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Author Topic: CV G64 and Exact Stop G61  (Read 4975 times)

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Offline Mauri

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Re: CV G64 and Exact Stop G61
« Reply #10 on: December 28, 2016, 05:04:26 PM »
Chaoticone,
Where does the CV feed rate by angle get stored once enter onto the CV Panel?
Is the any other quick way to set all 180 angles settings to say 10?
If the settings are Zero does that mean a complete stop at the end of an angle?
Regards,
Mauri.

Offline Chaoticone

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Re: CV G64 and Exact Stop G61
« Reply #11 on: December 28, 2016, 05:51:37 PM »
The settings are saved in the profile.

Code: [Select]
If the settings are Zero does that mean a complete stop at the end of an angle?
Yup, if all the settings are set to 0 and CV feed rate is turned on and your running in CV mode it should run essentially the same as it would if running in exact stop mode.
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Offline Mauri

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Re: CV G64 and Exact Stop G61
« Reply #12 on: December 28, 2016, 09:26:40 PM »
Chaoticone,
Yes, I worked that one out.
A quick was to change the angle setting on all 180 is by editing the CV_Feedrate.mcs file.
--      grid:SetCellValue(i, 0, string.format("%.3f",feedrate))
      grid:SetCellValue(i, 0, string.format("%.3f",10.000))
This for example will make them all 10.000.

Below are some Exact Stop us a 2.5D G-Code file made by Rhino5/madCAM5 using a 30Deg included angle with a .05mm Radius tip Cutter.
4 Display below of Mach4.

I also did the same with Mach3 Exact Stop, however the line display only joins up the dots that it makes and these dots do not represent all of the toolpath hence it looks as if it does not follow the path.
However all the dots are on the Toolpath line.
1 Display below.

On Mach4 I do not know how the program display is written so I cannot also say if the lines are correctly representing the Toolpath.

Regards,
Mauri

Offline Mauri

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Re: CV G64 and Exact Stop G61
« Reply #13 on: December 28, 2016, 09:28:10 PM »
Chaoticone,
Max files was 4 so here is the last one.
Tomorrow I will do some CV Tests.
Regards,
Mauri.

Offline Mauri

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Re: CV G64 and Exact Stop G61
« Reply #14 on: December 29, 2016, 02:17:54 PM »
Hi,
I have run some samples using CV and with the same 2.5D example on my previous mail related to Exact Stop.
In my previous runs although I had G61 set in the Configuration file, but I unfortunately had G64 in the code as I always used it in Mach3.
So I re-ran it and it does appear to be the same as CV 0. (see below)
The settings are all 180 angles at 0, 10, 50, 100, 400 & 1000.
The G-Code has X/Y at F400 and Z at F80 in simulation Mode with no Controller attached.
When you run it with all (180) angles at 1000 it seems to use 0 in the actual Mach4 program and Toolpath display.
Regards,
Mauri.

Offline Mauri

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Re: CV G64 and Exact Stop G61
« Reply #15 on: December 29, 2016, 02:22:37 PM »
Hi,
The remaining CV runs all angles at 100, 400 and 1000.
I will try next using Mach4 with the Controller in bench mode (no Mill) and see what it does.
Regards,
Mauri.

Offline Mauri

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Re: CV G64 and Exact Stop G61
« Reply #16 on: January 02, 2017, 06:05:28 AM »
Hi,
I apologize for any confusion and inaccuracies with my previous CV findings.
I have found that in a number of CV runs above, (in my mail) the CV was not applied correctly, hence a number were just the same or totally incorrect.
I found this out when I found some run times were the same when I made further tests.
To address this I decided to enter all my CV entries (180 angles) directly into the Machine.ini File.
The following JPG’s show finally, the correct display of each CV setting.
I ran CV 0,10,50,100,400,700 the G-Code has X/Y/Z in cutting mode all running at F400.
Each time the Machine.ini file was changes (CV Values) and Mach4 was run the CV table was checked to confirm that change.
The main reason for using CV is that we all do not have expensive HS Mills or Routers that have high tolerances and fast acceleration capabilities, so we require CV to reduce cutting time on long 2.5D and 3D runs and produce a suitable result.
Times for each run:
CV = 0 = 40:33.02mins best of all but not suitable for long machining runs as time would be excessive.
CV = 10 = 39.14.25mins very good but slow.
CV = 50 = 34:35.71mins not as good as 10 but could still be a reasonable cut.
CV = 100 = 29:48.70mins not suitable for fine carving/engraving 2.5D or 3D machining.
CV = 400 = 19:00.04mins very rough on angles.
CV = 700 = 19:04.07mins not sure why it took longer than CV=400 made no real difference as the max speed on X/Y/Z was F400.
Regards,
Mauri.

Offline Mauri

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Re: CV G64 and Exact Stop G61
« Reply #17 on: January 02, 2017, 06:08:08 AM »
Hi,
Remaining 2 JPG's CV 400 & 700.
Regards,
Mauri.

Offline ger21

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Re: CV G64 and Exact Stop G61
« Reply #18 on: January 02, 2017, 08:25:16 AM »
Are you sure that Mach4 is displaying the actual toolpaths?
You posted an image of the Mach3 toolpath window earlier in the thread.
Mach3's toolpath is update 10x per second, and only shows the position that the machine is at when it updates. As such, it's not an accurate representation of the actual toolpath. The faster the feedrate, the less accurate the display is.
I'm just wondering if Mach4 is the same?
Gerry

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Offline Mauri

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Re: CV G64 and Exact Stop G61
« Reply #19 on: January 02, 2017, 02:28:56 PM »
ger21,
Your right on Mach3, when it does dots they are spread apart and if you turn on lines they just join the same dot positions, so it does not represent the true accuracy of DV in Mach3.
I know that I get good results from Mach3 with 2.5D/3D and lines like tiny lettering.

With Mach4 if you blow up the image Toolpath and show it in 3D, you will see that it draws the line with on the G-Code line there is no jerky movement or jumps, so I feel sure it is a true representation.

Regards,
Mauri.