Nest before you pierce

Why pierce order and nesting matter together

Any South African fab shop that has run a fibre laser for even a few weeks knows the pain of a badly planned nest. If your first thought is just to fill the sheet and start cutting, you eventually land up with more scrap, bent parts and sometimes even a scorched nozzle. It is not only about materials, it is about stability, heat management and fit-for-purpose edges.

When pierce points and cut sequence are left to chance, the machine can cut parts loose too soon or bunch up heat in one area. That means tip-ups, ugly edges or even a stuck pierce that wastes time and consumables. Planning the nest with the pierce order in mind helps your system avoid these headaches from the start.

Lessons from the field on settings and checks

What we have learned on the shop floor is that nesting software like SheetNest Pro works best when you set up clear rules before the first run. We group small parts away from the outer edges, space out heavy cuts, and use common-line cutting when it suits. Always check your lead-ins so that piercing happens on scrap or tabs, not on good part edges.

On the machine, keep an eye on cutting head optics and the protective window. A dirty cover slide will spoil your pierces, especially if you are running back-to-back sheets. The assist gas you choose can affect pierce quality: nitrogen for clean stainless edges, oxygen for mild steel, and clean dry air for thin gauge work. Never skip the extraction, metal fume builds fast with repeated pierces.

A real job where nesting saved the run

One Highveld customer was cutting 1.5 mm stainless signage blanks with a rush to get parts powder coated the same afternoon. The first attempt had no set nest, just imported DXFs and hit start. Within ten minutes, two parts had shifted, a burr jammed the nozzle and the edge quality went fuzzy.

We helped them regroup with SheetNest Pro: we spaced the parts, set the pierces to start at the corners, and sequenced the cuts to move heat away from finished parts. The next sheet ran through without a single hiccup, all blanks came off clean and straight, and the powder line got moving on time.

Practical steps for better nesting and pierce order

If you want reliable, clean parts with less scrap, a planned nest and smart pierce order are non-negotiable. Before every critical job, walk through these steps and you will see the difference on your finished products.

• Nest parts with enough spacing to prevent heat build-up and part shift
• Group similar thicknesses and materials for each sheet
• Set pierce points on tabs or scrap, not finished edges
• Sequence inner cuts before outer profiles to keep parts stable
• Check assist gas lines and pressure before every run
• Inspect and clean the protective window daily

When to ask us for help with your nest

If your cut parts are warping, shifting or the scrap pile grows faster than the crate of finished product, it is time to get help. We have helped teams from signage shops to mining outfits solve difficult nesting and pierce problems, both online and at our Sunnyrock HQ sample cell.

Send us a message through our contact form if you need a reviewed nest brief, want to set up SheetNest Pro for your workflow, or need troubleshooting on pierce quality. With the right plan, your team gets more good parts per sheet and cleaner, safer cuts every shift.