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PETG is the best default filament for most rigid guitar-controller accessories, including strum bars, mounting blocks, brackets, adapters and replacement covers. It is tougher and less brittle than PLA, has better heat resistance, and is still easier to print than ABS-class materials. Choose PLA for a cool, lightly loaded cosmetic part or a quick prototype; choose TPU (a flexible filament) for grips, sleeves, bumpers and grommets that must bend or cushion rather than carry structural loads.
The right choice also depends on the part’s geometry, orientation and environment. A well-oriented PLA bracket with thick walls can outperform a poorly oriented PETG bracket, while a TPU strum bar can feel soft and deform when the design requires rigidity. The guide below matches each accessory role to a material, explains the trade-offs, and gives a practical print-and-fit workflow.
What filament should you use for a guitar-controller accessory?
For a rigid accessory that will be handled repeatedly, start with PETG. It offers a useful middle ground: more impact tolerance and heat margin than PLA, stronger interlayer behavior for many functional geometries, and less warping and equipment demand than ABS, ASA, nylon or polycarbonate. This makes it the sensible first choice for most Guitar Hero, Clone Hero and similar controller modifications.
Use the following matrix before selecting a spool. It separates the job the part must perform from the material’s general reputation.
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| Accessory role | Recommended filament | Why it fits | Main caution |
|---|---|---|---|
| Strum bar, mounting block, adapter or bracket | PETG | Tougher and less brittle than PLA for repeated handling; documented for StrumFix-style parts | Tune stringing, retraction, bed adhesion and dimensional fit |
| Cosmetic shell, faceplate or prototype | PLA | Easiest printing, crisp detail and low-cost iteration | Lower impact and heat margin; avoid thin, highly stressed features and hot locations |
| Grip, sleeve, bumper or grommet | TPU/Flex | Bendable and compliant for soft contact surfaces | Not a replacement for a rigid structural part; print slowly and verify clearances |
| High-heat or outdoor part | ABS/ASA, or possibly nylon or polycarbonate | Higher temperature or ultraviolet capability than PLA or PETG | Needs a suitable printer, enclosure, ventilation, drying and controlled profiles |
| Tiny switch keycap or plunger | Resin where the design specifies it | High-resolution geometry can exceed ordinary FDM filament capability | Follow the controller design’s material specification instead of substituting a generic filament |
That table is a starting point, not a guarantee. Wall thickness, the direction of the layer lines, the number of perimeters and the fit of mating parts can matter as much as the polymer.
Why is PETG the best default for rigid controller parts?
PETG is commonly used for mechanical parts because it combines toughness, useful flexibility and heat resistance without the demanding print conditions associated with ABS-class materials. FIRST Tech Challenge’s filament guidance describes PETG as a common material that some users consider an upgrade to PLA, while noting that PETG is less brittle and more heat resistant than PLA. Prusa’s material guide likewise places PETG among materials suited to mechanical parts and identifies flexible filament as bendable.
It tolerates handling better than PLA
A strum bar or adapter is pulled, pressed and occasionally knocked against a desk or controller shell. PLA is easy to print but can be brittle under shock, so a thin snap feature or a sharp internal corner may crack sooner than the same geometry in PETG. PETG’s greater toughness gives those features more margin when the design is otherwise sound.
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Controllers may be stored in a car, near a window or beside warm electronics. PETG generally tolerates more heat than PLA, reducing the chance that a cover or mount slowly softens in a warm location. This does not make PETG a high-temperature engineering plastic; for sustained heat or outdoor exposure, evaluate ASA, ABS, nylon or polycarbonate with the printer and enclosure those materials require.
It is less demanding than ABS-class filaments
ABS, ASA, nylon and polycarbonate can be appropriate when temperature or ultraviolet resistance is the primary requirement, but Prusa’s material guidance identifies more demanding temperature and hardware conditions for them. They may require an enclosure, ventilation, carefully controlled profiles and, for moisture-sensitive materials, drying. PETG usually lets a hobbyist obtain functional strength without adding all of that equipment.
Is PETG stronger than PLA for controller accessories?
