My son and I just finished setting up a standard sized MPCNC. What an incredible project, we’ve had a lot of fun.
I have not been able to figure out how to make repetier host, or the RAMBO 1.4 to recognize the current location as home. I know I can manually move the router to where I want for x/y before powering up, but moving Z manually is difficult. If I use the controls in repetier host to manually lower the Z to the top of the workpiece, it sees that as negative and moves away when the print starts. I’ve tried sending G92 X0 Y0 Z0 E0 after positioning to no effect. The only thing I’ve found that works is to use repetier host to move down to the Z I want, then disconnect, power off the RAMBO, and power back up again.
This is pretty simple, I must be missing something basic.
Oh yes, and does anyone know how to change the default handle used in the forum?
Sorry for bumping an old topic but I’m having a similar issue and felt this was a good place to post a follow-up question. Up to now, I’ve been using the power kill method to re-home for tool changes and such and am also hoping to “improve” my methods a little bit.
Setting up the gcode script in repetier host as mentioned above seems like a good solution. I’m also wondering if anyone has suggestions on how to setup the print bed or any additional scripts that will allow free manual control within repetier host without the software trying to protect me from an overzealous move.
For a multi tool job, I’d like to be able to:
Turn my electronics on when I start working.
Use the manual control features in repetier host to move to my desired home position.
Set home using the G92 script.
Make the cuts with tool #1.
Move the spindle to my desired position to execute the tool change with manual controls in repetier.
Move the spindle back to my previously set home position through use of script in repetier?.
Make the cuts with tool #2.
Step 5 is where the issues start. Repetier host does not want to allow me to move the spindle forward and left of my previously set home position (which is where I typically get the best access to make the tool change.) This means that I have to kill power, move by hand, rehome by hand, and restart power.
I know I can add G92 X0 Y0 Z0 as an available script to solve step #3.
The following is where I get nervous and want to be sure I’m not sending my router haywire and jumping for the kill switch on my power supply:
Should I set my print bed to be a little larger than actual size and then just set my xmin and ymins as negative numbers? Im guessing this should allow a full range of moment across both axis at all times?
And similarly if I set the height as 2x of my actual work area height and Object Z top position in repetier as the midpoint of that number it seems like it would fix manual control in that direction?
Is there an easier way to just remove these movement “safeties” from repetier host? I haven’t been able to locate anything within the options menus.
