[Lab] how to change endmills and not loose Z zero?

[Darcy Whyte]

Returning to zero will bring the spindle too low to withdraw the endmill
from the chuck.

But even if I could, the length of the endmill sticking out the chuck will
not be the same. I need to get it to be the same or move it to zero somehow
and then rezero the z axis in the software.








On Wed, Apr 13, 2011 at 3:33 PM, Tom Burns <tom.i.burns at gmail.com> wrote:

> Having no practical experience with a CNC yet this is only a guess, but
> could you return to zero before switching endmills?  Or would you end up
> still having to estimate Z position.
>
> On Wed, Apr 13, 2011 at 3:30 PM, Darcy Whyte <darcy at siteware.com> wrote:
>
>> I want to eventually do cnc cutting with multiple endmills.
>>
>> Problem is I wont know where zero is for the work in progress. It's easy
>> to estimate zero at the start and it works okay for cutting. But to continue
>> work, an estimate wont do. It has to match.
>>
>> Any ideas?
>>
>>
>> --
>> Darcy Whyte
>> *Darcy at Siteware.com*
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