Another Sintratec kit built

[rudschul]

yes this is important:

The frontal light shade has to be adjusted correctly. the shade of has to be aligned exactly to the backside.

You remember the L-Peaces near the lamps. The L-Peace of the front lamp makes the shadow. You can loosen the screw and move the L-peace

[Mike Francies]

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 were better but still not staying flat.

I will have a closer look at the shade - difficult to get at though.

[rudschul]

When you prepare the print with the software the lights will go on. Use the key to shut down the laser and open the door. I think than will see it and you can play with the position

[Mike Francies]

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 it was close to the right place. I then followed Roman's procedure to get the powder temperature right. I ended up at 172C but I can notice that the right side of the build area does start darkening before the rest. I think it may be that the IR rays are being reflected off the aluminium of the blade carrier which is parked just at the right edge of the build area. The darkening of the powder was something I had not noticed before and until you actually see it you don't recognise the difference (if that makes sense!). Maybe the importance of the positioning of the shade should be made clear in the instructions - if it was, I missed it!

It was very difficult to alter the temperature accurately with the slider. Can we please have a couple of buttons on each end of the sliders, much like the powder chambers, to give 0.1C and 1.0C changes? Trying to juggle the slider, toggle the 'send to printer' button and then re-opening the calibration window all while the next layer was being put down was not easy! The window should stay open while adjusting the temperature and sending to the printer and then use a 'Close' button to close the window, it should not close just because some values have been sent to the printer.

The measurements are pretty close at 40.03mm in X, 40.31mm in Y and 5.02 in Z. This raises another question. For my previous print I had used the software calculated scaling which has given me these current measurements. When I re-open the scaling my previous values are still there. Do I reset the values to zero when putting the new measurements in or should the old values be left or does it matter. In other words, what values are the new percentages applied to, the ones previously sent to the printer or the original values before the last percentages were applied?

[Mike Francies]

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 the software is working. When the 'Calibrate' screen is selected some values from a previous attempt are showing. Should these be reset to zero before calculating the current values?

Also, barely visible next to the Z value it says 'Keep Zero'. Unfortunately I changed this value after the first print because the Z dimension was slightly out but because the 'Keep Zero' message is so feint I missed it. Why are we allowed to change the value if we have to keep it at Zero? How do I now reset this to zero?

[alex burn]

Hi mike,
I decide to buy a kit, but i am not sure if I can complete it, can i ask you to email me the kit manual to check the complexity of the kit?
Thanks alot

[Mike Francies]

Hi mike,
I decide to buy a kit, but i am not sure if I can complete it, can i ask you to email me the kit manual to check the complexity of the kit?
Thanks alot

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 back to you about the construction manual.

All the best,

Mike

[rudschul]

Nice to hear :-)

[arturK40]

Hello I am Artur,
my Sintratec kit does not work optimally yet. How exactly do you set this the reflector. Can someone send a photo of his set reflector? Have the left and right lamp off. Then the mitleere adjusted so that it radiates to the edge of the back wall. Is it correct that way? For me in the front of the cake is too tight I can not get the components out.
Thanks for your help. I'm writing with a translator
IMG_9904.jpgIMG_9905.jpgIMG_9907.jpgIMG_9909.jpg

[rudschul]

Hi,
do not tight strong the reflector. I have tighten the reflector as strong as it it possible to change adjutment with knocking against them. The right position you can only see when the lamps are on. See picture from Mike at this thread (11-17-2016, 05:49 PM )