.... 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
usually as you must be already aware the robot and the controller go together.
Well in your case finding the controllers will be a very very herculean task.
I would recommend your customer to either sell these robots to some auction house or ripdown and find customers for motors and reducers.
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
Hello friends:
Many people are off late buying used robots and i thought it will be useful for used robot buyers as a reference.
[move]
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
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.
Edit from Werner Hampel
I have summarized the most important points of this thread in this article.
I thought that as a safety requirement it was important to have a EMG on the TP.
and the EMG is usually hardwired.
How would they ever have a EMG signal in the remote mode? 
do they have EMG for the satellites from the earth? a similar technology may be applicable?
I am guessing that it means
User frame and Tool frame
Is this license fee restricted to the USA or it is applicable whereever on this globe.
I am sure that most of you will agree that IO commenting in FANUC robots can get very painful... more so if you many IOs and multiple robots are to be prepared.
I am currently experiencing a similar situation. My questions are:
1: Is there a way to carry out all the IO commenting on a PC using a text editor or any other means (without roboguide)?
2: Is there an way of copying the IO comments from one input to an other one? (none so far as I am aware!)
ofcourse I know how to copy the same IO comments from one robot to an other one. but this is of little help to me.
Thanks
Also I forgot to mention a hint.. the "C" in the motion instruction always comes with the mid point of your arc.
Hello Rob;
It is actually quite simple after you understand it once. see the following attachment for better understanding.
Good luck 
