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Lab talk, the good, the bad, and the ugly
Dental-CAM
need to buy mill and oven advice
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<blockquote data-quote="eyeloveteeth" data-source="post: 143707" data-attributes="member: 6624"><p>We mill Zirconia all day long in our DWX-50's (5 of them) - practically 24 hours a day. 2 are nearly at the 1 year mark, and other than wearing tools, it's been a walk in the park. </p><p></p><p>We tested the VHF 4K4 alongside the Roland DWX50 for about 4 weeks before we made a decision.</p><p></p><p>First things first, the clamp...WHAT the heck...it broke every rim of every material (other than PMMA) - it became such a problem we even had VHF on the phone. We first thought, okay, maybe we are tightening the clamp too much....so then we kept on loosening the torque....too the point of the puck eventually dropping when it milled. (Wasted many pucks - about 14 various materials, luckily our supplier gave us all of them for free). </p><p></p><p>Eventually we thought we had it down, and proceeded to mill a full puck in stages. Well, apparently it is not a good idea to mill from the clamp side out...because when we tried milling on the opposite side of the clamp with all 80% of the puck used...it crumbled on us in the mill. </p><p></p><p>Third week into the test, the contact plate already had to be changed. (Keep in mind this was a brand new unit straight from the manufacturer). </p><p></p><p>By the fourth week, we made our decision, as everything we did in the VHF, we also did in the Roland - and it passed with flying colors. </p><p></p><p>Another huge draw back was the VHF CAM software, we were not fans, and REALLY didn't like the fact that VHF locked the software and seemed insulted that I wanted to change anything...</p><p></p><p>Oh, and the little plastic clips that hold the burs in place snapped more than a few times, and also got stuck in the spindle. - these were OEM burs and collete/spindle maintenance was done.</p><p></p><p>Lastly, it was a PITA to clean these things out. It was so cramped....we enjoy the open milling space of the Roland alot more. </p><p></p><p>Finally, milling a screw-retained bridge (which we do quite often) - was the final nail in the coffin for us when the VHF machine just didn't perform to what we wanted.</p><p></p><p></p><p>Now, I am not saying the mini mill/master mill/Glidewell Mill/VHF mill is bad. In fact we know many labs that have bought many of them.... unfortunately for us, they just didn't work out. </p><p></p><p>We are very happy with the Roland, and also like Sum3D. Not to mention, our reseller has bent over backwards for us. </p><p></p><p></p><p></p><p></p><p>Jaegar spindles are great, but what's the point of offering the same warranty as roland? you should offer a 4 year warranty if you are so confident as a reseller. just saying. </p><p></p><p></p><p>also...red herring much? VHF 4K4 and HAAS mill do not belong in the same sentence. EVER. </p><p></p><p>ex. </p><p></p><p>MICKEY MOUSE :: VHF/Roland</p><p></p><p>Gundam/Extreme Glad R1 WoW character :: Haas.</p></blockquote><p></p>
[QUOTE="eyeloveteeth, post: 143707, member: 6624"] We mill Zirconia all day long in our DWX-50's (5 of them) - practically 24 hours a day. 2 are nearly at the 1 year mark, and other than wearing tools, it's been a walk in the park. We tested the VHF 4K4 alongside the Roland DWX50 for about 4 weeks before we made a decision. First things first, the clamp...WHAT the heck...it broke every rim of every material (other than PMMA) - it became such a problem we even had VHF on the phone. We first thought, okay, maybe we are tightening the clamp too much....so then we kept on loosening the torque....too the point of the puck eventually dropping when it milled. (Wasted many pucks - about 14 various materials, luckily our supplier gave us all of them for free). Eventually we thought we had it down, and proceeded to mill a full puck in stages. Well, apparently it is not a good idea to mill from the clamp side out...because when we tried milling on the opposite side of the clamp with all 80% of the puck used...it crumbled on us in the mill. Third week into the test, the contact plate already had to be changed. (Keep in mind this was a brand new unit straight from the manufacturer). By the fourth week, we made our decision, as everything we did in the VHF, we also did in the Roland - and it passed with flying colors. Another huge draw back was the VHF CAM software, we were not fans, and REALLY didn't like the fact that VHF locked the software and seemed insulted that I wanted to change anything... Oh, and the little plastic clips that hold the burs in place snapped more than a few times, and also got stuck in the spindle. - these were OEM burs and collete/spindle maintenance was done. Lastly, it was a PITA to clean these things out. It was so cramped....we enjoy the open milling space of the Roland alot more. Finally, milling a screw-retained bridge (which we do quite often) - was the final nail in the coffin for us when the VHF machine just didn't perform to what we wanted. Now, I am not saying the mini mill/master mill/Glidewell Mill/VHF mill is bad. In fact we know many labs that have bought many of them.... unfortunately for us, they just didn't work out. We are very happy with the Roland, and also like Sum3D. Not to mention, our reseller has bent over backwards for us. Jaegar spindles are great, but what's the point of offering the same warranty as roland? you should offer a 4 year warranty if you are so confident as a reseller. just saying. also...red herring much? VHF 4K4 and HAAS mill do not belong in the same sentence. EVER. ex. MICKEY MOUSE :: VHF/Roland Gundam/Extreme Glad R1 WoW character :: Haas. [/QUOTE]
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need to buy mill and oven advice
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