Night-shift scan handovers

Why handovers fail on plant floors

Most scan jobs at Midrand Technical Park do not finish in one tidy day shift. A LineGate XL recipe on an automotive fixture bay, or a handheld pass on a mining wear liner, often spans late afternoon into the night crew. The day team clocks out with a half-finished mesh, a few markers still on the part, and a verbal note that never makes it into the folder. By 06:00 the next crew is re-scanning surfaces that were already good, or worse, they move a datum sphere and quietly break the alignment the night before spent two hours locking.

We see the same pattern at plants from Rosslyn to Secunda. The scanner is fine. The fixture is fine. The shift sheet is empty or full of slang only one person understands. Handovers fail when quality notes live in a WhatsApp chat, when temperature is missing, and when nobody writes which face of the part still needs coverage. That is not a software problem. It is a paper and photo problem, and it is cheap to fix if you treat the close-out as part of the scan, not as optional homework.

What to write on the shift sheet

Keep the sheet short enough that tired people will actually fill it. We ask crews for five blocks: job ID and part serial, instrument and recipe name, datums and marker IDs still live on the part, mesh status (complete faces vs open holes), and the next action in one sentence. Add bay temperature and who signed the last CalBlock check. If the night crew changed clamp pressure or rotated a soft jaw, write that too. Do not invent a novel. One page, block letters, photo of the sheet in the job folder before you leave.

Name files so the morning person can find them without calling you. We use plant-code, serial, shift, and a short status tag, for example ROS-LN4-4471-NIGHT-PARTIAL. Put the mesh and the colour map in the same folder as the sheet photo. If you use BlueMesh Studio exports, leave the project file openable, not a pile of unnamed STL dumps. The next shift should open one folder and know exactly where you stopped.

Mesh QC checks before clock-out

Before you hang up the scanner, run a quiet QC pass that the morning crew can trust. Check for seperate islands that should have been one shell. Look at thin walls and deep pockets where night lighting fools the laser. Confirm target coverage on the faces that still need work, and note any spray residue that will look like geometry at 07:00. If a colour map already shows a hot band on a critical bore, flag it in the sheet so nobody "cleans" the mesh and deletes the evidence.

We also ask night crews to freeze a witness capture of the fixture with spheres in frame. That photo is cheap insurance when someone bumps a rail overnight. Pair it with the verification habit in verification rituals that stick. Five minutes of mesh hygiene beats a disputed morning meeting where both shifts swear the part moved by itself.

Datum and photo pack for the next crew

Hand over the coordinate story, not just the triangles. List which datum spheres are primary, which markers are temporary, and which faces were used to build the alignment. If you re-probed a hole after lunch, say so. Stick a printed sketch or a phone photo of the marker layout in the crate lid. Day crews arriving cold should not have to reverse-engineer your alignment from a half-labelled part.

Photo pack minimum: overall bay shot, close-up of clamps, close-up of each live sphere, and a screen grab of the last colour map with the scale visible. Store them next to the mesh. For toolroom jobs that move onto CAD, leave a note pointing to from mesh to machineable solid so the modeller knows which open regions are intentional. If the morning person will finish coverage on a Gate Tower Pro cell, say whether the recipe was paused mid-pass or closed clean.

Midrand and SA plant context

South African plants rarely pause for perfect metrology windows. Load shedding schedules, overtime rules, and contractor handovers all squeeze the night bay. At Midrand we train demo visitors on the same sheet we use on customer sites, because polite demos that ignore shift change do not survive a real Rosslyn night. Coastal plants add humidity and optics drift. Inland mines add dust and long walks between the part and the laptop. The sheet does not change much. The risks do, so write the local constraint in the margin: generator changeover at 22:00, crane booked for 05:30, hygiene lock until the wash is done.

If your crew rotates contractors, print the sheet template and leave blank copies in the fixture crate. Do not rely on a shared drive that only the day supervisor can unlock. We have watched good meshes go to waste because the night file sat on a locked laptop. A USB labelled with the job ID in the crate beats a clever cloud folder nobody can open at 02:00.

Where this links on the site

Night handovers sit between instruments and applications. If you are specifying a fixed cell, read instruments for LineGate and Gate Tower options, then the matching applications leaf for automotive fixtures or mining wear. Colour map conventions for the morning toolroom are covered in colour maps that fabricators trust. Fixturing that survives a shift change is in fixturing before you press scan.

If you want a walkthrough of a handover pack we use on Midrand demos, email info@3dscanner.co.za and mention night-shift scan handovers. We answer during ordinary business hours. Put your plant, shift pattern, and whether you run handheld or a gate in the subject so we can reply with the right checklist, not a generic brochure. We are happy to review a redacted sheet photo and tell you what is missing before the next overtime run.

Keep exploring

Applications · Instruments · Email us. If your night bay keeps losing alignment between crews, say so early. We would rather tighten the sheet with you than watch a second visit get booked for work that was already done.

Questions on night-shift scan handovers? Write to info@3dscanner.co.za with your city, shift times, and two photos of your current close-out pack if you have them. We reply from Midrand Technical Park. If the brief is urgent, put the go-live date in the subject line so it does not sit under demo booking mail.