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What defines the 'straightness' of linear rods and how to measure it?

A common metric for straightness of shafts in industrial equipment is Total Indicated Runout (TIR). The shaft is placed in V-blocks or ball bearing rollers at its bearing journals. Runout is checked ...
allardjd's user avatar
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Ender 3 S1 Pro – Z offset keeps changing

Try tightening the eccentric nuts on the Y carriage, they were lose on mine from factory which was causing it to rock side-to-side so made bed leveling impossible.
Geordie's user avatar
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