G-Code help needed

[LS120]

Ok i'm new to this & im havig problems with the size of some drawings i got.

my table is 800mm (Y) x 1800mm (X)

i've loaded some files in marc3 & they show in the Minus (-) and some 3-4 times my table size..

other things are what are the G-Code letters stand for??

x,y,z i know

f = Feed rate ?
L =
M= (had m5 & m30)
J =
S =
G1 =
G3 =
G53 =
G80 =
G49 =
G90.1 =

do i need these or can i edit the G-Code and remove them??

also my machine moves 421.4 units/min

but the files when it cuts runs at 1.49 units/min.

any help welcome..

thanks from NZ

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[hemsworthlad]

other things are what are the G-Code letters stand for??

x,y,z i know

f = Feed rate ?
L =
M= (had m5 & m30)
J =
S =
G1 =
G3 =
G53 =
G80 =
G49 =
G90.1 =

f=feed rate
L = Number of repeats in peck drill cycle
M= (had m5 & m30) M5=stop spindle M30 program end rewind M3 start spindle
J = part of G3 arc move see I J
S = spindle speed
G1 = move at set feed rate G0= move at rapid feed rate
G3 = Counter clockwise Arc move G2=clockwise
G53 = Move in absolute machine coordinates
G80 = Cancel canned cycle IE: peck drill
G49 = Apply positive tool length offset
G90.1 =Absolute mode G91.1=distance mode

If you look on the Mach screen next to the reset you'll see buttons for G-code & M code they will tell what each code does.

[TSJ]

Also look at the manual for Mach3. I could not get a subroutine to work properly until I saw in the manual the the "Oxxxx" line can not have a number sequence on it. Took off the "Nxxxx" from the subroutine lines and all works well.

[LS120]

ok i've found out what they mean

now ive set the f=20 & its ok but the router seems to be burning the dust, i'm using 4.75mm & a 3mm 2 flute bit to cut out the bits..

router is at max speed (28,000 rpm) it's a fuller (dermal type clone)

any ideas?

thanks for the help.

[ger21]

You need to go much faster, more like F1000-F2000. Or lower the rpm.

[BobWarfield]

BTW, if you're looking for help learning g-code, the G-Wizard Editor has a "Hints" view that decodes it to English:



The beta test is free: GWizardE: A Machinist's CNC G-Code Editor

Cheers,

BW

[LS120]

ok after all this & pushing the X axis to F1000 the coupler broke.....



have 3 more ordered just in case the others do the same..

will be a couple of days.... then i can re-try.

[LS120]

ok got the new couplers & installed the one that broke...

one question i have is with DXF files i load into Mach3 ?

the dxf files i load seem to be in the minus of the Y like -59Y

my table is from 0.0 x,y also the Y seems to be long like my X is Long & the x my Y is shorter..

how can i move , re do the drawing to only goto 0,0 & not into the - minus

thanks