Messages

1

Mach4 General Discussion / Re: Verify button does not work in wxMach screen

« on: February 19, 2019, 07:03:11 AM »

Hi,

When I read in "Mach4 CNC Controller Operations Guide" how the "Verify" function works, I understand that it is already implemented and I only want to copy it in my screen. I want to avoid coding it if it is already done...

In fact I really don't know how to implement such a "verify" function. 

I think it should be something like G31 - Probe function, but instead of probe input it should be one of the X, Y and Z home microswitches... I need to (slowly) move on each axis in the home direction and stop motion when the microswitch triggers, save coordinates and then compare them with the home position X, Y and Z. But how can I do that?
Thanks,

Serban

2

Mach4 General Discussion / Re: Verify button does not work in wxMach screen

« on: February 19, 2019, 03:19:00 AM »

Hi Craig,

Usually, I use a copy of wx4.set screen (named wx4_PK.set). I only loaded the wxMach.set screen in order to see how the Verify function/button works. As I wrote, I need it and I want to copy it in my wx4_PK.set screen.

Serban

3

Mach4 General Discussion / Verify button does not work in wxMach screen

« on: February 18, 2019, 02:40:51 PM »

Hello,

I have Mach4 v4.2.0.3804.
In wxMach screen, in MDI tab there is a "Verify" button.
In the Mach4 Operation Manual.pdf it writes about this button:
"Verify: Sends the machine to the home position, using the homing sequence, however the home position is not set. The end position of the sequence is compared to the previously found home position when the machine was referenced. This is used to verify that the switches have not moved or steps been lost in running the machine."

When I press the Verify button it does nothing. I've entered Operation-->Edit Screen and the "Verify" button seems to have no function associated with it!?

How can I activate/implement this "Verify" function?

This is why I need it:
I have a CNC router with Home switches and no encoder.
I've noticed that it does no loose steps during milling, but sometimes (after several machine restarts and referencing) there are differences between the old and new home positions (relative to a fixed position on the machine bed).
I need to mill a plastic sheet on both sides and I use two bolts on the machine bed to place the workpiece in a certain position and to flip it in the same position.
Sometimes there are differences between the two faces of the milled part, usually about 0.3 - 0.7 mm on Y or Z axis.
Before upgrading the software to Mach4 I used a software that had such a "Verify" function (named RehomingCheck) and when the error was low <2-3 steps, the two faces of the plastic sheet were well aligned. Sometimes the error on Y or Z axis was about 30 steps (0.15mm) and I could see an offset between the two sides of the milled workpiece (~2 x 0.15 = 0.3 mm).

Thanks.