As I mentioned in my last blog the next bit of workshop machinery I fancied trying to reproduce was a pillar drill. This proved to be quite a tricky bit of modeling just because there were so many features. I'd taken a photograph of this drill in the shed at Thelkeld.
It looked to me as if the drill was originally belt driven with a 'new' electric motor powering the original drive wheel at the bottom. There then seems to be a belt which takes the drive to the top of the drill via a choice of three pairs of pulleys depending on the speed you require. I could also see the interesting hand wheel which raises and lowers the platform on the pillar. I'm not really sure exactly what all the rest of the gubbins on the top of the drill is for. Perhaps someone can enlighten me. It looked to me as if there was a handle to pull down the drill head but it looks as if this can be reconfigured to give some kind of automatic geared lowering? It looks like you could set the machine up and leave it to drill down at a preset speed? Anyway, it had lots of interesting shapes and, while I've not exactly modeled it all precisely I hope I've captured the feel of the prototype.
The main pillar was divided into two and the table and bottom drive wheels printed as separate parts. Also separate are the hand wheel to lift the table and the quadrant handle. The parts took just over 4 hours to print at .04mm layer height on the Anycubic Photon. The parts took a little cleaning up but I was blown away by the detail which came out. The toothed rack behind the drill head and the teeth of the gears came out remarkable well, even the lift rod on the table has a thread on it (albeit with a rather coarse pitch than the prototype).
Please bear in mind that this part is only 35mm from front to back.
I intend to make some drive belts out of paper in a bit.
I found a rather nice Bachmann 16mm fireman and together with workbench you can get a sense of scale.
The sharp eyed amongst you will have noticed that there is a section of wall behind the workbench rather that piece of MDF and I'd like your opinion on this. I've never been any good at trying to scribe random stone so I thought I'd try a rolling pin I downloaded from the thingiverse. This printed out on my Ender 5 and looks, well frankly, a bit weird. The roller is 86mm tall and ~25mm diameter so gives a repeat in the pattern at ~80mm. I laid down a 6mm thick of layer of Sculptamold and let it go off for about 30 minutes until it was firm but still 'green'. The roller was rolled into the surface and it took the pattern well. I then made the pattern slightly less patio and more wall by adding in some extra horizontal joints in the stonework. I also found I could smooth in a little extra Sculptamold to fill in some of the joints to make the pattern so it didn't repeat so obviously. Finally I found that a coarse old paint brush could be used to apply a little more texture and strata markings to individual rocks. Do you think this will work as the inside walls of the shed? Ultimately I want something which looks like old white-washed stone.
Please let me know what you think.
Edited by Fen End Pit