computer

[cob]

i am trying to uderstand what ,how and when do you use this type of conpansation (COMPUTER) also what does it mean.
I know when you use WEAR it inputs the g41, g42 on your post,
so that men to me that it is using toolcompansation.
but what does computer do .
if any one can kindly explain would be appreaciated.
thank u

[Joesph Jackman]

i am trying to uderstand what ,how and when do you use this type of conpansation (COMPUTER) also what does it mean.
I know when you use WEAR it inputs the g41, g42 on your post,
so that men to me that it is using toolcompansation.
but what does computer do .
if any one can kindly explain would be appreaciated.
thank u

computer is when you want mastercam to handle all the cutter compensation and the cnc control to handle none of it. some older cnc controls are not very good at handling cutter compensation.

[BZWAK]

What: From My experience "computer" does a crap ton of computations and this is what you will see when you look @ the code, a whole bunch of #'s that are hard to make sense of, based on the tool Dia. Forget trying to edit.
How: Just select "computer" type.
When: I don't.
"Wear" Comp is for small adjustments .00xx Most typical. The program will show geometric dimensions that coincide with the print and call a tool register 41,42 T010101 depending on machine.
"Tool" or "Center" comp I believe is for regrinds. eg. nominal .375dia reground to .348dia
To Make an outside profile smaller tell the machine the tool is only .345dia & visa/versa.
Pretty sure U said MCam!
Out.

[cob]

computer is when you want mastercam to handle all the cutter compensation and the cnc control to handle none of it. some older cnc controls are not very good at handling cutter compensation.

So bassically is the same as Wear the onle difference is it will not post a g41 or g42 right?

so when I am using computer it would be pretty hard to edit just because the is so much going on (right or wrong)


the only reason you would want to use wear would be if you were using a ground endmill that is not to size then you can offset in your offsetts to make you part good?

hope i am making somekind of sence if not please explain for me .

thank you for the replies

[Joesph Jackman]

So bassically is the same as Wear the onle difference is it will not post a g41 or g42 right?

so when I am using computer it would be pretty hard to edit just because the is so much going on (right or wrong)


the only reason you would want to use wear would be if you were using a ground endmill that is not to size then you can offset in your offsetts to make you part good?

hope i am making somekind of sence if not please explain for me .

thank you for the replies

when you use computer mastercam does all the cutter comp and the cnc control does none of it. if you have to change to an under-sized cutter you have to change the cutter size in mastercam.

i agree with bzwak that when you let mastercam do all the cutter comp by selecting computer it is hard to edit the g code at the control because the g code mastercam outputs is not easy to follow.

in my opinion the answer to your first question is right there is too much going on and it is hard to follow.

there are many reason not to use wear. as i already mentioned, some older cnc controls are not very good at cutter comp and have cutter comp limitations that cause errors. when you let mastercam handle the cutter comp these errors do not occur. i always start with using wear but if i have cutter comp problems with an older control i switch to computer because it saves me rather than having to try to sort out cutter comp problems. others will spend the time i do not want to spend and figure out exactly what the problem is and what the control wants.

[cob]

thank you know that made sence
I got the idea.

sence we are on this subject maybe you can explain this?
so I posted a g- code on mastercam:

G43 H0 x? y?
g1 z? f?
G41 D0 x? y?

on the first line H0 do you put any number?
on the 3rd line D0 do you put any number?

bare with I am trying to learn and undestand all this.
thank you

[cadcam]

I must say that wear is your true freind in the machine. some the older controls do not handle cutter comp well I am wondering how old.as the older machines that is all that people did they programed to control manually. the only issue I see is when you get one that does not support "-" value in the control. this were reverse wear comes in.

We have some over 30 year old machines at work and run them everyday 3 shift with cutter comp as they were all program by hand.

Cob the computer takes care adjusting the to to the left of the geo for example but as you said you will not be able to use any comp as the G41 and G42 will not output.

What kind of machine are you programming for?

[Joesph Jackman]

cob, maybe you will find this as helpful as i did when i read it many years ago. by no means should these five be considered the only problems that can occur.

Five Common Problems With Cutter Radius Compensation : Modern Machine Shop

'There are many rules, and when something goes wrong, it can be difficult to diagnose and correct the problem. Just about the time you think you have it all figured out, some new situation arises that you haven’t dealt with before. This can be quite frustrating, especially when a program that has worked in the past is now failing due to some cutter radius compensation alarm. Here we offer five of the most common problems and give some advice for avoiding them.'

[Joesph Jackman]

thank you know that made sence
I got the idea.

sence we are on this subject maybe you can explain this?
so I posted a g- code on mastercam:

G43 H0 x? y?
g1 z? f?
G41 D0 x? y?

on the first line H0 do you put any number?
on the 3rd line D0 do you put any number?

bare with I am trying to learn and undestand all this.
thank you

mastercam should be putting all the needed numbers in if you have entered the correct information and you have a good post and control.

[cob]

thanks for all the replies
but what does H stand for ?
and what does D stand for?
and how do you use them.
just trying to understrand the g- code. program.
I know this is not the right place to post this ?.

[cadcam]

H (H G43) is Height offset

D (D G41) is for Cuter comp value

You have to have at least the H one for tool length from part.
D if you want to be able to adjust more or less cut on part walls for example.

There is the quick and dirty..

[Joesph Jackman]

thanks for all the replies
but what does H stand for ?
and what does D stand for?
and how do you use them.
just trying to understrand the g- code. program.
I know this is not the right place to post this ?.

h is the length offset number for the tool. lets say it is h1. the program will use what you have entered in the cnc control in the length offset page for tool 1

d is the diameter compensation of tool. lets say it is d10. the diameter offset you have entered in the cnc control for d10 is what the program will use.

you should pick up a good book on cnc operating and programming.