Topics

1

General Mach Discussion / Milling is flipped

« on: November 06, 2010, 11:29:35 AM »

Hopefully I am not posting tons of messages,  The site keeps giving me errors but I do not see my post.

Anyway...  My Y axis is flipped compared to what is on-screen.  Please see the below screenshots with what I am talking about and my settings.  I would like to keep the settings so when I jog, the table moves left when I press left, up when I press up, etc. 
The bottom PCB that you see is the correct one and the top is the two that I just milled.  I did the correct one with EMC2 and it does work correctly so its just a matter of my mach3 settings somehow.

 

2

General Mach Discussion / Starting positioning questions

« on: August 22, 2010, 03:17:09 PM »

Hello, This is my first post and first time CNC-ing so please be gentle.  I have built my own cnc table and am using mach3 to run it.  I have X Y and Z axis moving correctly.  My question is...  i have g-code for a circuit board and I have a PCB material 1/32 in thick.  I try to position my milling head(dremel tip) to the bottom left corner and touching the material however once it starts moving the Z axis picks up, and X and Y move to position, the Z axis drops down slightly and starts milling above the material.  I read another post where the G-code thinks 0 is somewhere different than the top of the material.  My Z-axis is 0 at the top and -3(ish) at the bottom where it hits the base.  I am not sure how to go about changing the z-code or my configuration to have it mill slightly into the PCB to skim off the top copper layer.  Any advice would be appreciated, just remember I have come a long way to get where I am so the more detailed info you can give would be great.  Thanks!