Granite vs Marble ? Settings etc. - Engraving Etc. Forum

<body> <h1>Full Version: <a href="https://www.engravingetc.org:443/archive/index.php?webtag=EE&msg=6696.1">Granite vs Marble ? Settings etc.</a></h1><a name="a6696_1"></a><p><b>From: Larry B (PALMETTO)</b> [<a href="lmessages.php?webtag=EE&msg=6696.1">#1</a>]<br /> 19 Apr 2007<br /><b>To: ALL</b></p> How does granite engrave opposed to marble? Are the settings about the same or different? I got in some beautiful absolutely black granite today from Lasersketch, but I don't have any settings and have never done any before. Recommendations please. Thanks <hr /><a name="a6696_2"></a><p><b>From: MIKEY (JADEPUTTERS)</b> [<a href="lmessages.php?webtag=EE&msg=6696.2">#2</a>]<br /> 19 Apr 2007<br /><b>To: Larry B (PALMETTO)</b> [<a href="lmessages.php?webtag=EE&msg=6696.1">#1</a>] 19 Apr 2007</p> I use 80 speed 34 power with my 24TT 45 watt <hr /><a name="a6696_3"></a><p><b>From: Harvey only (HARVEY-ONLY)</b> [<a href="lmessages.php?webtag=EE&msg=6696.3">#3</a>]<br /> 20 Apr 2007<br /><b>To: MIKEY (JADEPUTTERS)</b> [<a href="lmessages.php?webtag=EE&msg=6696.2">#2</a>] 20 Apr 2007</p> <p>A comparison between the settings for marble and granite might help him more.</p> <p>(I have never done granite so I cannot help.)</p> <hr /><a name="a6696_4"></a><p><b>From: UncleSteve</b> [<a href="lmessages.php?webtag=EE&msg=6696.4">#4</a>]<br /> 20 Apr 2007<br /><b>To: Harvey only (HARVEY-ONLY)</b> [<a href="lmessages.php?webtag=EE&msg=6696.3">#3</a>] 20 Apr 2007</p> Now THAT is a surprise! 8-O <br /> <br /> You said EVERYONE took you for granite! (devil) <hr /><a name="a6696_5"></a><p><b>From: Larry B (PALMETTO)</b> [<a href="lmessages.php?webtag=EE&msg=6696.5">#5</a>]<br /> 20 Apr 2007<br /><b>To: Harvey only (HARVEY-ONLY)</b> [<a href="lmessages.php?webtag=EE&msg=6696.3">#3</a>] 20 Apr 2007</p> WHAT!!!! I thought you were one of our leaders????? No granite huh? Does that mean when I do some I get a promotion? B-) <hr /><a name="a6696_6"></a><p><b>From: Harvey only (HARVEY-ONLY)</b> [<a href="lmessages.php?webtag=EE&msg=6696.6">#6</a>]<br /> 20 Apr 2007<br /><b>To: Larry B (PALMETTO)</b> [<a href="lmessages.php?webtag=EE&msg=6696.5">#5</a>] 20 Apr 2007</p> Sorry, can't come up with a good comeback. :-& <hr /><a name="a6696_7"></a><p><b>From: Larry B (PALMETTO)</b> [<a href="lmessages.php?webtag=EE&msg=6696.7">#7</a>]<br /> 20 Apr 2007<br /><b>To: Harvey only (HARVEY-ONLY)</b> [<a href="lmessages.php?webtag=EE&msg=6696.6">#6</a>] 20 Apr 2007</p> <p>Putting the banter aside for a moment. It appears from the info from here and Sawmill Creek, that the speed/power settings are more or less the opposite of marble. My Epilog sheet recommends 30s/100p at 600dpi for marble, but nothing is given for granite. I have one recommendation from an Epilog 45w user at 100s/40p which would be approximately comparable to mine at 40w.</p> <p>What's the difference? Is the granite softer, absorbs energy differently or what? I assume it still engraves white. I notice Photograv does apparently have a parameter stated as Spectralite brand? Thanks in advance for the info.