking a review of moving robot media in a Thai factory, share the robot model, tool-media list, 3D layout, normal and recovery programs, observed cable faults and maintenance arrangements. TOMAS TECH can help define the poses to inspect and the boundaries to include in the RFP. Use our English contact page.
Primary sources
- ABB External DressPack: ABB’s external product configuration and adjustable brackets.
- ABB DressPack Application Equipment & Accessories, ROB0066EN_C: three ABB variants and model-specific details; 2016 document, so reconfirm current compatibility.
- igus robot dresspacks and cable management systems: multi-axis carriers, brackets and retractors.
- igus robot cable management solutions: routing components and configuration.
- ABB Integrated DressPack LeanID: integrated-product description; confirm applicability to the selected model.
- igus triflex RSP assembly instructions: mounting points, length and retraction adjustment.
