Need Help!- Im having problems with feed rate

[Fluxion]

Ok, My machine running Mach 3 just started running at only 30 inches per minute no matter what I set the speed at in the cam software or in the g code itself. I have the it set at 92 inches per minute for all axis in the motor tuning tab and everything has been running at this rate for over a year until two days ago. I am at a loss and I am sure it is something really simple that I clicked on. I need some ideas on what to check out here. BTW these problems came up when I tried to run some of the gcode posted in that g code music thread that is currently a few threads below this one.

Thanks in advance for any help, Bryan

[ger21]

Can you post a small sample of code that only runs at 30ipm?

[Fluxion]

G0 G49 G40 G19 G80 G50 G90
Thanks Ger21, Below is a small snippit of code I ran tonight and it will only run at 30 inshep per minute. If you see something I should change let me know.

Thanks again, Bryan

G0 G49 G40 G19 G80 G50 G90
G20 (Inch)
G64
G94
G00 X0 Y0
G19
f50
G2 x0.000 y3 r20 z0 f50
G3 x0.020 y0 r20 z0 f50
G2 x0.040 y3 r20 z0 f50
G3 x0.060 y0 r20 z0 f50
G2 x0.080 y3 r20 z0 f50
G3 x0.100 y0 r20 z0 f50
G2 x0.120 y3 r20 z0 f50
G3 x0.140 y0 r20 z0 f50
G2 x0.160 y3 r20 z0 f50
G3 x0.180 y0 r20 z0 f50
M5 M9
M30

[ger21]

If you do

G1 X0 Y0
F50
G1 X10

Does it move at 50?

I think the back and forth movement in your code is preventing your machine from reaching full speed. Increasing the acceleration should help, if your machine can do it.

[Fluxion]

Sorry I didn't get back here sooner. I did try your code and it does move at 5o inches per minute. I am getting ready to try running another program and I'll see if it works at a faster feedrate. every thing I have been running for the last few days has been with a 0.020" end mill cutting mother of pearl so I can[t use a feed rate much faster than 4.5.

I'll report back soon.

Thanks, Bryan