What's new
What's new
By:
Advanced search…

Search results

  1. G

    soft jaws for raw stock and fitting news hard jaws on old chuck

    thanks for your replies. Yes in some cases the finish size is close from the raw stock, 169mm finished for 170 raw (more like 171 when measured...) but I can get around that by altering the process. Sort of shouldered flange, I can grip on where the shoulder side for op1, turn the short 169mm...
  2. G

    soft jaws for raw stock and fitting news hard jaws on old chuck

    Hello ! two questions about clamping raw stock on lathe chuck. We run quite a lot of steel in (at least for me) quite big diameter, 150 to 200mm. Not too long pieces (max. 150mm) but stock have rust, scale and is not too round. My boss told me to use soft jaws bored to the stock diameter...
  3. G

    fanuc 21i variables

    I checked the parameter, il can edit variables. Some of the 500 variables are used in the MTB own G and M code, so i think they have protected them ? Anyway I czn use the variables up to 999, so even if some of the 500 variables are locked there is still plenty avalaible !
  4. G

    fanuc 21i variables

    hello guys ! Continuing to discover the special features on my machine with a fanuc 21i-TB control. I attempted to reproduce a macro I had on my previous job, used #501 to #503 variables, got strange results. I went to check in the macro variables, I can't change the variable from 500 to 530...
  5. G

    Tangential tool holders versus traditional turning tool

    Sorry to hijack the thread, but I have always wondered: what are the advantages of theses tangential tool vs. old knux insert? I don't see them used much nowadays, don't know why? I think they are great for heavy roughing with their positive geometry, I am right? Never used they actually, if...
  6. G

    VBMT moving into holder?

    quick update: re-started this morning with the same tool, but changed to 0 .25mm left in X (radial) and 0.1 in Z. The insert moved again, I could see that the faces were not clean. Changed to a SECO DNMG finishing tool (clamped insert), no problem then. I could see some area on the face were...
  7. G

    Fagor 8055TC Restoring Problem

    press "X" or "Z" then "zero" (not the number, the button with zero written on it) and cycle start. Can only be stopped with the e-stop see: https://aceronline.net/acergroup/atl_cnc_lathe_work/man_8055tc_opt.pdf page 40
  8. G

    VBMT moving into holder?

    Will try that tomorrow once back to work. The deflection/undercut makes sense with too much stock left on the faces. I'll check if the faces still have a good finish with less stock left. Never had a problem at my old job with clamp and pin/screw MVJN holder at my old job. I only have screw...
  9. G

    VBMT moving into holder?

    thanks for all your replies ! yes right holder for the insert, both sandvik. Holder is almost new, still black with no chip marks and no visible damage (you know the "new tool" look!). insert not new, it has been doing some parts but not showing excessive wear. No problem of other people...
  10. G

    VBMT moving into holder?

    Hi all ! Got an "interresting" problem happening yesterday. Parts were running fine, and then the OD was .25mm lower ! Roughing was not broken so no finishing tool digging due to too much stock left. Finisher also not broken... I'm using a VBMT insert with .4mm nose radius for finishing...
  11. G

    Fagor 8055TC Restoring Problem

    Hello! Did you try a zero reference return? My former fagor used to do that when it used to shut down by itself due to "electronic gremlins". Everything to zero (x, z, s, tools, tool change position...) but it came back to lire after a zero reference return.
  12. G

    Fanuc 21i-TB parameters locked

    OK got the solution today. It's a CMZ machine with a fanuc 21i-TB control. In order to unable the parameter to be modified, it is in the custom menu. Pretty well hidden and it is not in the different menu avalaible with the soft keys but using a shift+G on the keyboard.... my tool change...
  13. G

    Fanuc 21i-TB parameters locked

    OK I'll try that and report here.
  14. G

    Fanuc 21i-TB parameters locked

    Will it work with the PWE on "0"?
  15. G

    Fanuc 21i-TB parameters locked

    Got an idea today, what about using G10L50 to modifiy the parameters? then G11 once done and it should change the parameters I need no? I have found this program: #101=#5021 #102=#5022 #103=#5023 #104=#5024 G10 L50 N1241 P1 R#101 N1241 P2 R#102 N1241 P3 R#103 N1241 P4 R#104 G11 M30 here...
  16. G

    Fanuc 21i-TB parameters locked

    Thanks for your reply. I'll do that. The machine is actually second hand and was installed before I arrived at this new job. The person who had the training on it is now gone (I'm the replacement!) and have to figure out everything on my own. My boss told me they use a "keyboard" in order to...
  17. G

    Fanuc 21i-TB parameters locked

    yep I got two, one for using the handle with the door open, one for panel edit. Neither got any influence on the result...
  18. G

    Fanuc 21i-TB parameters locked

    Hello everyone! After my troubles finding how to change my fixed sentences in manual guide, here's another strange finding on my "new-to-me" machine! in order to move to the tool change position we need to use this code: G0G53X180 G30W0 I'd like to use G30 or G28 for both moves, using a...
  19. G

    Editing manual guide fixed sentences

    OK I got it today. The machine is "french" fanuc despite being spanish so I think there is some confusions in the translations. I need to go the the FIXFRM menu and then to edit the already existing fixed form I need to press the "create" button. Yep a bit misleading but it quite an old control...
  20. G

    Editing manual guide fixed sentences

    thanks for yuor reply. At the moment we cannot export files on a PC from the machine, no USB port and not connected... So I'm looking for editing the fixed sentence directly on the controller at the moment (connecting the machine is in progress, via the PCMCIA port !)

ABOUT PRACTICAL MACHINIST

With more than 10.6 million unique visitors over the last year, Practical Machinist is the most visited site for metalworking professionals. Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. Register for the world’s largest manufacturing technology forum for free today to stay in the know.

Learn more about us.

LATEST INDUSTRY NEWS

STAY CONNECTED

Facebook Instagram YouTube LinkedIn Pinterest Twitter Tiktok

Register Become a forum member. Register today.

Sign Up Sign up for our e-newsletter.

© 2021 Copyright Practicalmachinist.com. All Rights reserved.

Top