Newbie here

[tante]

Hi!
I am wondering how to prevent drilling the table, how can program know lenght of tool? Is there some sensor that check lenght of tool after every tool change?
Thanks! And sorry for bad english...

[Lionclaw]

On my wood mill I use a piece of MDF between the table and my stock. That way it doesn't matter if the sacrificial board gets cut up.

You also need to zero your Z-axis to the top of your stock, if that's the way you have your rig setup. So for my rig, everytime i change a bit or prepare to cut new parts i lower the tip of the bit to the top of the stock and zero the Z-axis.