×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Accurate and repeatable location for robot handling

Accurate and repeatable location for robot handling

Accurate and repeatable location for robot handling

(OP)
I am currently designing a bio-tech robot that is to have trays loaded and unloaded vertically. It is important that we locate quickly to about 100 micron accuracy (X,Y & Z). We are having a debate regarding the best design for a locating pin/receptacle combination.  Three point fixing to achieve a well defined plane seems the way to go.  However our first thought is to use a tapered pin with a shoulder going into a slight clearance bore and the same pin into an oval bore and a third pin with a third generous clearance bore.  I have been considering using tapered pins into tapered bores / slots but been concerned at variation in altitude due to variations  in taper / contamination etc.
I would really value any ideas and comments

Best regards to all

RE: Accurate and repeatable location for robot handling

By oval you mean a straight sided figure with semicircular ends, right?

In that case you have come up with the same solution as we did for a similar but different problem.

Later it was cost reduced to 3 clearance holes - grrrr.

Cheers

Greg Locock

RE: Accurate and repeatable location for robot handling

Dear,
Positioning is universal problem in the engineering. Now there are couple things to be considerate before giving any definite solutions.
But in general,
1 Use of encoders, LVDT or triangulations sensors are reocmaded depending on the working environment and the product nature.
Use the goggle to know more about this processes. Other wise contact me back with your need. I will be more than happy to share my information.
Thanks

RE: Accurate and repeatable location for robot handling

Assuming it is a 'normal' size robot, ie roughly man size, then 100 micron (4 thou) is a fairly tight spec for placement.  

Cheers

Greg Locock

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources