LowRider v3 CNC with Jackpot controller - Workflow Explained - part 2

LowRider v3 CNC with Jackpot controller - Workflow Explained - part 2
Note: For part 1 of this short, 2-part series, click here:
• LowRider v3 CNC with J...
For more on use of the Jackpot controller with a LowRider v3 CNC, watch these other short videos:
• LowRider v3 CNC - Tram...
• LowRider v3 CNC with J...
• LowRider v3 CNC - Squa...
Documentation for the Jackpot is available here:
docs.v1e.com/e...
...and if you search that page for instances of the word "probe" you will see several mentions. Among them is the fact that a probe routine is present in the "Lowrider Starting Gcode" - which by the way, if you have probing scripted in that way, the gcode outputted by whichever CAM software you use (ESTLcam etc) will account for probing as part of each job. The "Lowrider Starting Gcode" is below, and it can be used for creating your own Probe Macro button on the Jackpot. Below, I have added "remarks" (commented out so they don't get acted on) to explain what the result of each gcode command would be:
G21 ; (assume part programs are Metric, as opposed to Imperial, which would have been G20.)
G90 ; (absolute positioning, as opposed to incremental, which would have been G91.)
G94 ; (interpret feed commands as inches/min or mm/min for linear moves.)
G92 X0 Y0 ; (set current position to values specified - and there are other code options for this.)
M0 (MSG Attach probe) ; (issue a message to operator to attach probe.)
G38.2 Z-80 F200 P0.5 ; (probe down to get thickness, allowing 80mm travel, speed 200, plate thickness 0.5 mm.)
G1 Z10 F900 ; (move upward in Z axis by 10mm at a speed of 900)
M0 (MSG Remove probe) ; (issue a message to operator to remove probe.)
M62 P1 (If used start spindle pin27 )
A huge "shout out" and thank-you to Ryan Zeller @vicious1 over at V1 Engineering Inc, and all the helpful crew at the V1E forum! Also to Bart Dring & Mitch Bradley & BrianD & Michael Melancon of the Fluid NC dev team!

[@chrishenderson6500]

thanks for these videos Doug, I just got a jackpot and I will hopefully be using all these tips SOOOOOOON!

[@design8studio]

Glad it's helpful!

[@zemlejna1]

Hi Doug, tricky question for you. Does one attach the power supply directly somewhere on the jackpot case / lowrider beam? Or is it better to have it on the table somewhere and bring just the cable to the jackpot? Thank you.

[@design8studio]

Most LowRider makers - based on my observation through the V1E forum -do seem to embed their AC-to-DC power supply inside the beam of their LowRider. I also did it that way.

[@zemlejna1]

@@design8studio That helps. Thank you

[@jasne2992]

I want to order some parts for my first lowrider. Total noob, but have to choose a controller, jackpot or skr pro. My plan is to mount a 5w laser attachment to the router. Can you give me a hint which controller i should order? (guess it´s the jackpot, but just to be shure ..) THANKS

[@design8studio]

I would say Jackpot, definitely. It's firmware (FluidNC) is GRBL compatible, and that means it does better (and faster) at raster moves for laser. It's also got other advantages over the SKR for CNC work. For a little more details on it, check out this reply I made to a similar question on the V1E forum: forum.v1e.com/t/garage-shop-mobile-lowrider-v3/40549/41

[@paulthomann7911]

Hey Doug, great stuff! Thanks so much for the videos. Do you by any chance have a video of wiring up the jackpot controller?

[@design8studio]

I don't think so, but the Docs do a pretty good job on explaining what gets wired in where. I did document some of my efforts to switch to the Jackpot (see link). One of my videos (about a printed "make a block") does show where on the board the end-stop switches get wired in, and where the touch plate gets wired in. forum.v1e.com/t/getting-started-with-jackpot-on-lr3/40849

[@paulthomann7911]

Thanks so much Doug. That thread really helped to see what I am up against. @@design8studio

[@design8studio]

@@paulthomann7911 bear in mind that I saddled myself with an additional task of swapping the X & Y axes because that’s how I have my LowRider set up due to my room situation. So part of that you may be able to ignore.

[@paulthomann7911]

@@design8studio Well thanks. I understand all that. Not my first rodeo. I have a Lowrider 2 and a Lowrider 3. My Rambo board is starting to act rather flaky so I decided to replace it. When I went to V1 I saw they had discontinued offering it. Since I didn't want to spring for another SKR Pro I decided to give the Jackpot a try. Seems like using a GRBL post processor vs a Marlin is not really a big deal so I started looking into what I was up against and of course banged into your journey. I haven't received it yet but I am printing out your box as we speak. Thanks for all you do. I have looked at several of your other projects and they are all very well documented.

[@bunkie2100]

Hi Doug, can you clarify something for me? Looking at the gcode for the probing script, I don't how the actual z offset obtained from probe contact is retained. I am an absolute beginner who knows next to nothing about gcode, but I am an experienced coder in many other languages and what I would expect is for the script to set a global value that would then be used by any subsequent code or job. I've looked at the documentation for G32 and it says nothing about this. What am I missing here?

[@design8studio]

The FluidNC wiki has a nice helpful section on probing. Notice the subsections on "Using the probe" and "Setting Work Zero" and especially "Optional P parameter" which is what I use in my script, and it not only sets the zero but does so to accommodate for the touch plate's thickness. wiki.fluidnc.com/en/config/probe

[@design8studio]

Regarding the concept of a global var or param, there is a whole array of coordinate values that are stored in any board running either GRBL or FluidNC, regarding not only the "machine" origin for each axis, but also for multiple "workspace" origins for each axis. The Zeroing process sets one of these, depending on how you program it. Please watch this super helpful video that explains the various workspaces: kzbin.info/www/bejne/nHjXk56Mf6eLr6c

[@bunkie2100]

@@design8studio Thanks! That was really helpful.