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    What printer to buy for RPD

    Discussion in 'Removable' started by Nik@BMDL, Nov 18, 2016.

    1. Nik@BMDL

      Nik@BMDL New Member Full Member

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      Hi , I currently do Removable partial metal frames the good old way and have been waiting to jump into the Disgiral world for a few years now

      I am about to finally take the leap into Cad Cam but have absolutely no clue about what I'm getting myself into except for reading on these forums past experiences of
      Other users . Most info seems to be about personal preference which is fine but I'm more intrested in understanding from the time the file leaves the scanner ( I am set on getting the 3shape d850 or d900 for texture scanning as I see having the pencil marking on the screen would help) to printing and then what's involved to get it to casting stage

      Example
      Printer
      Printer materials
      Expansion settings
      Investment used
      Investment liquid or straight water
      Surface tension breaking ie are you painting the plastic resin with fine investment or spraying debubbliser
      Sprucing individual cases or multiple cases in one ring
      Fitting issues ? Yes or no

      Sorry for so any questions but any help from pole actually doing it is great!
       
    2. JMN
      No Mood

      JMN Christian Member Donator Full Member

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      Greetings Earthling! Welcome!

      I'm curious about the post mill or post print processing as well. I'm guessing surfectant and mix liquids as per the usual method being that the expansion management qualities of the ratio are at least as much to provide a properly oversized cavity for the metal blend's shrink froom cooling as anything else. Most of our metals are non-eutetic so it gets weird fast at casting temps.

      As an aid to understanding what happens after the scan, may I suggest the following link. It is written for a cad/cam and cnc perspective, but is rather informative in history and low level facts.

      http://hackaday.com/2016/11/11/an-introduction-to-cnc-machine-control/
       
    3. Nik@BMDL

      Nik@BMDL New Member Full Member

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      Bump?
       
    4. zahni

      zahni New Member Full Member

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      Why not send the file for slm. You get your frames back check the fitting and polish it, finish. Of course it depends on the quantity you have.

      Gesendet von meinem F3112 mit Tapatalk
       
    5. CoolHandLuke
      Fiendish

      CoolHandLuke Well-Known Member Full Member

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      you have many options.

      many printers are capable of printing a frame. as above, Digital SLM via argen may also be an idea you hadn't considered.

      this post wont be much more helpful. for two reasons.

      1, printing a frame is easy. high resolution, high quality printing is acheivable with the right budget.

      2, even if you havea high quality printer the whole thing can be ruined with poor casting. its easy to say the machine didnt produce a good frame when your casting goes awry.

      if you end up with resin based frames, use phosphate free investment. thats about all i can directly advise. i can't advocate one printer over another. results from everything will be slightly different. for example i have an DP3500 and an MP4500. the MP is set to lower quality to get faster units out of it. the DP is set to higher quality for the best prints possible (for gold and pfm), but the frames printed in the MP actually end up fitting better. post cast there is less finishing.
       
    6. zahni

      zahni New Member Full Member

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      Don't know how many frames you have. But you should also think about the learning curve. If you are new to cad/cam it could be useful to think about it step by step. First the right software and scanner and get to know the work flow of the design. After you can think about the further process. Each element has a lot of different options.

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      • Agree Agree x 1
    7. Makes Dentures

      Makes Dentures Active Member Full Member

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      How many frames do you do a month-- is your time and financial investment worth the return? How long until you actually turn a profit on a FW? Does your business model have room for this liability? It's all about the benjamins....
       
    8. Nik@BMDL

      Nik@BMDL New Member Full Member

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      To answer that last two posts . I currently do about 250 cc frames per year and continually growing. About 200 are my own (I am a prosthetist or denturist and own 3 clinics 2 of which are Surgerys as well that I practice in myself. The rest are from local dentists . I don't outsource anything in my lab or clinics and run the lab solo as well .. I work 7 days and am looking into the future and digital seems the way to go .. I have very little debt on my books and feel that I either hire someone which is proving difficult as I am not about 2 hrs away from the cbd and see this as a way to increase efficiency in my workflow and also develop my skills in an ever increasing market I'm happy to spend up to 100k but think I could do it for less . I have booked my ticket for IDS Cologne 2017 and hope to jump on something there .
      It's not about if I should but it has always been about when . My q's are more to the guys that are doing RPD's this way and if they feel generous to share some info that they had to bust themselves to figure out !
      Fyi I have also done many hrs of research in direct metal printing but this ROI is a hell of a lot longer than resin printing . I think I'm about 5-10 years it may be better though so the learning curve you talked about previously would help if I decided on this in the distant future




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    9. zahni

      zahni New Member Full Member

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      200 frames are not that much. I have used 3shape and have made some frames it works, but imo it's quite pricey. Back then we tried resin prints and also slm by outsourcing. We decided to go the slm because you get a almost ready metal frame back, minor adjustments and polishing, finish. Today resin printers are more developed and affordable. Just a few companies you might look at, Shera, Bego Asiga and also formlabs. There is a Facebook group regarding formlabs for dental perhaps also a way. Where are you located?

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