Need Help!- Bar Feed Program for Haas Lathe

[wganders]

Does anyone know how to program for a lathe bar-feeder? Any sample programs out there!

I know how to program a part but don't know how to program a bar feeder. How to check for the bar or any other variables that need to be considered.

Please help!

Thanks,
wganders

[g-codeguy]

I don't think you have given enough information. Programming the barfeeder depends on which barfeed you have. They are not all programmed the same way. For example, on our Hardinge lathes using their barfeeders you simply position the barstop, open the collet, give it time to push the bar, close the collet and machine. (I actually stop ahead of where I want to be and push it in a bit after the bar feeds out, but...)

On the LNS & SMW barfeeders it is a little different. It can even be different between certain models of a manufacturer.

I know you are busy, but take the time to supply enough information for others to help you. Most of us enjoy passing our knowledge along. BUT...it is hard if the poster makes us guess. Many won't even bother to reply.

Sorry. I know I am getting old and grouchy. Don't take offense. It is just that I see this scenario all too often.

[wganders]

OK!

We're getting a Haas SL-20 with a Haas Servo 300 bar feeder. Could anyone post sample programs? I'm sure it's easy but I just started this new job and they think I know everything about machining/progamming.

Thanks in advance.

Wganders

[Geof]

In the upper right of this page there is a search window; not the browser one right at the top another one that just searchs CNCzone.

Put 'Haas Servo 300 bar feeder' in this window and you will find dozens of posts that mention this bar feeder. You should be able to find what you need somewhere in these posts.

EDIT: You have to scroll to the top of the page to see the search window I mean. It is not visible when you are reading this post.

[g-codeguy]

Originally Posted by Geof In the upper right of this page there is a search window; not the browser one right at the top another one that just searchs CNCzone. Put 'Haas Servo 300 bar feeder' in this window and you will find dozens of posts that mention this bar feeder. You should be able to find what you need somewhere in these posts. EDIT: You have to scroll to the top of the page to see the search window I mean. It is not visible when you are reading this post.

Once I saw "HAAS" I figured you could help him if anyone could.

I cut-and-pasted your search criteria. I saw nothing that would help the OP with programming his barfeeder. Did I miss something?

Like I said before, the Hardinge barfeeders are a breeze to figure out. (I believe their manual gives a barstop example.) The others I am familiar with require code that would be impossible to figure out without a sample from the barfeed manufacturer. They use different M-codes for loading a new bar. Also you need a block like

/2 P8000

How would a person figure this out without a manual telling how to set the barfeeder up? If the OP is getting a new machine, then all this information should be supplied with the machine/barfeed. If used, then maybe they left the barfeed subprogram in the control. Of course not everyone uses a subroutine, but programs the whole barfeed operation in the main program. We've bought used before, and usually there will be at least one program left in the control. Hopefully it would include a barstop operation.

Here is my program for barfeeding the Hardinge lathes. All use Hardinge barfeeds except one. Think that is an LNS.

N100G10P0Z-1.5 (BARSTOP)
G200
M1

Here is the one I use for the Daewoos/Nakamura Tome (SMW/LNS barfeeders)

N3200G10P0Z-8.63 (BARSTOP) (I don't set the workshift on the Nakamura)
G65P9018X1.05F.01S900M4000T808
M1

The Hardinge subprogram barstops and goes back to the main program. The Daewoo/Nakamura barstops, dresses the new bar and then goes back to the main. My example is for 1 inch 52100 material. S900 = SFM, M4000 = 'S' in G50 block. Other 3 values are self explanatory. Actually there are a couple other variables depending on which model Daewoo the program is for.

I would have to be at work in order to post what is in the subprogram calls. Sorry but I don't have that memorized. This information isn't going to help anyone without knowing what is in the suprograms. I doubt what is in the subprograms would be of much help unless you were using the same machine and barfeeder.

I imagine that the barstop operation for your 'shop made' barfeeders (nice BTW ) would be similar to the Hardinge one, although it would be a simple matter to also dress the new bar. Doubt you use the /2 P8000 in your barstop routine.

[tex]

Here'a a barstop subroutine I've been using on HAAS SL-30...unfortunately, I can't remember the name of feeder vendor (it was not original HAAS):

%
O01022 (BARSTOP FEEDER SUBROUTINE)
G21 G54
T1212 (BARSTOP TOOL)
M05
G04 P1.
G00 X200. Z200.
G00 Z5. X0.
G98 G01 Z1.5 F1000.
M11
M51
G04 P5.
M96 Q26 P100
M61
G04 P4.
G01 Z150. F5000.
M121
G01 Z1.5 F2000.
M10
G00 Z200. X200.
G99
M99
N100
M61
M10
G04 P1.
G01 Z5. F1000.
G00 X200. Z200.
G99
M99
%

[wganders]

Thanks Tex,

That's exactly the kind of sample I'm looking for. It looks like you position a stop for the bar feeder to push against. Is that correct? Do you have any idea what all the special codes do? Like all the special M codes, etc... I hate to seem dumb but I like to get as much detail as I can.

Thanks again,
Bill

[wganders]

Sorry I missed it but thanks to G-Codeguy for his information! It is much appreciated.

Bill

[Geof]

This link takes you to a page on the Haas website:

http://www.haascnc.com/custserv_updates.asp#manualupd

Scroll down about halfway and you will see a column with this at the top:

Turning Centers Manual Addendums

The first entry in this column is:

Bar 300
96-0013AJ

This is a pdf file that has all the information about setting up and operating the Servo 300 barfeed; you can download it.

[tex]

Originally Posted by wganders Thanks Tex, That's exactly the kind of sample I'm looking for. It looks like you position a stop for the bar feeder to push against. Is that correct? Do you have any idea what all the special codes do? Like all the special M codes, etc... I hate to seem dumb but I like to get as much detail as I can. Thanks again, Bill

You're very welcome.

Yes, I've been using a specially made, but simple, tool as a bar stop. It was mounted like all the other tools, similar to the one on the attached picture.

I know what "G" and "M" functions do. There is a simple file that lists all the HAAS G and M codes, I could mail it to you. You will find all these functions listed in the manual, which should be downloadable from HAAS site.

M05 - SPINDLE STOP
M10 - CHUCK CLAMP
M11 - CHUCK UNCLAMP
M51 - OPTIONAL USER M CODE SET
M61 - OPTIONAL USER M CODE CLEAR
M96 - JUMP IF NO SIGNAL (P,Q)
M99 - SUB-PROGRAM/ROUTINE RETURN OR LOOP (P)
M121- OPTIONAL USER M CODE INTERFACE WITH M-FIN SIGNAL

You don't seem dumb at all. A few years ago, when I had a lot of trouble programming SL-30 to do a thread deburring routine, guys from this forum helped me and their help was priceless!

[tex]

I’ve forgotten to mention that units in the barstop subroutine I'd posted above are millimeters.

[paul gibson]

Look inside the door on the controls, both of ours have the G & M codes posted there for a reference. As well as pressing "Help" on the control panel and getting them listed for you on the monitor. If you have a Haas rep that frequents your shop, ask if they still have the little red or green books with lots of tips and notes. Usually give 2 or 3 out when you get a new machine.
Frequent their website, has a lot of helpful info.

regards
P.G.