'Burny 2.5 Inc' Post modification

[jimbo1986]

Hi,

I've recently installed Sheetcam to produce the G-code for my CNC plasma. I'm using the DNC function to send post-processed G-code to my Burny 2.5 controller, which is working perfectly.

The Burny has a potentiometer to control feedrate, which is set by the op as the program runs. According to the manual it can be configured to use a programmable / digital feedrate which is transferred in the G-code. However, the 'Burny 2.5 Inc' post does not incorporate the feedrate specified in each sheetcam operation into the G-code.

According the Burny manual http://www.cnccad.pl/files/BURNY-2.5-plus.pdf page 160:

WADR.1.12 “F”-FEEDRATE
When no G04 preceeds the “F” value, the “F” key character immediately followed by a numeric
value is used for programmable feedrate. The feedrate value must be in a block by itself.
NOTE
The PROGRAMMABLE FEEDRATE option must be enabled for proper operation.
For example:
“N12 F100” causes a BLOCK #12 FEEDRATE of 100 inches/mm, depending on the operating
system selected.

Any help appreciated in how to go about modifying this post.

Thanks,
Jim

[Les Newell]

Give this a try. To install this post, save the attachment to any convenient folder on your computer then run SheetCam and go to Options->machine->post processor. Click on the 'Import post' button. Using the box that appears, navigate to your post and open it. Go back to Options->machine->post processor and make sure your post is selected.

[jimbo1986]

Thanks Les.

Sorry on the delayed reply. Having a few problems with my Burny not recognizing the feedrate in the code. I've enabled programmable feedrate on the controller, but no luck as of yet.

I've run the PP on sheetcam and it is working in terms of adding the feedrate to the code. But it adds the F value to the end of an existing line eg.

Code: Select all

%
N0010G71
N0020G91
N0030G40
N0040X-4.2Y-2.484
N0050M04
N0060G3X3.2Y3.199J3.199F440
N0070Y119.285
N0080G2X1.0Y1.0I1.0
N0090X120.0
N0100X1.0Y-1.0J-1.0
N0110Y-120.0
N0120X-1.0Y-1.0I-1.0
N0130X-120.0
N0140X-1.0Y1.0J1.0
N0150Y0.715
N0160M03
N0170X1.0Y-0.715
N0180M30

According to the Burny manual, the F value needs to be in its own block, and presumingly before the move? I'm guessing such as this:

Code: Select all

%
N0010G71
N0020G91
N0030G40
N0040F440
N0050X-4.2Y-2.484
N0060M04
N0070G3X3.2Y3.199J3.199
N0080Y119.285
N0090G2X1.0Y1.0I1.0
N0100X120.0
N0110X1.0Y-1.0J-1.0
N0120Y-120.0
N0130X-1.0Y-1.0I-1.0
N0140X-120.0
N0150X-1.0Y1.0J1.0
N0160Y0.715
N0170M03
N0180X1.0Y-0.715
N0190M30

Is it possible to do Les?

Many thanks

[Les Newell]

No problem. Give this a try.

[jimbo1986]

Spot on Les thanks!

I'll give it a try when I have the Burny configured properly for programmable feedrate. From looking at the manual and comparing the G-code, the output from your post-processor is perfect.

Thanks again,
Jim

[jimbo1986]

Tried and tested. Works perfectly.

Many thanks Les!

Jim