User, 19 Oct 2026: one plate every 5 records; how do we make sure the
plates don't scratch the records.
- Plate every 5 (10 per 50-record stack, ~15 kg a stack).
- Scratch rules: groove-guard profile keeps grooves off the plate (QRP);
plate flat, larger than the record (306 to 310 mm), deburred; clear
anodised (cost estimate, CNY 16 to 28/m2 China reference); vertical
handling only; no grit (trimmer extraction, ionised blow-off and wipe
on return, covered carts and racks); numbered plates, monthly check;
station compares scratches on plate faces vs record faces.
- About 700 plates for a 24 h queue (25 sheets, THB 245k to 315k cut,
+ 35k to 105k anodising, estimates); 200 to 260 for 8 h.
- Plate trial adds bare vs anodised and the scratch comparison.
grabowski
69f8392a23
