a couple more lithos

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a couple more lithos

Postby pops1964 » Wed Jun 25, 2014 12:02 am

more litho's
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IMAG0585.jpg
IMAG0589.jpg
photo 3-20140305-152802.jpg
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Re: a couple more lithos

Postby tonydude919 » Wed Jun 25, 2014 1:52 am

Hey pops,

They are excellent ! What bit you using and the settings? I've done dozens of lithos myself, just wondering if your using the same as me.

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Re: a couple more lithos

Postby pops1964 » Wed Jun 25, 2014 6:15 pm

Tony I use a 1/8" ball nose at 21,000 rpm
pass depth - .0625
feed rate - 50.
plunge rate - 20. for roughing pass


1/16th" tapered ball nose at 21,000 rpm
pass depth .2
feed rate - 100.
plunge rate - 30. for finish pass
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Re: a couple more lithos

Postby pops1964 » Wed Jul 02, 2014 12:18 pm

Hey Tony I got to see your work on facebook and it looks great , looks like you are shooting for the same quality as I am with the litho's. I'am reaaly interested in the acrylic carving , I want to try it I was told for the 3-D you need aspire but I'am curious if i can do signs and logos using v-carve it seems like it would work. if you would like to get into more detail about litho's let me know. I'am curious about your settings and run time I've been told my run times are a waste but I won't sacrifice my quality to safe on a electric bill . thanks pops
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Re: a couple more lithos

Postby tonydude919 » Thu Jul 03, 2014 1:29 am

I just use a .0625 ball nose bit for my lithos. 10% stepover

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Re: a couple more lithos

Postby Xxray » Thu Jul 03, 2014 6:10 am

Pops, your 1% stepover is the cause of the excessive cut times.
I'm all for detail, I really do not think you would notice any difference at 5 to 10% and you'd cut the time in by 50-75%.
Its not all about electricity, you got extra wear and tear on the machine and bits, and also lost productivity tying up the machine half a day doing 1 8x10 when you could do 4 in the same time frame.
But by all means, continue on with the 1% if thats what you have in mind to do.
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Re: a couple more lithos

Postby pops1964 » Thu Jul 03, 2014 7:59 pm

Xray I see the point your making , I went back and looked at some files of different litho's , and were all my #'s were at. The way I was told to do these was to set line spacing so you end up with .003 -.004 on you distance between lines. And one thing I have found out about getting your numbers is how good the picture is and how well you can edit it. I'am going to run a couple this weekend and play with the numbers and see how the look . No offence to you thanks , pops
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Re: a couple more lithos

Postby Xxray » Thu Jul 03, 2014 8:16 pm

I am almost impossible to offend, just offering advice.
As you say, play around with settings and compare, if I was a betting man [which I am] I'd bet there is no visual difference at all between 1% and 8%, and you'd save substantial time and machine wear.
Too, if you ever get into selling these vs personal use, you are for sure going to want to trim down cutting time, time = $$ in that case.
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Re: a couple more lithos

Postby pops1964 » Thu Jul 03, 2014 9:42 pm

just curious in michigan because of economy they sell from 140.00 - 200.00 and thats anything from 6-8 up to 10x10 pine frames is that average?
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Re: a couple more lithos

Postby Xxray » Thu Jul 03, 2014 10:25 pm

Hard to say, I guess they are worth whatever you can get for them.
Haven't sold many as I just started lithos a few weeks ago, I sold the one pictured below for $125, about 9x12" mdf frame with remote LED control.
Might perhaps have got more, for sure less ,,, But it only took 2.5 hours to cut, maybe $25 in materials so it was worthwhile to me and the person who got is was thrilled.
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Re: a couple more lithos

Postby pops1964 » Fri Jul 04, 2014 1:09 am

Xray nice job . I've been curious the size of the photo you use makes a differents in the quality I find smaller photos by the time you edit and enlarge ruins quality. bigger picts for bigger liths smaller and older keep down sized . Or maybe I need a better photo edit program.
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Re: a couple more lithos

Postby Xxray » Fri Jul 04, 2014 6:52 pm

No doubt the better resolution and quality the pic, the better the result will be.
My 1st attempt at a litho was with poorly exposed subjects, after 3 failed attempts I gave up.
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