“Stronger” depends on the failure you are trying to prevent. PETG is generally the safer choice for impact, repeated flexing and warm environments, while PLA often wins for stiffness, sharp detail and predictable first prints. Compare the properties that affect the actual accessory rather than choosing by tensile-strength marketing alone.
| Decision factor | PETG | PLA | What it means for a controller part |
|---|---|---|---|
| Rigidity | Rigid enough for mounts and bars, with some give | Typically feels stiffer | PLA can make a crisp faceplate; PETG is more forgiving when a part is knocked |
| Impact toughness | Higher tolerance for shock and repeated handling | Can be brittle under shock | Favor PETG for strum mechanisms, brackets and thin tabs |
| Heat exposure | More heat resistant than PLA | Lower heat margin | Use PETG when storage or operation may be warm |
| Print difficulty | Manageable, but stringing and adhesion need tuning | Usually the easiest option | PLA is useful for fit prototypes and cosmetic iterations |
| Layer adhesion | Often good for functional prints when profiled correctly | Can be adequate, but shock-sensitive designs need care | Orient stressed features so loads do not split layers |
| Surface finish | Functional finish; strings may need cleanup | Sharp detail and broad color range | Choose PLA when appearance is the primary objective |
| Equipment | Usually printable on a standard FDM machine with a suitable profile | Broadly accessible | ABS, ASA, nylon and polycarbonate impose more hardware and process requirements |
The practical verdict is not that PETG replaces PLA everywhere. Print a PLA prototype when you need to confirm dimensions quickly, then use PETG for the version that will take repeated abuse. If the final piece stays cool and carries little load, PLA may remain the better value and the cleaner-looking result.
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Which filament works for a Guitar Hero strum bar?
Use PETG for a rigid strum bar that will be actuated repeatedly. Byte Arts’ StrumFix documentation explicitly lists PLA or PETG for strum bars, adapters and mounting blocks; PETG is the more conservative choice when the bar has thin levers, snap features or frequent impacts.
When PLA is acceptable
PLA is reasonable for a thick, well-supported bar used gently, for a replacement that stays in a cool room, or for an inexpensive prototype. Avoid very thin stressed sections and sharp inside corners. If the first PLA version fits but cracks during use, change either the geometry or the material rather than simply increasing infill.
Fit and actuation checks
A strum bar must move freely without rubbing the controller shell and must reliably return the switch. Print a small section or a low-cost test version first. Check the pivot, switch contact and end stops before committing to a long print. PETG’s toughness cannot compensate for a bar that is misaligned or binds against the case.
Can you print controller grips, sleeves and bumpers in TPU?
Yes. TPU and other Flex filaments are intended for parts that bend or cushion. They work well for a grip over a rigid handle, a rubber-like sleeve, a bumper that absorbs contact, or a grommet that isolates vibration. Prusa’s guitar-accessories article demonstrates a flexible filament used as a rubber sleeve.
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A flexible strum bar or mounting arm can feel vague, deform under force and fail to return a switch consistently. Use a rigid core—typically PETG or PLA—and reserve TPU for the surface that needs compliance. For a sleeve, confirm that the inside diameter remains large enough after the material’s elastic recovery; for a grommet, test compression in the assembled controller.
Printing considerations
Flex filament normally needs slower, controlled feeding and careful tolerance checks. Follow the filament manufacturer’s profile, keep the feed path as constrained as the printer requires, and print a small calibration piece before a full-size grip. A design that is dimensionally correct in PLA may be too tight when printed in TPU because the flexible walls deform during insertion.
When should you choose PLA instead?
PLA is the right tool when simplicity, detail or rapid iteration matters more than impact and heat resistance. It is easy to print, produces clean cosmetic surfaces and is useful for shells, faceplates, decorative buttons and fit-check prototypes.
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Good PLA use cases
- A cosmetic cover that is not load-bearing.
- A faceplate with broad walls and no thin snap tabs.
- A prototype used to verify screw locations, clearances and switch travel.
- A cool-room accessory that will not be left in a hot vehicle or direct sun.
PLA pitfalls
PLA can be brittle under shock. Thin hooks, spring fingers and screw bosses that are repeatedly tightened deserve special attention. If a feature must flex, redesign it with a generous radius and a suitable orientation, or move that function to TPU. If a part will see warmth, select PETG or a higher-temperature material instead of assuming the color or brand changes PLA’s basic behavior.
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Do shiny or silk PLA filaments work for guitar accessories?
Use shiny PLA cautiously for stressed functional parts. In its February 4, 2022 guitar-accessories article, Prusa Research reported that a shiny Silk PLA wall mount failed along a layer line and explained that “the additives which make filament shiny also decrease the layer adhesion.” Other tested filaments did not show that particular problem.
That observation does not mean every silk spool will fail, but it is a strong reason to reserve decorative silk material for low-load covers and ornaments. For a wall mount, bracket or strum mechanism, use a conventional PLA or PETG profile and validate the layer direction with a test print.
