Hey Everyone,
We have an Essilor Kappa (about 4 years old) and we are having major axis issues with it. We cut around 60-80 jobs per day on this edger and lately it has been costing us a fortune in redos.
Does anyone have any similar issues with the machine? We are looking into purchasing something new very soon, but in the meantime I'd really like to stop the bleeding.
Thanks,
CG
Are the axis problems all the same degree off? Only on hydo lenses? More info please.
We cut around 60-80 jobs per day ..............
70 jobs a day for 5 days a week translates into 18,200 jobs a year which would be 36,400 lenses a year multiplied by 4years = 145,600 lenses.Originally Posted by fcvc
Maybe the machine has some play in the axle that turns the lens. Maybe you should consult a mechanical lens edger specialist like Leo Hadley and find out how you can make the baby turn out on axis lenses for another while.
Here it is:
www.patternless.com
Thanks Chris..
Not the same degree of axis all the time, and not only on Hydrophobic (which was my thought as well).
I pulled the operator and lab supervisor into my office last week and asked them to figure it out.
They did a test. 2 plano lenses traced from the same frame, one came out off axis, one was perfect. This seems to be consistent. We can cut a job and have it be off axis by 6-10 degrees. Redo it and cut it again and it will be bang on.
I definitely think it's a problem with the edger or tracer, but I was wondering if anyone has had similar issues.
As I mentioned we are looking into a new machine, but I don't want to give up on the Kappa as a viable backup. Perhaps it is time for a qualified tech to look at it.
Did you use the same tracing on your samples or did you re-trace for each batch? If different from a re-trace, the tracer may be the problem. Sounds software related and not mechanical.
Thanks for the recommendation Chris!
It sounds like that rotation plate could be loose on the left side. There is a magnetic sensor there that could be getting a wrong reading if the plate is loose.
Do any of these breakages have anything in common?
Material, frame size etc...etc....
Thanks Leo...I actually just sent you an email. I'll do more investigation as to the similarities between jobs, but honestly from what I have seen it's very sporadic in nature, except that it seems to be the costly lenses that have to be redone:(
Of course, it always is.
Just answered your email.......
Will you be participating in the great Canadian migration to Florida this year? Maybe you could pack the edger and come on down :D
I am betting your rotation sensor plate is loose. Check the two screws holding it in place.
Here is some more information for those interested parties.
I just spoke with the lab manager and Edging technician and they both seem to feel that the problem is not likely due to a mechanical issue. If there was a mechanical problem then it would be more evident in all jobs and not just some.
As a test, the lab manager cut two square lenses from a former he made and one came out off axis by over 10 degrees while the second one was only off by 2 degrees. The problem appears to be more right eye related than left.
The lab supervisor is leaning towards an internal electrical or software issue (or operator fault).
FYI: We do not have the machine connected to a laboratory software program.
A loose rotation sensor plate will cause random axis issues especially in one eye only. Your lab manager may very well be right but it is highly possible that tightening the screws in question will solve the problem. If its loose, what your describing makes perfect sense.
Leo knows what he talks about. This has been my exact experiece.
Realign and Tighten the sensor. If it still doesn't work, replace the sensor.
Just for my knowledge, where is this sensor located??
left side. At the top of the jack screw. It's a metal plate with a notch in it and the sensor is at the top.
Excellent thread. We have 6 Kappas and battle twists from time to time. It is an expensive and mind numbing problem. I am amazed that you get 60 to 80 jobs per day! How long are you running the machine?
Adam
I will definitely check out that sensor. For further reference is it on the edger or the tracer?
Thanks.
As for the 60-80 jobs...We have an edging technician with 14 years experience. It's both good and bad. While he can crank out work like no other, he doesn't use all the machines features. For example, he still hand feathers to save time. Put another job on, finish the last by hand.
Lab Supervisor just checked the sensor and says it was secured tightly.
I guess it still could be the sensor itself, although he thinks it's something else.
:hammer:
Yes. the sensor costs less than ONE pair of progressives w/ AR. Just get it. It's a 10 minute install.
He or she is running it right, most high production labs do it this way. As Marc said, get a new senser.
The lab manager had the machine about yesterday (both tracer and edger). They had some jobs that were coming out excellent, especially with regards to PD and heights, but this morning, Axis is still way off.
I guess there are still some questions as to whether or not it could be the operator, but I can't see a 14 year veteran suddenly developing a case of axis-itis
Ordering a new sensor today.
Thanks everyone,
CG
Has the operater had an eye exam lately??I guess there are still some questions as to whether or not it could be the operator, but I can't see a 14 year veteran suddenly developing a case of axis-itis
Thanks everyone,
CG
Presbyopia!:bbg:
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