Wow, has it really been 3 weeks since my last update?
I haven't been idle, but have been doing a lot of playing around with the printed parts. Here's what's been going on chez moi.
Firstly, the seat, since that's where we left off.
Further tweaks and adjustments to shape and size of the base, mainly in shortening it slightly further, followed by designing the seatback. That of course led to numerous prints, tweaks and re-tweaks of the design until I was happy with it. Bear in mind I have no measurements, so all this is being done until it "looks right".
This is the early design, just to get the overall shape.
Adjustments were made - the back was shortened by raising the bottom edge, and the whole seatback was raised to sit higher on the base, maintaining the overall height of the seat. I widened the front edges to sit around the base better, redesigned the bracket holding the seatback in place, and positioned it a little further forward to eliminate gaps between the back and the base. Once I was sure the overall height was ok, I added a plane and cut the bottom off, adding brackets underneath instead - the height was assured because I just extended the brackets to the original base plane. Another plane was added, again cutting the base, but I didn't remove this part. I widened it slightly to give the base part that the squab was mounted on.
This is where I am now.
A big improvement, but I'm still not sure why those prints aren't as crisp as they should be.
Next, the gearbox.
This is what I designed.
Upon printing it was obvious that I had made it too small.
Fortunately, Fusion has a scale function, so I enlarged it by 25% and reprinted.
I may even enlarge it a tad more - again the problem is that I have no measurements to work with!
Finally, the wheels. I started with the wheels I designed for the SSKL Merc and resized them and the hubs. A couple of tweaks to ensure they fitted the tyres properly and they are ready for further detailing.
Another issue I've been having is that the upper side of all prints (the side facing the plate and between the supports) is blurred and shiny. I thought at first it was a cleaning issue, but I think I have part cured resin sitting on the top which won't wash off. I've only had this issue since switching to the Mars 4 Ultra and Saraya Tech Fast resin. You can clearly see the difference with the one on the right showing the upper surfaces.
I noticed I had the same issues with the Siraya Tech Exposure test piece.
Notice the inlaid crosses on the far side have shiny residue in them which leaves them blurred at the edges. It also shows the same blotches on the surface.
In an effort to eliminate that, I did another print with the gearboxes mounted vertically. That led to failure of all the vertical parts! I noticed while trying to clean out the failed prints that the film seemed to have a ridge in it, so I emptied the resin vat to take a look.
I may have caused that while removing the failed prints, I'm not sure, but new film has been ordered along with Elegoo Rapid resin and I'll see if that makes any difference.
If anyone has experience of these issues and can offer advise, please speak up!
Meanwhile, there's more designing to be done!
Thanks for looking in,
Ian