</p> <hr /><a name="a6696_8"></a><p><b>From: Laser Image (LASER_IMAGE)</b> [<a href="lmessages.php?webtag=EE&msg=6696.8">#8</a>]<br /> 20 Apr 2007<br /><b>To: Larry B (PALMETTO)</b> [<a href="lmessages.php?webtag=EE&msg=6696.7">#7</a>] 21 Apr 2007</p> <p>Granite is actually harder than marble. My best results are using higher speed and lower power on marble, lower speed and higher power on granite. Something like 100%p/10%s for granite and 40%p/ 80%s on marble.</p> <p>Gary</p><hr /><a name="a6696_9"></a><p><b>From: MIKEY (JADEPUTTERS)</b> [<a href="lmessages.php?webtag=EE&msg=6696.9">#9</a>]<br /> 20 Apr 2007<br /><b>To: Harvey only (HARVEY-ONLY)</b> [<a href="lmessages.php?webtag=EE&msg=6696.3">#3</a>] 21 Apr 2007</p> I have never done marble so can only offer what I know. <hr /><a name="a6696_10"></a><p><b>From: Harvey only (HARVEY-ONLY)</b> [<a href="lmessages.php?webtag=EE&msg=6696.10">#10</a>]<br /> 21 Apr 2007<br /><b>To: MIKEY (JADEPUTTERS)</b> [<a href="lmessages.php?webtag=EE&msg=6696.9">#9</a>] 21 Apr 2007</p> And many thanks for that. <hr /><a name="a6696_11"></a><p><b>From: Larry B (PALMETTO)</b> [<a href="lmessages.php?webtag=EE&msg=6696.11">#11</a>]<br /> 21 Apr 2007<br /><b>To: MIKEY (JADEPUTTERS)</b> [<a href="lmessages.php?webtag=EE&msg=6696.2">#2</a>] 21 Apr 2007</p> <p>Mikey;<br /> Thanks, proof's in the results. Your work looks great! I'll try this setting and see what my laser gives me.</p><p class="edit_text">EDITED: 21 Apr 2007 by PALMETTO</p> <hr /><a name="a6696_12"></a><p><b>From: Mikey (MIKE2449)</b> [<a href="lmessages.php?webtag=EE&msg=6696.12">#12</a>]<br /> 23 Apr 2007<br /><b>To: Larry B (PALMETTO)</b> [<a href="lmessages.php?webtag=EE&msg=6696.11">#11</a>] 23 Apr 2007</p> <p>Larry:<br /> Just checking to see if you have worked out the diff between the stones. Granite is an igneous rock (from the earth's core). Generally it is far harder than marble. Marble is a metamorphic rock, originally from the earths surface, pushed below the surface cooked for a couple hundred million years and quarried by man. Both are quarried in different manners. The Italians are the best marble quarriers in the world, Finland is (in my opinion) the world leader for granite. Both stones come out in blocks, weather they are wire cut or drilled and blasted. These blocks vary in size, however, they are about 5' x 5' x 9'. If they are used for tiles (usually 1cm thick) they are processed by a "tile line" machine. This type of machinery takes the block, slices it up, cuts to size, gauges stone and polishes all in one big line. The sizes are typically 12"x12" or 18" x 18". The Italians have really made this process state of the art. If one wants larger pieces, usually they are 2cm, 3cm or 5cm thick. This process is like the old bakery bread cutters. The block is placed under a large frame with spring steel blades. Water with abrasive is applied as the blades are lowered onto the block and slid back and forth just like the old bread cutters. It takes about 8 hours to cut through a block of marble. It takes just under 8 days to cut a block of granite in this method. They have just developed high tensioned diamond wire saws (reciprocal) that has cut this time dramatically I'm told.