Previous in Forum: ETAP Synchronous Generator Inertial Response   Next in Forum: VFD Chokes are Choking Me Out!
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
4 comments
Rate Comments: Nested
Kataeb
Associate

Join Date: Oct 2013
Posts: 26

To Stop or Not to Stop, a CNC Magazine at Position for Tool Change

03/06/2018 4:59 AM

Kindly, we are running the below cnc machine, after finishing a control and servodrives upgrade.
But, we are having some problems to stop the tool magazine at the exact position for tool change.
It is rotated by an hydraulic motor, which is controlled by hydraulic valves, making it very difficult to control the stoppage position.
Have you seen any cnc tool change similar to this one?
Any recommendations? ideas?

MAZAK AJV-18N CNC Vertical Machining Center
http://www.gaec.com/catalog/machines/k13587.htm
Yamazaki AJV18N
https://www.youtube.com/results?sear...amazaki+AJV18N
(2nd 3rd ... videos)

index motor (hydraulic)
EIS 160-2PC-2AH0-LL
valve
SL-G01-A3X-GRT-C1-9320B
valve
SL-G01-C5-GR-C1-9320B

__________________
 ...anything that can go wrong will go wrong...
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#1

Re: to stop or not to stop, a cnc magazine at position for tool change

03/06/2018 5:01 AM
  1. As there is a <...we...>, what is the consensus of this group?
  2. What did the equipment manufacturer say during recent telephone calls on the topic?

The forum cannot know these things until they are stated.

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
JPool
Guru
Engineering Fields - Mechanical Engineering - New Member Fans of Old Computers - TRS-80 - New Member Popular Science - Weaponology - New Member Safety - Hazmat - New Member Hobbies - Fishing - Fish On! United States - Member - New Member

Join Date: Apr 2012
Location: Detroit MI, USA
Posts: 2496
Good Answers: 271
#2

Re: to stop or not to stop, a cnc magazine at position for tool change

03/06/2018 6:22 AM

Sounds like you could use a detent mechanism to stop it at the correct position.

__________________
 How we deal with death is at least as important as how we deal with life. --CAPTAIN KIRK, Star Trek II: The Wrath of Khan
Register to Reply
NotUrOrdinaryJoe
Guru
Popular Science - Cosmology - New Member Technical Fields - Technical Writing - New Member Engineering Fields - Energy Engineering - New Member Engineering Fields - Electrical Engineering - New Member Engineering Fields - Control Engineering - New Member Engineering Fields - Electromechanical Engineering - Old Member, New Association

Join Date: Apr 2008
Location: Lexington, KY
Posts: 1639
Good Answers: 73
#4
In reply to #2

Re: to stop or not to stop, a cnc magazine at position for tool change

03/07/2018 12:30 PM

I found that such mechanisms add to the wear and tear substantially. There are special servo motors that have 615,000 steps or so per rotation. Kind of expensive but it out performs any detent device.

__________________
 A great troubleshooting tip...."When you eliminate the impossible, whatever remains, however improbable, must be the truth." Sir Arthur Conan Doyle
Register to Reply
SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#3

Re: To stop or not to stop, a cnc magazine at position for tool change

03/06/2018 9:24 AM

Electro-Hydraulic Motion Control Systems

https://www.controldesign.com/articles/2008/105/

https://www.designworldonline.com/a-second-look-at-electro-hydraulic-motion-control-systems/

__________________
 All living things seek to control their own destiny....this is the purpose of life
Register to Reply
Register to Reply
Have a Different Question?
4 comments
Copy to Clipboard

Users who posted comments:

JPool (1); NotUrOrdinaryJoe (1); PWSlack (1); SolarEagle (1)

Previous in Forum: ETAP Synchronous Generator Inertial Response   Next in Forum: VFD Chokes are Choking Me Out!

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (60 right now)
Show Members
Advertisement