Do you need ABS, ASA, nylon or polycarbonate?
Usually not. PETG is enough for most indoor guitar-controller accessories. Move to ABS or ASA when sustained heat or outdoor ultraviolet exposure is genuinely expected; consider nylon or polycarbonate only when the design and printer justify their higher process demands.
What the upgrade requires
- Printer capability: Confirm that the hot end, heated bed and enclosure meet the material manufacturer’s requirements.
- Environment: ABS and similar materials can require ventilation and a controlled enclosure to manage warping and fumes.
- Moisture control: Nylon and other moisture-sensitive filaments may need drying and sealed storage for consistent results.
- Profile tuning: Use a profile made for the exact material and printer; do not transfer PLA settings unchanged.
For a normal indoor controller mount, these costs and complications rarely provide a useful benefit over PETG. Choose them because the environment demands it, not because a more advanced polymer automatically makes a better accessory.
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How should you choose filament by accessory role?
Start with what the part must do, then check heat, impact, flexibility and appearance. This decision sequence avoids selecting a material by habit.
- Classify the load. If the part carries force or transfers motion, treat it as structural and begin with PETG. If it only covers electronics, PLA may be sufficient.
- Identify required movement. A grip, sleeve, bumper or grommet needs compliance, so evaluate TPU. A switch actuator or strum bar generally needs controlled rigidity.
- Check the environment. For a cool indoor setup, PLA and PETG are practical. For sustained heat or outdoor exposure, evaluate ASA, ABS, nylon or polycarbonate.
- Check the detail. Fine FDM geometry may be unsuitable for a tiny switch plunger; use resin when the controller design specifically calls for it.
- Check the printer. Confirm nozzle, bed, enclosure, ventilation and drying requirements before buying a demanding filament.
- Prototype the interface. Print a small test of holes, snap tabs, pivots and mating surfaces. Adjust dimensions before printing the complete accessory.
How do you print a reliable PETG accessory?
Use the printer manufacturer’s PETG profile as the starting point, then tune the features that affect fit and strength. The following workflow is more reliable than changing many settings at once.
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- Prepare the design. Add generous fillets to internal corners, avoid paper-thin tabs, and provide enough wall thickness and perimeters for the expected load. Keep screw bosses supported and leave clearance for moving parts.
- Orient the part for its real load. Layer lines are potential split planes. Orient a bracket so its main pulling or bending force does not try to peel layers apart. For a strum bar, prioritize the pivot and switch-contact loads over the prettiest top surface.
- Use the correct material profile. Start with the spool maker’s PETG profile for your printer and nozzle. Do not copy PLA temperatures, cooling or retraction values without testing.
- Print a fit coupon. Include one hole, tab, snap feature or section of the mating surface. This short print reveals dimensional error, stringing and adhesion problems before a full job.
- Inspect the layers. Look for gaps, lifting corners, weak seams and excessive strings. Correct one variable at a time—retraction, cooling, first-layer adhesion or speed—then repeat the coupon.
- Deburr and assemble gently. Remove strings and elephant-foot distortion without forcing snap parts. PETG can grip mating surfaces tightly; a controlled test fit is safer than hammering a nearly correct part into place.
- Exercise the mechanism. Cycle a strum bar or switch repeatedly by hand. Confirm full travel, return force and clearance before installing the electronics permanently.
For TPU, use the equivalent workflow with a slower profile and a larger tolerance allowance. For PLA, pay particular attention to shock-prone tabs and to heat where the finished controller will be stored.
How do orientation and geometry affect strength?
FDM parts are anisotropic: they are not equally strong in every direction. A material choice cannot rescue a design that loads a layer seam like a zipper. Put the strongest continuous perimeters along the force path, use multiple perimeters for screw bosses and pivots, and avoid concentrating force at a sharp corner.
Strum bars
Keep the pivot region thick and supported. Ensure the bar’s working face is backed by enough material that repeated taps do not flex a thin skin. If the design uses a snap-on cap, orient the cap so its retaining fingers are not printed as fragile, unsupported bridges.
Mounting blocks and brackets
Place the broad mounting face against the build plate when that improves adhesion, but do not sacrifice the orientation of a cantilevered arm merely for surface finish. Add fillets where an arm meets its base and verify that screw holes do not split a thin wall.
Snap fits
Snap features need both elastic travel and a safe layer direction. A rigid PLA snap may fracture if it is too thin; PETG can provide more flex, while TPU may be too compliant to retain the part. Prototype the latch separately and test repeated insertions.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What problems are common with PETG, PLA and TPU?
