Dear friends,
in weeks of painful grief I want to try to slowly come to my senses and bring myself to continue working on my project ...
For this purpose I took the last printed
Gearbox-Pair (XSFDP) from
Shapeways and examined it once again more closely,
because in retrospect I noticed some things that are not entirely plausible to me and do not really want to please.
In order to minimize the
wax residues remaining despite
Shapeways' cleaning after printing, we had let print this pair in the
best possible print orientation (standing upright), which we had been previously recognized,
Source: ARC Forums (crackerjazz)
which has the following support wax arrangement.
Source: ARC Forums (crackerjazz)
Source: ARC Forums (crackerjazz)
At first glance, the
Combos (XSFDP) look clean on the outside, only there are wax residues in the inner cavities of the gear case and on the underside of the motor, which, however, are not so important for the later
priming/painting, because one can hardly see these areas in the installed state anyway.
However, clearly visible longitudinal grooves on the surfaces are noticeable,
which I cannot explain to myself due to the selected print orientation, which is why I asked
Shapeways for a statement.
These grooves are clearly felt and have after all a
distance/width of approx. 0,4 mm.
These two
SW Combos I have now tried to clean so that they can then be primed and compared with the
Resin combos, which I'll use for the crawler.
This time the cleaning was not done in the dental laboratory but by using my small
Ultrasonic cleaning device,
based on the conditions proposed by
BANDELIN at that time by using
TICKOPUR R 60.
Source: bandelin.com
Since my US bath has no heating, I filled the trough with
50°C hot water and added
20% TICKOPUR.
But since the Combos swam up and didn't want to sink,
I've held them down with tweezers and cleaned them
approx. 2 h by turning over several times at intervals of 10 minutes.
Then they were rinsed in water, dipped briefly in
2-Propanol and dried under the hair dryer.
As one can see, the
cleaning time of 2 h is not enough to completely remove the wax residues out of the inner cavities, but which is no longer important to me.
Both on the underside of the engine, as can be seen here,
as well as inside the case there are still considerable wax residues.
So I want to leave it at that for now and will now prime both combos in this state and also my scratched prototype in order to be able to compare them with the primed
Resin combos.
