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630 - Repower
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<blockquote data-quote="peebeeaitch" data-source="post: 78486" data-attributes="member: 8318"><p>The cuts are incredible - not to start a firestorm here, but even HD Plasma does not even come close.</p><p>The thickest cut is really 25mm - I have heard of slightly thicker cuts, but you won't easily find a supplier that would be prepared (or able) to do this. Please note that this is mild steel. In aluminium the cut is a lot thinner and stainless even less.</p><p>Here is the cut on a 20mm piece of mild steel:</p><p><img src="http://www.thesouthpole.co.za/bobcat/BloodSweatAndTears/2014-09-18_01.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>(At the top of the picture is the back - notice how little dross there is)</p><p><img src="http://www.thesouthpole.co.za/bobcat/BloodSweatAndTears/2014-09-18_02.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>(Bottom of picture is top of steel)</p><p><img src="http://www.thesouthpole.co.za/bobcat/BloodSweatAndTears/2014-09-18_03.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>And the above picture is the width that was cut without any distortion.</p><p>The minimum round (not ugly, or oblong, or "looks like a hole but isn't") hole diameter on a Trumpf machine is around 0.6x material thickness (so 12mm on a 20mm plate). Most job shops won't cut this though as the cost for this type of cutting is very high. Instead they'll mark the steel with an etched cross (which is pretty pathetic actually) and will cut any hole that is material thickness or more in diameter.</p><p>A <u>serious</u> word of caution to anyone that wants something laser cut: do not expect to get sharp corners. The reason is that the machine is moving full speed along, say, the X axis. Now the program calls for a perpendicular cut along the Y. When the machine gets to the corner, it needs to stop moving in X and simultaneously accelerate in Y. The result is that the laser beam dwells at the corner for a split second, and that split second is enough to cause a horrible burn mark there. Apparently dermatological lasers output around 1W of laser energy, an industrial laser is 3-7kW so you get an idea of the power of the things. The result is that most software makes a small radius at a sharp corner that is dependent on material thickness:</p><p><img src="http://www.thesouthpole.co.za/bobcat/BloodSweatAndTears/2014-09-18_04.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>(This was a piece of scrap hence the skeleton cut at the top right, but the auto radius can be seen on the inside corner).</p><p>I think I have quite a comprehensive knowledge of these machines so if anyone wants some help with designs, give me a PM and I'll see if I can help out.</p></blockquote><p></p>
[QUOTE="peebeeaitch, post: 78486, member: 8318"] The cuts are incredible - not to start a firestorm here, but even HD Plasma does not even come close. The thickest cut is really 25mm - I have heard of slightly thicker cuts, but you won't easily find a supplier that would be prepared (or able) to do this. Please note that this is mild steel. In aluminium the cut is a lot thinner and stainless even less. Here is the cut on a 20mm piece of mild steel: [IMG]http://www.thesouthpole.co.za/bobcat/BloodSweatAndTears/2014-09-18_01.jpg[/IMG] (At the top of the picture is the back - notice how little dross there is) [IMG]http://www.thesouthpole.co.za/bobcat/BloodSweatAndTears/2014-09-18_02.jpg[/IMG] (Bottom of picture is top of steel) [IMG]http://www.thesouthpole.co.za/bobcat/BloodSweatAndTears/2014-09-18_03.jpg[/IMG] And the above picture is the width that was cut without any distortion. The minimum round (not ugly, or oblong, or “looks like a hole but isn't”) hole diameter on a Trumpf machine is around 0.6x material thickness (so 12mm on a 20mm plate). Most job shops won't cut this though as the cost for this type of cutting is very high. Instead they'll mark the steel with an etched cross (which is pretty pathetic actually) and will cut any hole that is material thickness or more in diameter. A [U]serious[/U] word of caution to anyone that wants something laser cut: do not expect to get sharp corners. The reason is that the machine is moving full speed along, say, the X axis. Now the program calls for a perpendicular cut along the Y. When the machine gets to the corner, it needs to stop moving in X and simultaneously accelerate in Y. The result is that the laser beam dwells at the corner for a split second, and that split second is enough to cause a horrible burn mark there. Apparently dermatological lasers output around 1W of laser energy, an industrial laser is 3-7kW so you get an idea of the power of the things. The result is that most software makes a small radius at a sharp corner that is dependent on material thickness: [IMG]http://www.thesouthpole.co.za/bobcat/BloodSweatAndTears/2014-09-18_04.jpg[/IMG] (This was a piece of scrap hence the skeleton cut at the top right, but the auto radius can be seen on the inside corner). I think I have quite a comprehensive knowledge of these machines so if anyone wants some help with designs, give me a PM and I'll see if I can help out. [/QUOTE]
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