Can anyone provide guidance on how to control the flatness of a machined aluminum cover when flatness must apply when the cover is bolted to the enclosure? I'm finding that controlling the flatness in the free state is insufficient because of the bulging effects of the bolts. There are separate EMI (braided mesh) and environmental (o-ring) seals. The bolts must be tightened until they close the gap between enclosure and cover. Compression stops might work but I dunno.
Tunalover
Tunalover