Page up and page down Keys

[Hunterland]

I have a problem ,probably more than one. when I first start my machine and go to raise the bit for changing it ,and I hit the page up button the bit goes down but after zeroing z and doing it again it works ok and have not had it do it again until I start it again after some time (next day ,next Week)has any one else had this happen? I'm using a PRS standard shop bot . any clues or advice will be appreciated. Thanks Don

[Adrian]

Probably best to ask on the ShopBot forum as it's not really a Vectric issue.

Doesn't the Z rise automatically to the correct height when changing bits? It does on my ShopBot but that might be something I changed in the routines a few years back and forgot about.