Programmable Feedrate

[jim_cliff11]

Hi,

I've set my Burny 2.5 controller to use programmable & digital feedrate input, using the method described in the manual (SERV --> SER10 --> SD62 --> 0C000005). The digital feedrate lets me enter an exact value using the keypad instead of relying on the potentiometer. The programmable feedrate allows the value to be integrated into the program code.

I've modified a simple program I processed on sheetcam to cut a square, and added the F code as in the Burny manual.... but it doesnt work. Feedrate stays at the POT value or keypad value.

This is my sample code in WADR format:

%N0010G71
N0020G91
N0030G40
N0040X-4.2Y-2.484
N0050M04
N0060F440
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

The Burny manual says

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.

Page 18:

The cutting speed is controlled by the operator using the speed dial and the “HI-LO-OFF”selector switch or by the NC programmer with the insertion of feedrate commands in the actualpart program. The traverse speed used to get from one cut to the next is preset duringinstallation. This allows the speed dial to be set at a slow speed for the cutting process and stillmove at a high speed to get from one part to the next.The PROGRAMMABLE FEEDRATE option allows the feedrate to be controlled from the partprogram. The feedrate option must be enabled and the correct bit set in “SD62-SYS CONFG2”.See the section “SETUP AND CONFIGURATION”for programmable feedrate information.Once a program contains a programmed feedrate code, the control is automatically switched tothe digital feedrate mode where the normal speed pot is now a 0-100% override control on theprogrammed feedrate. Pressing the feedrate button, or selecting DSPY03 displays the currentdigital feedrate (scaled by the 0-100% override pot) and allows the programmed value to bealtered by either scrolling or entering the new feedrate on the keypad.

F is in its own block before the move command, yet it has no effect on the Burny.

I'm not sure whether the G-code is wrong, or I've not configured the Burny properly to accept programmable feedrate.

Does anyone have an example program with F specified for a Burny 2.5, 2.8 or 3?

Thanks

Similar Threads:

• programmed feedrate different from actual cutting feedrate
• Feedrate override vs programming a faster feedrate?
• m+ programmable coolant
• programmable tailstock
• programmable coolant

[jim_cliff11]

Issue sorted.

SD62 is the correct way to enable / disable the programmable feedrate function. BUT, it wont work unless the factory had enabled the 'programmable kerf and feedrate' addon when the controller was originally purchased, obviously at an additional price. You can check if this is enabled by pressing DSP, entering 80 on the keypad and pressing enter which scrolls through the status of various additional premium functions.

I called Lincoln Electric in the States, who advised me to contact Alpha Tek Auto in Ohio who deal with everything Burny. These guys know their stuff on the older controllers.... as such it's now working.