true up

Short definition from Wiktionary

Verb

1. 1
   To make something true, equal, or correct, as for example by turning and facing a part on a lathe.
2. 2
   To make a wheel level, balanced or even by adjusting the spokes; to true a wheel; ideally, to make it perfectly circular in relation to the hub with no left or right bulges nor 'flat spots'.

Noun

1. 1
   An adjustment to make something equal or correct.