I have a question for anyone out there using a Kappa Edger concerning grooved rimless.
Many of my jobs are coming back fractured internally. Tech support says it could be a dull wheel. I ran the white stone on it but haven't done another job with it yet. I suppose i should order a new one but @ $200.00 for a 25 mm grooving wheel I was wondering if there is another resource or just pay up cause it will waste that much in re-do's and time.
Get a new wheel and switch to Trivex. End of problem.
I agree with both reccomendations, plus with Trivex your pt.'s get the added benefit of improved optics.
another Eyeguy.
Is it all grooved lenses or a particular type? Some sandwich lenses can have problems if you groove across the layers.
More expensive and not as many options available. Also thicker than poly. It is optically better and lighter. Does the Shamir Autograph II Variable come in Trivex?
I ordered a new wheel after calling a guy whom Fezz referred me to. I guess I will just eat the re-dos until then. Some of which are out of warranty.:(
yes!!!Originally Posted by eye.guy
Don't your patients deserve the best??
Maybe you need to start factoring in the cost of eating poly re-dos. And what's the cost of losing a customer because the glasses you sold them fell apart?More expensive and not as many options available. Also thicker than poly. It is optically better and lighter. Does the Shamir Autograph II Variable come in Trivex?
I ordered a new wheel after calling a guy whom Fezz referred me to. I guess I will just eat the re-dos until then. Some of which are out of warranty
RT
Yeah, but they don't want to pay for it.
FWIW-JG has an excellent price on stock trivex with ar.
Last edited by KStraker; 12-11-2009 at 11:14 AM.
Trivex isn't that much more than Poly. I have the Kappa Edger, and for some reason it doesn't want to cut Trivex. Otherwise, I'd use that over Poly every time.
To accomodate for the cost of replacing equipment and eating redos, wouldn't it be acceptable to raise the price of the poly lenses, even minimally? If the prices have to go up, they might as well get Trivex. Just let the patient know, "this is what we use for grooved lenses." I've stopped doing CR-39 in string-mount because of chipping, and that's what I tell my patients. I'm giving them a better quality material, and it's in their best interest in the long run to have a pair of glasses that won't look like crap after six months. If they don't want to pay for it, and elect to get plastic, they've been warned that the lenses can chip. Then it's on them.
It's our job to provide our patients a means to the best vision they can have. Having said that, there's lots of options, and it needs to be worked out between the optician and the paitent what's going to work best. We can't dip into their wallets and say, "you're gettting this." They have to know the choices, but we need to educate them and steer them towards the right choice. If they don't want to pay for something that's going to help them, we can't make them.
Let us know if the new wheel fixes your problem!
It's nice to be important, but it's more important to be nice.
All true.
Only a small fraction of people will actually see a difference in the optics, IMO. And it's not necessarily lighter, given the fact that it won't be thinner except in lower powers.
I wouldn't consider it the best. The optics aren't as good as crown glass or cr39, it's thicker than everything but cr39 and glass, and it's not as scratch resistant as cr39 or glass. I'm not saying that cr or glass are better either, but each material has its own inherent benefits and disadvantages which should be considered on a case by case basis.
Just my $.02 :cheers:
Trixex/Phoenix also yellows horribly which poly never has, at least not for me.
I would also suggest a new grooving wheel as we've never had any ongoing trouble with poly cracking when it's cut well - whether done in-house, or through a myriad of labs nationwide over the years. You'll always get the odd job or perhaps even a short run of jobs with problems, but that is true in just about any material in my experience.
Best of luck to you whatever you decide to do! :cheers::cheers:
I know it's on Shamir's website, but that chart is very out of date. The Rx ranges have expanded greatly; they've also added a few materials to the chart.
I used a Kappa several years ago, and always found it reliable. I think our grooving wheel lasted ~4 years before we had to replace it, and that was due to the amount of swarf it left in the groove. There should be a setting in it somewhere that controls how fast the lens is brough into the wheel. Also, what depth are you grooving at? That can cause it as well. Or maybe you got a bad batch of Poly.
Huh? You're supposed to replace those? Gee, ours has lasted probably 20 years! And we only have problems with one out of every two jobs. Wonder if the old wheel could be part of the problem? :hammer::hammer::hammer:
This is an incredibly old thread however for those who are having issues related to micro fractures on grooved poly.... take your wheel off the machine and clean it up with a stone by hand.
Reinstall wheel and it should be fixed. no starring with or without edge polish. The only thing is if the wheel has a lot of wear from say 11000 cuts...get a new grooving wheel.
and the starring issue is gone!
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