I'm trying to electorchemically etch a maker's mark. I have a stencil of my name about .75" wide and just under .2" high - a very standard font in standard size that hundreds of people use as maker's marks. I clean the blade, apply the mystery "etching solution" to the electrode pad and then the place the pad over the stencil clamping it in place with an F clamp, the opposing electrode is clamped to the tang. The unit is plugged in and I've let it run from 5 minutes to 3 hours but it still doesn't accomplish a full, deep etch of all the letters. The result is that the black oxides are removed from parts of some letters when I clean up the mark after etching. In other words many parts of the etch remain shallow.
I've tried re-applying the solution after an hour and then again in another hour because it evaporates. If I apply it too liberally it just either soaks the tape or runs under the tape and ends up all over the knife, etching areas not intended. In fact, in addition to taping down all sides of the stencil I've started covering about 2" on ether side of the stamp site, above and below it and the back side of the knife with dykem prior to ecthing as a resist in case excess solution runs wild.
Thanks!
Steve
Is your unit a "personalizer" style machine?
Home made?
Have you witnessed this machine work by others using the same technique?
Are your stencils relatively clean?
Is the ground clamp making good contact? (can you feel heat in the blade after the etch?)
This the kind of thing I would have to know more to be of any help.
I'm with Lin... need that information in order to help.
Something in your post caught my attention....
I've let it run from 5 minutes to 3 hours but it still doesn't accomplish a full, deep etch of all the letters.
That gives me the impression that you're placing the "pad" on the stencil and leaving it? If so, that just not the correct method to use. The etching pad should be "dabbed" on and off of the stencil. Every time the pad makes contact withe the stencil/blade, it creates gasses, that must be allowed to escape, otherwise the etcher just doesn't work.
I own/use a Personalizer Plus, which has both AC and DC, and adjustable current in either setting. The DC setting is what cuts depth, and during cutting the depth of the mark, atomized steel is "sucked" up by the etching pad (that's why the etching pad looks black/dirty when this step is done). On my machine, the current is generally set at 3-4 on the dial, depending on the size/thickness of the blade being etched. I place the pad (dampened with etch solution) on the stencil, count to 10, lift the pad to allow the gasses to escape, and repeat for a total of 8-10 times.
I then switch the machine to the AC setting (this will redeposit the atomized steel into the mark, and is what gives the black/dark color to the mark), with the current dial set at 4, I then repeat the steps I did with the DC setting..... pad on the stencil, count to 10, lift for a few seconds, then repeat for the total of 8-10 times.
Etching a mark on a blade is as much an art, as it is science. One thing I do that has made a huge difference for me.... once the stencil is taped down, I spritz it with windex.... it gives me a much cleaner looking mark, and keeps the edges of the letters from bleeding.
Ed Caffrey, ABS MS
"The Montana Bladesmith"
www.CaffreyKnives.net
|quoted:
I'm with Lin... need that information in order to help.
Something in your post caught my attention....
That gives me the impression that you're placing the "pad" on the stencil and leaving it? If so, that just not the correct method to use. The etching pad should be "dabbed" on and off of the stencil. Every time the pad makes contact withe the stencil/blade, it creates gasses, that must be allowed to escape, otherwise the etcher just doesn't work.
I own/use a Personalizer Plus, which has both AC and DC, and adjustable current in either setting. The DC setting is what cuts depth, and during cutting the depth of the mark, atomized steel is "sucked" up by the etching pad (that's why the etching pad looks black/dirty when this step is done). On my machine, the current is generally set at 3-4 on the dial, depending on the size/thickness of the blade being etched. I place the pad (dampened with etch solution) on the stencil, count to 10, lift the pad to allow the gasses to escape, and repeat for a total of 8-10 times.
I then switch the machine to the AC setting (this will redeposit the atomized steel into the mark, and is what gives the black/dark color to the mark), with the current dial set at 4, I then repeat the steps I did with the DC setting..... pad on the stencil, count to 10, lift for a few seconds, then repeat for the total of 8-10 times.
Etching a mark on a blade is as much an art, as it is science. One thing I do that has made a huge difference for me.... once the stencil is taped down, I spritz it with windex.... it gives me a much cleaner looking mark, and keeps the edges of the letters from bleeding.
The unit I have is a $49 AC unit from lectroetch. The instructions indicate dabbing should be used as well but that seems to yield superficial results which is why I've tried longer contact periods. It sounds like I may need a DC unit. Thanks!
I've owned/used various levels of etchers over my career. It sounds like you have the same type/model I started out with, and I got the same results....just not good. I think I paid about $200 or so for the personalizer plus, but until I got it, at best, I had inconsistent results.
Personally, I think that both the AC/DC and the variable current is a must....it's the only etcher that I've ever been able to get good, consistent results with.
It took me a while, and some help from other Knifemakers, before I found the technique that works for me, but now it seems pretty easy.
All that being said, the stencils you use have a big impact too. My suggestion is Blue Lightening stencils.
Ed Caffrey, ABS MS
"The Montana Bladesmith"
www.CaffreyKnives.net
|quoted:
I've owned/used various levels of etchers over my career. It sounds like you have the same type/model I started out with, and I got the same results....just not good. I think I paid about $200 or so for the personalizer plus, but until I got it, at best, I had inconsistent results.
Personally, I think that both the AC/DC and the variable current is a must....it's the only etcher that I've ever been able to get good, consistent results with.
It took me a while, and some help from other Knifemakers, before I found the technique that works for me, but now it seems pretty easy.
All that being said, the stencils you use have a big impact too. My suggestion is Blue Lightening stencils.
Thanks, Ed.
PS I'm lucky enough to own one of your beautiful knives
I do 20 four second cycles. Ed does 8 ten second cycles. Same amount of time! But the key point is letting built-up gases escape.
Karl B. Andersen
Journeyman Smith