Could you please post the compete schematics including the probe. It is probably just a lack of my education. From what I can see you connected +5v from usb to the ground of the inputs... which i thought was connected to -5v. What am i missing?
Thanks for the script, everything works fine, but when the drill touches the probe the Z-Axis moves down (into the probe) before it moves back up... i fortunately tried it all holding the probe in my hand ;)
Mach3 Probe Script Download Pdf
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MACH3 has a rich scripting system, which allows you to realize a lot of additional functions to your machine. Scripts are written in language based on VBA (Visual Basic for Application) and implements a lot of the functions. Even if the MACH3 script editor has sometimes little bit strange behavior, it is the powerful tool for programming the extra features for your machine.
This article does not explain how to program or modify the scripts. If you are interested of that, let me know, and I can touch this topic in some of the next articles. In this article is described way, how to use the prepared scripts, dedicated to probing in MACH3.
With this change, you get an experience that is closer to running carbide motion. It pauses the gcode, prompts you to enter a tool and then probes before finally asking you to resume. If you are using a router, you do still need to remember to turn the router on and set the speed.
Your understanding of how it is turned into a conductive probe is also correct. An important note is that the probe tip is actually isolated from the spindle. The tip screws into a plastic threaded piece.
In that case, it should be relatively easy to solder a custom cable that provides an connector so you could remove a small alligator clip jumper to enable probe mode when you wanted to, and when removed it would just act in its normal probe mode.
all you should need to connect both of these at the same time is 1 mini XLR female connector, and 2 mini XLR male connectors, and then wire the female to both of the males, essentially making a Y splitter, as long as the Bitzero v2 is in a holster so it doesnt close the circuit you could leave the cable for the probe coiled and ready to go when needed.
that is true, i guess you wouldnt really ever need to bypass it since like you mentioned non-conductive stock will just trigger the touch function, if anything just having a collar that could clamp onto the probe tip, with a hole & set screw to clamp on the data wire would just make the connections a little neater/robust.
Datron retrofit. Early days for this Mach3 conversion. We have the bed and motors but no electronics from the old machine apart from the spindle driver. Using TB6600HQ drivers on existing steppers for now. I need to understand how the Z probe works so I can interface it to Mach3 somehow. Any help much appreciated, CNC is new to me, electronics / software less of a problem. Kind regards, David
.@Peter_Spiess I made some progress this afternoon and traced out the connections and connected 12 VDC and serial comms. The unit responded to Ascii 0 and 1 to deploy and retract the pprobe. Ascii = returns two bytes the value of which is the probe distance from full extended. the range appears to be 0x6041 to 0x7f5f over the approx 8mm. The little red switch when operated manually deploys the probe.
missing/deleted image from Google+
The probe is now deployed by writing to a modbus register and the measurement reading this is then relayed back to the Mach3 through another modbus register. When deployed the Z probe offset is continuously measured onve every 1/4 second.
The software is a modified version of the Arduino modbus interface here: =21105.0 together with the software serial library which is used for the probe communication. Both melded together by myself for this purpose.
You will need to configure the probe as an active low input on an available open input. The example below shows pin 15 being used, but if you are already using pin 15 for something else (such as a limit switch or estop), you will need to use another available input.
If you have a CRP800 Plug and Play CNC Control Systems, the probe input should already be set up on Port# 2, Pin# 9 (tied to the "AUX 1" input on your controller), or Pin#6 (in older revisions of our configuration files, tied to the "Z" input on your controller).
If you have an Ethernet Smoothstepper (pre-installed in most plug and play packages), go to the diagnostics page under Plugin Control->ESS Data Monitoring. From this menu, you should be able to see an input signal toggle (check mark turn on and off) when you touch the magnet (or clip on older models) to the brass puck of the touch plate. If you do not see the same signal toggling that you assigned to the probe input, you should go back and re-assign the signal. If you do not see a signal toggling at all, contact us before proceeding further.
If your CNC control computer is not connected to the internet, you can also download this script to transfer it manually. Once the script is on your control PC, simply open with Notepad and then copy/paste into the editor.
When the probe input becomes active the current positions of all axes will be captured and the motion will decelerate to a stop in a controlled manner. Mach3 variables 2000-2005 will be filled with the captured position.
Note: If the Probe input is already active at the beginning of the probe, or the motion completes without the Probe input ever becoming active, an error will be displayed and G Code execution wi/l stop.
another update to the VIM script, this one adds another parameter (isRampZ) as a boolean to either ramp Z down or to plunge Z down during the PH to ITH transition. In either case, Z also moves in a timed unit mode to consume a portion of the Pierce Delay. Thanks to @TomWS for sharing the idea to consume the Pierce Delay during Z transition. This type of PH to ITH transition I have found has the side effect of making a gouge or narrow pierce hole rather than the usual large pierce hole otherwise. This is ideal when doing the Z plunge, which I use for starting open shapes, cutting tabs, or otherwise not desiring a leadin; that is, the pierce hole is in the saved part, not the waste part.
plasmapp3.vim.txt (7.5 KB) be457b7860
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