Re: Measuring and predicting accuracy
hello ricc, white and old thread, but i'll give it a go
for now I found how to measure backlash and linear motion precision and repeat precision
such measurement should vary with axis position among entire travel; deviations should be lower with pretensioned screws, but they still exist
calibration procedure involves a medium value, between rapid and feed, thus there is not a fix4all-value
Both under no load. However I presume that when running on a workpiece the machine is much more heavily loaded and the aformentioned results are not extremely useful. If the linear guides bend because of forces on the spindle
look, for example an okuma machine is rigid in such a way, that when the overtorque is triggered in feed mode, still nothing bent inside the machine; at full rapid, it's non rigid articulations may break or slip, thus avoding costly damage
as for your chinese 6040z, i think you will find it's limit in time, by machining different stuff / kindly
Ladyhawke - My Delirium, https://www.youtube.com/watch?v=X_bFO1SNRZg