Is it possible to mix a very firm acculap pitch with a very soft to get something in the middle around 64?...
15515
waldo kitty
wkitty42
Mar 3, 2010 12:30 am
... should be... as long as you get the ratios correct ;)...
15516
Mark Holm
holmmd17
Mar 3, 2010 1:18 am
This doesn't direct address your question, but it still may be helpful. http://www.atmsite.org/contrib/Shrader/Acculap/acculap.html -- Mark Holm ...
15517
Louis
faintfuzzies1
Mar 5, 2010 12:14 am
I was on 5 micron.all most done ..mirror was geting very very baby smooth and I just got a huge deep scratch from a tile that i guess chipped off the tile...
15518
Jerry
atc322asd
Mar 5, 2010 4:54 am
Hello Lou, "Huge and deep" can be in the eye of the beholder. The description implies something much larger than the present grit size. Since the grind time...
15519
calvin65@...
bigdob20
Mar 5, 2010 1:01 pm
Lou, Jerry seems logical. If you can remember what the pits looked like from each grit size, it will help. I have not used a tile tool before so have some...
15520
Louis
faintfuzzies1
Mar 5, 2010 1:22 pm
I found out he scratch came for a small piece of tile that for some reason flaked off the tool.. yea i will start over agian at 320 and see how it goes for any...
15521
ghb959
Mar 5, 2010 2:14 pm
Hi; I never let the tile go below a 16 of a inch thick. I clean the top of the tool with soap and a brush, and wipe the top of the tool down with alcohol. And...
15522
Mark Whitaker
tnut55
Mar 5, 2010 2:31 pm
The depth of the scratch may be misleading but you can sprinkle dry grains of a particular size on the mirror and compare the scratch to the grain size under a...
15523
Berthold Hamburger
beastro.geo
Mar 5, 2010 2:36 pm
Hi, Jerry gives good advice. You usually “save” time by getting back a few more grits. The rule is to find out that the scratch/pit is deeper than ...
15524
Vladimir Galogaza
vgalogaza
Mar 5, 2010 2:45 pm
Berthold, ... How do you explain this? It looks like in "embedded"; case the dental stone between tiles comes off while in other case glue prevents it. Or is...
15525
Louis
faintfuzzies1
Mar 5, 2010 3:24 pm
Th width of the scratch is a 1/16th wide and i cab feel the depth with my finger nail......
15526
Berthold Hamburger
beastro.geo
Mar 5, 2010 3:41 pm
Vladimir, I think there are several factors at play. 1. Plaster particles come off and while the plaster is supposedly much softer than either glass or...
15527
Berthold Hamburger
beastro.geo
Mar 5, 2010 3:54 pm
Louis, I’d say it is time for #180 or 200. Berthold -- Berthold Hamburger - Cellist/Spain Email: behambu@... http://www.artinso.com ...
15528
Mark Whitaker
tnut55
Mar 5, 2010 3:59 pm
That's a pretty wide scratch. It sounds like you may have to go pretty far back, maybe to 60 or 80 grit. That's unfortunate but it does happen to all of us...
15529
"Mr. Wizard!"
artbianconi...
Mar 5, 2010 4:35 pm
With all the rancor over the environment and the noise surrounding lead in gasoline, paint, pipes and elsewhere, I suspected that I might find it tough finding...
15530
waldo kitty
wkitty42
Mar 5, 2010 5:23 pm
... don't forget about vehicle tire weights... most local tire shops simply pull the old ones off and thrown them on the ground for later sweeping up......
15531
Jerry
atc322asd
Mar 5, 2010 6:19 pm
That sounds consistent with a flake off of a tile galling the surface. I think 320 will be the right grit for the job. If you see that it is not going away...
15532
Jerry Hillman
truckeratm...
Mar 5, 2010 6:23 pm
I made the counterweight for my 10" dob by filling an aluminum coke can with melted lead. I needed the counterweight to offset the imbalance caused by swithing...
15533
Vladimir Galogaza
vgalogaza
Mar 5, 2010 6:29 pm
... If it will ever happen, there is plenty of depleted uranium laying around which can be used with huge counterweight volume reduction. Regards Vladimir....
15534
Mark Whitaker
tnut55
Mar 5, 2010 7:10 pm
I made a similar 10# weight by pouring lead into a metal coffee can with a pipe sticking vertically in the center. It was supported between two other...
15535
Louis
faintfuzzies1
Mar 5, 2010 10:04 pm
Thi sis my 3rd mirror and i understnad that most scratch dont mean anything at the eyepiece.. I just want to be proud of what i make and a scrath will make me...
15536
Jerry
atc322asd
Mar 5, 2010 10:49 pm
Ahh, 3rd mirror... nothing short of perfect acceptable now. :-)...
15537
tucstargzr
Mar 7, 2010 2:18 am
They've been using DU as counterweights in Aircraft since the last millenium. Either one might be better if you molded them into epoxy so you don;t need to...
15538
calvin65@...
bigdob20
Mar 7, 2010 4:05 am
Remember, U238 is an alpha emitter and radon is a product. I do not mind working with the stuff; but in my home? Phill On Mar 6, 2010, tucstargzr...
15539
Ali Khan
ak6666666
Mar 7, 2010 5:50 am
A single click on the GM counter will send me running for shelter. Its irresponsible I think to use DU in aircrafts. What if ....? Then my cup of tea will have...
15540
Ali Khan
ak6666666
Mar 7, 2010 12:48 pm
Hi. The following is off topic but I still want to post it. Thanks M. Ali sent sms and even called to say how much he enjoyed the Moon which was near a red...
15541
trulyyours05
Mar 7, 2010 9:31 pm
Ali, If your GM counter doesn't click randomly it must be turned off or no good. Al...
15542
A
ak6666666
Mar 8, 2010 3:47 am
LOL I knew someone would notice my mistake. Ofcourse there is that constant cosmic background radiation. I dont have a GM tube but wish to have one or make...
15543
Vladimir Galogaza
vgalogaza
Mar 8, 2010 9:49 am
Ali, ... Don't be so optimistic. There is much more of it from constant terrestrial sources like radon, but also lot of it produced by us, intelligent species....
