Trying to make my first cut on the LR4

Software / Firmware EstlCAM
1

Did the full build and everything is ready to test my first cut. Followed every guide I could, put a bit in the router and some foam for my first cut. This is the recommended settings:

On the Lowrider V¾ you will typically home all axes before starting your job and drive the machine with the control panel to the starting position. This gcode would then run to reset the coordinates and probe the surface.

G21
G90
G94
G92 X0 Y0
M0 (MSG Attach probe)
G38.2 Z-110 F200 P0.5 (probe down set thickness )
G1 Z10 F900
M0 (MSG Remove probe)
M62 P1 (If used start spindle pin27 )

However, when I home everything and start it, probe down, all good and then machine drives up and starts trying to rip itself apart.

I looked up that line after the probe and from what I can tell it should only move up by 10 but it goes way past that and slams to the top.

Not sure what I should be looking to change

2

can you be more specific? :slight_smile:

Please try to change your probing line to:

G38.2 Z-110 F200
G92 Z0.5
3

I’ll give that a shot.

Yeah after the probe it shoots up into the z-stop and then does not stop until I unplug it. I know if you give it a command the stops don’t really work unless you home it. So that coupled with the right after the probe made me think it was something to do with the start area.

4

Z-110 is a problem from what i can see. If homing. It is + not negative. 0 is the top of your cut piece, so homing is at +110. If probing, the z number should be the thickness of your probe plate.

EDIT: this information is entirely incorrect.

5

What controller is this? If it’s FluidNC/Jackpot, a negative Z in the probe command is correct.

I’m wondering if you have the Z motors going in the right direction? If you do a negative Z jog, does it go up or down?

6

FluidNC/Jackpot

Negative goes down. All directions are correct. The probe command works and stops when it hits the probe, after that though the machine shoots up and does not want to stop going up. From the code it should only be moving up 10 I thought?

7

From my limited knowledge isn’t the P0.5 the probe thickness? The z-110 is the “go down until you hit probe” number.

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8

The G38.2 should probe down until it hits the touchplate, up to 110mm, at a feedrate of 200 mm/min. It will then zero the Z axis assuming a 0.5mm thick touchplate.
Since it has been zeroed, that G1 move should only move up 10mm.

9

Okay I figured it out. Got it working!

I think I switched the ESTLCAM settings off of grbl so it was using the right code on the wrong stuff.

2 Likes
10

You are correct. My mistake.