Hello Guest it is March 29, 2024, 01:24:55 AM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - Davek0974

2081
General Mach Discussion / Re: Z-Axis Dro - Odd behaviour?
« on: January 17, 2016, 06:54:05 AM »
Good point, I don't run a mill or router but have seen the diagrams of rolling around a corner producing a point, I guess it would be the same, thanks.

2082
General Mach Discussion / Re: Z-Axis Dro - Odd behaviour?
« on: January 17, 2016, 03:42:14 AM »
Yep, IMHO, the hard part is building a machine capable of doing CV at all speeds, if it even exists?

My latest build gets close (ish), I think to improve I should have gone with servo motors and closed loop motion control, would likely have to mortgage the house to pay for it all though :)

In reality, CV is impossible though surely? The machine MUST come to a stop to do a sharp 90deg corner??

2083
General Mach Discussion / Re: Z-Axis Dro - Odd behaviour?
« on: January 16, 2016, 04:56:59 PM »
If we ever meet, i'd buy you a pint, but bring your notebooks ;) ;)

I will be trying this out tomorrow, I was just always led to believe that the toolpath display actually had more relevance, it seems not.

Don't go anywhere, I may have several hundred more questions :)

And yes a plasma section would have been cool, it's not really the same as mills and lathes, needs a different touch.

2084
General Mach Discussion / Re: Z-Axis Dro - Odd behaviour?
« on: January 16, 2016, 02:35:21 PM »
Hi again ;)

My set-origin button was created by someone on this forum I think, many moons ago, i just asked for what i wanted and that was offered up :) It gets used a lot but was told it needed the regen in there, so there it stayed, it is a total PITA though as it can take some time to regen a big file.

I will play with this tomorrow and see how it plays without that feature and if needs be then storing the Z and replacing it is the way to go.

Sounds like you really could write a book there, ever thought of it :)

In theory, my Z DRO should never be off of 15.00mm between cuts, let's see if I can attain that goal.

This still does not explain the small offset related to the THC adjustments DRO but thats always a small amount - still very annoying though as the last line in the code is Z15.00 and it never gets there :(  Unless the tHC is off.

2085
General Mach Discussion / Re: Z-Axis Dro - Odd behaviour?
« on: January 16, 2016, 11:40:53 AM »
Comment out the last 4 lines of the button code  They are not needed. 

IF yo insist on using it then add in another line at teh end

DoOemButton(1010)



Hmm, will try that out tomorrow but I have found odd things happen if the tool path is not reflecting the actual setup - this needs the regen line adding back in.

No idea why this line is there anyway DoOEMButton(242) 'Copy X Y Z to G54 ??

2086
General Mach Discussion / Re: Z-Axis Dro - Odd behaviour?
« on: January 16, 2016, 11:11:57 AM »
I should have mentioned, this is a parallel port system with a CandCNC Mp3000-DTHC2 on it.

2087
General Mach Discussion / Re: Probably simple but...(G-Code help)
« on: January 16, 2016, 10:44:11 AM »
You can leave it that way IF you want OR you can change it back to use the initial move. Setup / portPins/Millsetup   THC settings , check teh box initial move for G28.1.

Personally I like the initial rapid move, but you have teh choice.

(;-) TP

So thats the reason :)

I will try that and see which one i like best, thanks.

2088
General Mach Discussion / Z-Axis Dro - Odd behaviour?
« on: January 16, 2016, 10:30:48 AM »
Can someone have a look at the video clip I have linked below?

It shows my Mach3 plasma screen before a file load, during file load and then when pressing my "Set Origin" button.

As you will see, the Z is happily parked at 14.991mm which is where it really was after the end of the previous run. When i press set-origin it jumps to 0.437mm then to -0.9mm then to 0.437mm where it stays. The actual axis does not move - just  the DRO freaks out and leaves a meaningless reading on it which puts it in a bad position for a dry run on a new file.

The 14.991mm is wrong as well because my final Z move is always to 15mm dead, the difference  between 15mm and 14.991mm is the reading of the "THC Adjustments" DRO when the last cut finishes, if i run with THC off it always ends on 15mm dead.

Here is a link to a video showing what I believe to be odd behaviour of my Z-axis DRO.
https://youtu.be/WCmHRbIpm1o

Is there any logical reason for this, or a cure maybe???

The set-origin button does this...
DoOEMButton(1008)
Sleep(500)
DoOEMButton(1009)
Sleep(500)
DoOEMButton(242) 'Copy X Y Z to G54
Sleep(500)
DoOEMButton(160) 'Regen Path
   


2089
General Mach Discussion / Re: Probably simple but...(G-Code help)
« on: January 16, 2016, 09:49:07 AM »
Ok here we go...

I can confirm that the Z parameter of the G28.1 code does nothing at all, tried many values and none made any change, the Z does not rapid at all when doing a G28.1, it runs at the value % set for Z in Homing and Limits setup.

Made up the bracket and got that fitted, pictures attached of the final setup. I managed to get the Y-axis shift down to zero and the X-axis shift to 20mm.

A video of it doing IHS and setting to 1mm after. Repeatability accuracy is very tight.
https://youtu.be/Fqn4YaQUq8c

Have moved the post-probe delay to the probe-off macro now, no delays in the subroutine, also gone back to a straight G00 rapid for the probe offset travel.

Works nice :)

2090
General Mach Discussion / Re: Probably simple but...(G-Code help)
« on: January 15, 2016, 05:13:15 PM »


Learning all the time :)

Having a play with this tomorrow

Thanks