In an Iraqi summer, a car parked in the sun turns into a real oven, and any part printed in PLA filament that you leave on the dashboard comes back bent and sagging. The problem is not the printer and not the design, it is the material itself: PLA is excellent for models, decor and parts that live indoors, but it starts to soften at relatively low temperatures, and those temperatures are easy to reach inside a closed cabin in July or near any heat source.
This is where ABS comes in. It is the same material used in the bodies of many home appliances, in car interior parts, and in Lego bricks. Its glass transition temperature, the point at which the material begins to soften and lose its stiffness, is around 105 degrees Celsius, a decisive difference compared to PLA. Beyond heat resistance, ABS absorbs impact and bending instead of snapping in a brittle way, and it accepts post processing: you can drill it, sand it, file it, and even weld two pieces together with acetone. The trade off? ABS is harder to print than PLA, and this whole article is about making it easier.
Where ABS is worth it, and where it is not
Before you buy a spool, check whether your job actually needs ABS. The material earns its place in these cases:
- Parts that live inside a car: holders, mounts, covers, and anything near air vents.
- Enclosures and housings for electronics that generate heat, such as power supplies and control panels.
- Mechanical parts under pulling and knocking loads: gears, hinges, tool holders, and parts fastened with screws.
- Any part you plan to sand, paint, or chemically smooth for a factory-like finish.
On the other hand, if the part is decorative, a first prototype, or a figurine that stays indoors, PLA is easier, cleaner and sharper in detail. Do not complicate your life for no reason.
The available ABS colours let you choose by use case: blue and red for parts you want to stand out, and silver for housings and covers you want to look metallic without any paint.
Settings: the numbers that matter
Most ABS failures come from settings copied straight from a PLA profile. Here is the correct starting point:
- Nozzle temperature: in the 240 to 280 degrees Celsius range depending on brand and colour; start in the middle and go up if layer bonding looks weak.
- Bed temperature: 90 to 100 degrees Celsius. Anything lower means lifted corners.
- Part cooling fan: very low or off; its upper limit is around 80 percent and you usually need far less. Fast cooling is the number one enemy of ABS.
- Chamber temperature: 35 to 45 degrees Celsius helps reduce the internal stress caused by material shrinkage.
Since the first print is rarely dialled in, keep an economical spool dedicated to tests and calibration before you burn an expensive one on a large part. Grey is ideal for calibration because it shows surface defects clearly, unlike black.
The enclosure: the rule you cannot break
ABS shrinks as it cools. If the bottom layer cools quickly while the upper layers are still hot, stresses build up and pull the corners of the part upward (warping), or open cracks between layers on tall prints. The fix is not more heat, the fix is stable heat: an enclosure that blocks cold air currents, which matters a lot here where an air conditioner or fan often blows straight at the printer.
At the same time, ABS releases odours and fumes while printing, so the room itself must be well ventilated even if the printer is enclosed. The simple formula: printer enclosed, room ventilated, and do not sleep in the same room while it runs.
If your work involves large parts such as covers, boxes and frames, a wide build area gives you design freedom instead of slicing the part into pieces and gluing them. Just remember: with an open frame and large ABS parts, a hood or enclosure around it becomes a necessity, not a luxury.
Bed adhesion: half the battle
With a bed running between 90 and 100 degrees, the print surface becomes a decisive factor. Dual sided PEI plates give you two options in one plate: a smooth side for a glossy, flat first layer, and a textured side for stronger grip and a bottom surface that hides defects. Clean the plate with soap and water or with alcohol before every ABS print, because finger grease alone is enough to lift a corner.
If your machine is in the small A1 mini class, its dedicated plate works on the same logic. Just note one important point: open frame machines of that size suit PLA and PETG better, so keep them for design trials and prototypes, and print the final ABS version on an enclosed machine.
Moisture: the silent enemy
ABS absorbs moisture from the air, and humidity here is high in summer, especially in provinces near the river. Wet filament gives you bubbles, popping sounds at the nozzle, a rough surface and weak layer bonding. The recommended drying: a drying oven at 80 degrees Celsius for 8 hours, or the printer heated bed at 90 to 100 degrees for a longer stretch.
Easier than repeated drying is not letting the spool absorb moisture in the first place: store it in a sealed box with silica gel packs. Enclosed spool systems serve the same purpose while printing, and add automatic colour changes so you do not stand there for every swap.
Common mistakes
- Copying a PLA profile and only changing the temperature: the fan stays at 100 percent and layers separate. Change the cooling settings first.
- Opening the printer door mid print just to look: one cold draft is enough to lift the corners and ruin hours of work.
- Sharp corners in the design: a hard right angle concentrates stress at the base. A small fillet at the edges noticeably reduces cracks.
- Skipping the brim: on tall parts or parts with a narrow base, adding a brim saves you a full reprint.
- Printing in a closed room with no ventilation: that is a health mistake, not a technical one. Always air the room.
- Using ABS where it is not needed: if the part stays in the shade indoors, PLA is faster, easier and more precise.
Practical takeaway
ABS is not a difficult material, it is a material sensitive to heat and airflow. Get four things right, a stable enclosure, a bed between 90 and 100 degrees, low cooling, and dry filament, and you will get parts that survive a hot car and daily abuse. Start with a small calibration part, save the settings that worked into a profile named after the material, then move to large parts with confidence.
All the materials and accessories mentioned are available with delivery to every province in Iraq and cash on delivery, so you can experiment and receive your order without hassle.
