July 23, 2019, 05:32:38 AM
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 Tips for buying used robots

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August 19, 2010, 03:57:18 AM
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Hello friends:

Many people are off late buying used robots and i thought it will be useful for used robot buyers as a reference.
I have numbered them for convenience so i request anyone who adds a tip to continue the numbering...
A few tips to consider while buying a used robot:

1) Always buy robots only from reliable sources (known companies or companies that have a reputation to protect)
2) Inspect the robot for missing hardware, software, batteries, physical damages, motor or reducer damages, big backlash etc.
4) Inspect the Teach pendant and the related cables
5) Check for the required IO board (or atleast a one that you could use)
6) Try to avoid autions with "as is  where is condition" terms
7) Do not buy too old robots - you will end up paying more for spares than the robot itself
8) Always insist on the manuals - robot manuals + the peripherals if accompanying
9) Ensure that the key spares for the robot are available in the market prior to buying the robot - Identify the spares suppliers too..
10) Be aware of the licensing policies from the used robot manufacturers. Make sure of the robot manufacturers' charges.

Today at 05:32:38 AM
Reply #1



August 19, 2010, 04:13:21 AM
Reply #1


11) If you are not a robot expert, hire a qualified company / personnel. A few more dollars will ensure a good buy
12) if necessary get the robot refurbished / overhauled. A good start = lesser trouble during operation.
13) Greasing is recommended
14) Buy a couple of small spares alongwith the robot - fuses etc
15) If possible include the robot training in the deal - however it is recommended to avail this service from experts
16) Remember the packing and handling charges are additional.
17) Do not forget the applicable duties and taxes in addition to the transportation expenses
18) Avoid online buying - usually you discover a lot more that what is mentioned on the specifications
19) Some bigger companies offer warranty - check all the terms and conditions. read the fineprint meticulously
20) validate if the robot purchase meets the reach, payload and the accuracy requirements of your application

August 21, 2010, 05:14:12 AM
Reply #2


Robotter: An excellent post, this one is a keeper. Thank you. :biggrins:

August 23, 2010, 11:53:32 AM
Reply #3


.... some more points..

21) if you get to carry out a health check by powering up, check for abnormal noise in each axes
22) You should also check the motors for overheating and over torqing in extreme stretched conditions
23) find out if you need a certain grade of IP protection on these robots depending on your application

November 08, 2011, 01:38:20 PM
Reply #4


« Last Edit: November 08, 2011, 01:50:46 PM by jlevis »

March 06, 2012, 10:15:20 AM
Reply #5


a additional point:

24) dont forget, that if you want to use that robot in Europe you need the CE certificate

June 06, 2012, 03:46:59 PM
Reply #6


25) Check the controller cabinet matches the Manipulator- many are mismatched
26) Always have the original Operating software and Key i.d. disc or robot number- very expensive to get a replacement

Today at 05:32:38 AM
Reply #7



May 06, 2013, 04:13:25 PM
Reply #7


Depending on your son's age and your location I recommend that you check your local community college/technical school for a robot class.  Many offer night classes which make scheduling much easier.  Also keep in mind on-line course work is not for everyone nor are all on-line classes the same in content, presentation, instructor skill, etc.

There may also be a robot club at a local school where he can learn from other enthusiasts.

February 11, 2014, 01:39:55 PM
Reply #8


Those tips are really helpful. Thanks for your effort guys. :icon_wink:

May 21, 2014, 02:03:38 PM
Reply #9


27. Check with the Manufacturer to see when they stop servicing the legacy robots.


June 25, 2014, 06:07:51 PM
Reply #10


28.  Check that the index (0) marks are legible on each axis.  Some day you will have to zero your machine and it would help to have these marks to know if you are in the right ball park.
Thank you!


David Ellis

March 06, 2015, 09:48:14 AM
Reply #11


Check it twice, to be sure that CE is up to date, because there where changes in EU law in last few years.
When you will have to give final customer/end user  CE for robotic cell, you can have problem if one of components is not fulfill law demands.
There are no impossibles, there are only possibles waiting to be found.