<br /> If you haven't found out by now, every stone is slightly different. Absolute black granite can and does have a different surface appearance. Sometimes the "fleck" is very, very small--other times it is larger. I have found that the granite with the smallest fleck gives the best image. Lasersketch has come across a very hard absolute black marble. This particular stone has almost a white background when lasered. I use full power with this stone about 35% speed and always 600 dpi. For regular absolute black marble and absolute black granite<br /> I reverse things a bit. I have found that 15% power and 20% speed give me the best image on granite. Also, I use 300 dpi on black granite. I use these settings on absolute black marble as well, only with 600 dpi. A trick I learned here is to use Armorall before you laser. Just apply and wipe off right before you laser the stone. I don't know why this works but am doing some research now. Normally with black marbles (like Negro Marquina) the final polish uses tin oxide and oxalic acid to shine. (We used to use felt pads with lead).<br /> Hope this isn't boring everyone and I'll end it here. Hope this is of help.<br /> Mike</p> <hr /><a name="a6696_13"></a><p><b>From: Stunt Engraver (DGL)</b> [<a href="lmessages.php?webtag=EE&msg=6696.13">#13</a>]<br /> 23 Apr 2007<br /><b>To: Mikey (MIKE2449)</b> [<a href="lmessages.php?webtag=EE&msg=6696.12">#12</a>] 23 Apr 2007</p> Not boring at all Michael.<br /> <br /> Very informative.<br /> <br /> Thank you, <hr /><a name="a6696_14"></a><p><b>From: Larry B (PALMETTO)</b> [<a href="lmessages.php?webtag=EE&msg=6696.14">#14</a>]<br /> 23 Apr 2007<br /><b>To: Mikey (MIKE2449)</b> [<a href="lmessages.php?webtag=EE&msg=6696.12">#12</a>] 24 Apr 2007</p> Thanks Mike. I printed your reply. As you know, I'm still experimenting with this stuff. I haven't engraved any of the granite yet, but I think I am going to take all the advice I have been given and test each one on the granite I have. That will give me a good idea of which works best, at least on this particular stone. Thanks again. <hr /><a name="a6696_15"></a><p><b>From: Mikey (MIKE2449)</b> [<a href="lmessages.php?webtag=EE&msg=6696.15">#15</a>]<br /> 24 Apr 2007<br /><b>To: Larry B (PALMETTO)</b> [<a href="lmessages.php?webtag=EE&msg=6696.14">#14</a>] 25 Apr 2007</p> <p>Larry:<br /> Use every sq in of the stone. Below is a pic of a piece of stone I used to test on--it is black absolute and has since been completely filled.<br /> Good luck.<br /> Mike</p> <hr /><a name="a6696_16"></a><p><b>From: Larry B (PALMETTO)</b> [<a href="lmessages.php?webtag=EE&msg=6696.16">#16</a>]<br /> 25 Apr 2007<br /><b>To: Mikey (MIKE2449)</b> [<a href="lmessages.php?webtag=EE&msg=6696.15">#15</a>] 25 Apr 2007</p> <p>Mike:<br /> I ran one of these big pieces of granite this morning. I put a large photo that I made of some boats on it, 10" x 22". I used a setting of 100 speed-44 power, took 26 minutes. It turned out beautifully. I ran the whole thing, photo, text and all at 300dpi. This setting was recommended by a guy in the Sawmill Creek forum that has an Epilog 40w, same as mine. It worked great. Thanks for all your help and advice, I appreciate it. I'll post a photo when I can get one made.</p><p class="edit_text">EDITED: 25 Apr 2007 by PALMETTO</p> <hr /><h4><a href="lthread_list.php?webtag=EE">Back to thread list</a> | <a href="llogout.php?webtag=EE">Login</a></h4> <h6>© 2024 <a href="http://www.beehiveforum.net/" target="_blank">Project Beehive Forum</a></h6> </body>