Most failures fall into a few recognizable categories. Diagnose the symptom before changing the material.
| Symptom | Likely cause | First correction |
|---|---|---|
| Strings between features | Retraction or travel settings are not tuned for PETG | Use the printer’s PETG profile, then adjust retraction and travel while checking a small test |
| Part lifts from the bed | First-layer adhesion, bed condition or footprint is inadequate | Clean and level the bed, increase the supported footprint, and verify the material profile |
| Snap tab cracks | PLA brittleness, thin geometry or unfavorable layer direction | Increase the radius and thickness, reorient the tab, or switch the structural version to PETG |
| Mount slowly softens | PLA is exposed to more heat than it can tolerate | Move to PETG or a higher-temperature material appropriate for the printer |
| Grip is too loose or too tight | TPU deformation and elastic recovery were not included in the design | Print a tolerance coupon and adjust the sleeve or bore dimensions |
| Layers separate along a wall | Weak interlayer bonding, poor profile or a decorative additive | Use the manufacturer’s profile, improve orientation and avoid silk filament for highly stressed parts |
| Plunger does not work | FDM resolution, friction or an incorrect material specification | Follow the controller design’s resin/FDM requirement and verify the mechanism before installation |
Do not respond to every failure by increasing infill. More infill adds weight and print time, but perimeter count, wall thickness, corner radii and orientation usually control the failure mode more directly.
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Are tiny fret buttons or switch plungers different?
Yes. Byte Arts’ StrumFix documentation specifies tiny switch keycaps or plungers as resin parts rather than ordinary FDM filament. Small, high-resolution features can bind, lose their intended travel or become too rough when printed with a typical FDM nozzle. If the controller design calls for resin, treat that as a functional requirement, not an optional finish choice.
Keep the material distinction clear: PETG or PLA can handle the larger structural adapter around the switch, while the tiny moving interface may need a separately manufactured resin component. Test the complete switch stack before final assembly.
How can you validate a finished accessory before using it?
A short validation routine catches most expensive mistakes.
- Dimensional check: Confirm screw spacing, hole diameter, shell clearance and the position of every switch contact.
- Manual load check: Apply the force a user will apply, gradually and by hand. Look for whitening, cracking, layer separation or permanent deformation.
- Movement check: Cycle strum bars, buttons and grips through their full travel without electronics powered.
- Heat check: Consider where the controller will be stored. A part that works in a cool room may not remain stable in a hot car.
- Repeatability check: If the accessory is a replacement or modification, print and fit a second copy. Consistent results indicate that tolerances and process control are adequate.
Document the filament type, profile and orientation that passed. That record makes future replacements easier and prevents accidentally repeating a failed combination.
What is the practical material decision?
Choose PETG 1.75 mm filament for the first serious version of a rigid guitar-controller accessory. Use PLA 1.75 mm filament to iterate quickly or to make a cool, cosmetic part with crisp detail. Choose TPU 95A or another suitable Flex grade only where the design intentionally bends or cushions. Escalate to ABS, ASA, nylon or polycarbonate for a demonstrated heat or outdoor requirement, and use resin for tiny plungers when the design specifies it.
The best result comes from pairing that material choice with sound geometry: adequate walls and perimeters, load-aware orientation, a test fit and a controlled assembly check. Those steps often determine whether the accessory survives more than the label on the spool.
Frequently Asked Questions
Can I combine PLA, PETG and TPU in one guitar-controller project?
Yes, if each material has a separate job. A rigid PETG mount can hold a PLA cosmetic cover and a TPU sleeve, but mating dimensions must account for each material’s stiffness, shrink behavior and surface friction; prototype the interfaces before printing the final set.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesWhy did my silk PLA wall mount split even though ordinary PLA prints did not?
Prusa Research reported a Silk PLA wall mount failing along a layer line and attributed the risk to additives that make the filament shiny and reduce layer adhesion. Reserve decorative silk material for lightly loaded parts, or validate a conventional PLA or PETG version for structural use.
Can a print service make these parts if I do not own a 3D printer?
A customer-directed print service can be practical for one-off brackets or replacement covers. Confirm that the service offers the required material, can meet the part’s tolerances, permits your controller design under its license, and serves your location before submitting files.
How do I know whether a controller part needs an enclosure-capable printer?
If the part is an ordinary indoor mount, bracket or strum bar, PETG normally avoids the enclosure demands associated with ABS, ASA, nylon and polycarbonate. An enclosure becomes relevant when you deliberately choose one of those materials for sustained heat, outdoor exposure or a specialized mechanical requirement.
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