July 06, 2017, 03:11:42 AM
Reply #12


Thanks for all tips, I add:
29) Buying a robot system without warranty: Make sure there is a warranty offered with the used system. A used robot supplier should offer a warranty with certified parts and labor. Technical support should be offered with the warranty.
30)Buying a used robot from an online venue: You will find many great bargains online, but beware of the lack of warranty, service, and support you are getting with the robot. Plus, there is no guarantee that the robot will work when you get it.
« Last Edit: May 14, 2019, 01:36:25 PM by Nation »

August 23, 2017, 05:46:12 AM
Reply #13


These are the top 5 tips for buying the robots
  • Avoid robot auctions
    Check for warranties and guarantees
    Find a supplier with a parts and service department
    Require complete robot refurbishment
    Ask about manuals and training
To Know more with the practically visit once :- http://www.cetpainfotech.com/technology/Robotics-Training

Today at 05:32:38 AM
Reply #14



August 24, 2017, 07:11:50 AM
Reply #14


First of all make sure there is a warranty offered by the used system. Always buying robot from an experienced dealer. Try to buying robot from an auction because this may become visible to be a great bargain, but be alert of the lack of warranty, no guarantee that it will even power up and the lack of past history in my terms these are the valuable tips you cease use while purchasing used robots.

October 23, 2018, 08:35:43 PM
Reply #15


Here is our experience with older robots.

Bought 2 Fanuc S430iW with RJ controllers for $ 3500 each plus $ 900 shipping. Boths in good working order. Approx. 13k verified hours.
Received and installed them. Couldn't find any integrators available unless we wait 3 months.
We decided to relicense those with Fanuc and get 24/7 Fanuc support access. Best $ 1,800 we ever spent.
Took us 1 months to figure out a lot of little things because we had no clue whatsoever. Never looked at a robot before.
Lots of long nights researching online and reading manuals.
Lots of trouble shooting little things to find out, NO a full size DeviceNet card cannot work together with a fullsize IO analog or digital IO in the controller slots. Fanuc needed 2 days to figure that out. No big deal. So we are using RO (arm end IO). Those things took easily 2-3 days to figure out.
Spent a lot of research to find out what we need to make a mig welding robot out of this. Got Lincoln 455r power unit, cables (expensive), torch, and many small bits and pieces and got them all hooked up AND talking. that took a months or so.
Sure, there are a few things they would be much easier with newer systems. I.e. we are using DeviceNet I/O. What a pain to set that dated technology up. Also the memory card thing. But having started on computers during the pre-windows DOS times helps to comprehend the basics. No plug and pray here.
Make a long story short. Was it easy? NO. Is it for everyone? NO. Does it take determination and a good technical background and understanding and a will to never give up? ABSOUTELY. But...does it work? Well, see for yourself as our robot puts 852 welding spots to make a louver panel here:

The programming was a challenge. But mostly because of a lack of experience and knowledge. We improved the program a lot for example by splitting a 2200 line program in 38 separate ones for each row and then call the next program. That adds adjustability and stability on the software side. In other words. Be creative. Never give up.
So what you are seeing working here cost us less then $ 20k. Will it be forever? Heck no. But we have no a low cost way to find out if we can do robotic manufacturing. Find out if it is the right thing for us to get deeper into. And YES we are always planning to upgrade to a much newer system soon. Vision guided. Probably sticking with Fanuc/ Lincoln.
Considering that Mig welding is one of the harder things to teach a robot, especially with so many spots and motion movements, I believe not too bad.
I found several small to midsize companies in our area and industry who bought new robots some years ago. Theses ended up sitting in a corner because nobody really worked through the challenges. So they spent $100k or more and abondened the robots.


Here is the video of our OLD robot in action. Some will appreciate the programming which went into it. This first program and we improved since for eefficiency and stability.

Feedback very much appreciated. We will definately make robotics a big part of our fabrication process and we want to learn as much as we can. I am sure there is a lot more we can improve. Thanks to this board btw which helped A LOT.

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