Originally Posted by
jkarisny
If the gantry is "locked" in on all sides by bearings, can it still rack?
Yes. It's a relative term. Some rack less easily than others but it depends on what it is made of, and how it is designed. It depends on where and how much force is applied. The tighter it is "locked in" the less travel of one end it takes to make the gantry bind. Racking is such an issue with DIY CNC machines that it is why you see a lot of the newer builds using two motors driving ends of the gantry. I think it was less common 4 to 5 years ago than it is now. You still have to true the gantry fairly often or at least check it.
CarveOne
CarveOne
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