|geoff adams||13/03/2018 15:57:06|
|74 forum posts|
g71 stock removal
I have seig kc4s cnc lathe it runs on a Chinese version of fanuc the manual is something else totally useless
iam trying to use g71 to machine from a 45 mm dia bar down to 28.5 dia by 28 in length in .5 cuts this is the code I have written as far as I understand it
idont understand how it knows what dia to start from the finish dia is in the code
g0x50z5 move to safe zone
g71u.5r4. depth of cut .5 retract 4.
g71p100q2oou0w0f50 block nos for profile no finish cuts
where am I going wrong
12663 forum posts
How are you going to get a 28" bar into a lathe with 14" between ctrs?
|geoff adams||13/03/2018 16:39:37|
|74 forum posts|
Jason its mm sorry if that wasn't clear its the principle 0f g71 I need to understand
|114 forum posts|
Geoff have a look on practicalmachinist.com/needG71info. Seems there are two sorts, one line and two line, from what I remember you start at first cut diameter in X with clearance in Z
|michael warren 1||13/03/2018 17:25:44|
|2 forum posts|
Hi if your stock size is 45 mm i would rapid move to G00 X 46. M08;coolant on, then rapid move to G00 Z1.; Then G71P101Q102U.2W.1D.5F.2: this will leave .2 on the diameter and .1 on the face for a finishing cut, it will take a .5 depth of cut at a .2 feed rate, then the following.. N101Z1.G00X28.5; (diameter required) G01G42Z0.F.1; (turns tool nose compensation on and feeds to Z0.also finishing cut feed rate.1) G01Z-28; (feeds to Z-28) G01X45.5; (feeds up the rear face) G40; (tool compensation off) N102; G70P101Q102; (finish cut amount left on in G71) M09; (coolant off). G00X200.Z300.; M30; may make a bit of sense.
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