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Type: Posts; User: Mike Francies

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  1. Replies
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    Manual

    Hi Alex,

    The kit is not difficult to assemble, just time-consuming. It actually goes together very easily as all the tools necessary are in the kit and the instructions are excellent. I will get...
  2. Hi rudschul, I am seeing similar results. The...

    Hi rudschul,

    I am seeing similar results. The more parts there are to print, the more difficult it is to remove the powder. I am pretty sure the reason is that the laser is adding to the surface...
  3. Front right and left are the worst for me....

    Front right and left are the worst for me. Clearly the door is giving the biggest problem and it is probably the easiest to fit a reflector to. I will try some cooking foil the next time I print and...
  4. The problem with just lowering the laser speed is...

    The problem with just lowering the laser speed is that the powder is still not hot enough to stop the warping and in fact just lowering the laser speed actually makes the warping worse as there will...
  5. Hi rudschul, The cooling duct printed without...

    Hi rudschul,

    The cooling duct printed without problem and no curling/warping at all. (see attached photos - quality of photos not too good from my phone) The part has not been post processed other...
  6. That's an interesting project. I had not seen it...

    That's an interesting project. I had not seen it before but it appears to be an awful lot of work! The Sintratec will be good for some of the smaller parts but I think the SkullServoFix is just a bit...
  7. Yes, I do get the white film on the outside of...

    Yes, I do get the white film on the outside of the printer but so far this does not seem to have been a problem for me. I am surprised it gets into your micro switches enough to make them stop...
  8. I think you need to raise the surface temperature...

    I think you need to raise the surface temperature to cure the warping problem. If the surface temperature is very close to the melting temperature, the part has no chance to cool down and therefore...
  9. Hi rudschul, I too had warping issues until I...

    Hi rudschul,

    I too had warping issues until I raised the powder surface temperature to 174.2C and lowered the speed to 550mm/s. What I had noticed was that at startup, the chamber temperature and...
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    Hi rudschul, I have some sympathy with you. I...

    Hi rudschul,

    I have some sympathy with you. I have an open ticket that has not yet been resolved. It is to do with accuracy and the printing area. I printed two, identical parts yet one comes out...
  11. Another thought - last night I printed some...

    Another thought - last night I printed some calibration cubes and when I put the powder into the reservoir I accidentally knocked the machine. What I noticed was that the powder settled down quite a...
  12. Hi Rudschul - I assume the layers are solid and...

    Hi Rudschul - I assume the layers are solid and because the sintering melts the powder into a smaller volume there is not enough powder in the next layer to fill that volume. I think you are right in...
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    Hi rudschul, On the advice of Sintratec, I have...

    Hi rudschul, On the advice of Sintratec, I have not yet tried experimenting with the parameters. However, on my OpenBeam Kossel Pro I have done a huge amount of experimentation and can print down to...
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    Hi rudschul, good to see your machine is now...

    Hi rudschul, good to see your machine is now performing properly. You are very lucky that you were able to visit the company and get first class help from those with the best knowledge. I am very...
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    I am now very happy with how the printer is...

    I am now very happy with how the printer is working and it is producing some good parts. However, these parts are still not quite right dimensionally and this is where I am still confused as to how...
  16. Replies
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    Success!!

    Hi, thanks to Roman and rudschul I am pretty close to optimal settings. I moved the shade back but it is very difficult to see where the shadow is and as I could not see it on the powder, I presumed...
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    Will just half of one degree make much difference...

    Will just half of one degree make much difference when the temperature fluctuates more than that as new powder is introduced and is never very steady even when doing nothing? At 175C the first layers...
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    Now I am really frustrated. Two more aborted...

    Now I am really frustrated. Two more aborted prints today:(. This time I loaded the print chamber with four of the test pieces, in a similar pattern to that shown in Roman's photo below. All four...
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    Interesting - Roman has just responded to a...

    Interesting - Roman has just responded to a ticket I sent about the issue and he says the chamber temperature does not matter too much.

    The first prints were done at the default values with the...
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    Hi Rudschul, colour of the powder is difficult to...

    Hi Rudschul, colour of the powder is difficult to ascertain but it doesn't seem to discolour at all. I appreciate what you are saying about the warping and the difference in temperatures but I am...
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    Thanks for the reply Roman. Below is a copy of a...

    Thanks for the reply Roman. Below is a copy of a ticket I have just sent regarding my test prints.

    Printer is now operational and I have been attempting the test print. First print was not good...
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    Thanks fred, you are right that it does not make...

    Thanks fred, you are right that it does not make sense to fill the chamber if only making tests of small items. If I don't get a definitive answer from Sintratec, I will try with just a small amount....
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    Replacement driver and switch arrived today so I...

    Replacement driver and switch arrived today so I was pretty keen to get them fitted. Had to earn some brownie points first though before I could play:(. I first checked the driver was working by...
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    Well, it's taken five days but my replacement...

    Well, it's taken five days but my replacement parts are finally on their way. Can't wait to get this thing fired up!! I have got quite a few things lined up to print as test pieces and a fair few...
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    Nicely said, rudschul - a strong community can go...

    Nicely said, rudschul - a strong community can go a long way to help alleviate problems and frustrations by owners helping one another. The supplier (Sintratec) can also get valuable feedback from...
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