Andy the first 2 failures were with the old FEP, the third and possibly fourth after an extensive clean of the build plate (kitchen towel and IPS until all the accumulated black crude was removed). FEP replaced at this point along with a relevelling of the build plate 2-3 tests with the same results. Resin going off - been there got the tick, at this point all had been done with used resin so I emptied and cleaned the tank and used fresh new resin, 2 more test same results. Its at this point I gave up and wrote #817 because I was completely out of ideas. Should have said after each failure the plate was recleaned with IPA. I will however check the tank bolts to see if they are tight enough, not something I thought of.
In between all the chaos of prints failing to detach from the FEP I have been trying to thread up tiny safety hooks and fine chain, having tried one of Rob Pulhams suggestions and failed , I decided to try cut open one of the chain links so I could then thread the hook on to it, it felt like so that got abandoned and finally I decided to go drastic and tried cutting into the hook so the chain could be treaded on to it, essentially just linking a coupling hook and chain, more of this so finally I went the whole hog and took a razor saw to the hook cutting into the eyehole and then inserting the chain. It worked, but I hadn't got a way of closing up the cut. After some thought I decided to drastically open the eye holes up and then push the brass closed, all of which worked. The first one took quite a while, but another three only took 15 minutes each and fitted to the R3 hopper now look like this: Only another 32 to go so roughly 8 hours work unless I speed up, at last some success in a bad week. I damaged quite a few hooks while experimenting but I know where to get them from. The chain might be a problem if/when I run out because I can't remember where I got it from, grrrrrr.
To give a perspective of what I have been playing with the photo shows 4 x hooks and chains and a single length of 7 links of chain (4 needed). All that is needed to create the 4 safety chains for a single wagon, with a 1 pence piece to give scale. Oh, I found the source of the chain, so that's another problem resolved.
Hi Andy, it's not the screws loosened off, the FEP stretches especially after the first couple of long prints - always worth giving the fep a ping to see if the note has lowered, for the tone deaf like me, a Guitar tuner on your phone is a good shout. Better to frequently re-tighten than over tighten and get a ripped FEP - Murphy will strike when you always have a full vat. Here is my Mono X (Number 2 the faster one) Lift distances and speeds for ABS Green resin Note bottom Lift distance is 16mm in Total for 3 layers @ 10 sec per layer, the lift is split into 2 parts 10 + 6 both parts at 120 mm/min (or 2mm/sec) The retract (or lower) spedds are 90 & 180 mm/min or 1.5 & 3 mm/sec. The frightener is the normal print lift height 4.16mm in total @ 60mm/sec, and retract at 90mm/sec. Don't ask me how I got a 4.16 mm either a recommended setting from someone or a typo, but it works and I'm getting some lovely prints of this machine. Three base layers and the prints are still difficult to remove from the build plate Paul
Paul, Denial first, bondage isn't my scene but you would need a hell of a lot of these little chains for any meaningful tying up games even for a 7mm scale Victorian lady. What I could do is turn them into designer ear rings for the more out there dresser, but second thoughts I will stick to doing the absolute minimum number required for the models, I value my eyesight to much.
Those on the model certainly look well worth the effort in my view. Oddly I rarely have issues when messing about with fine chain other than dropping bits on the floor which I seem to do regularly with almost anything I touch.
Rob, et tu brutea, I spent more time grovelling on the floor that actually building the things! Sorry my Latin is crap. I'm still waiting for a nice bright sunny day before embarking on building some more, I think 2-3 sets would be a max in any day,
Nah, on this occasion, they had def become loose! One was stood proud of the ring! And i know I had put tension on them all evenly as I go opposing sides like car wheel nuts. Andy
Paul Wimp, wimp, how dare you I'm a rough, tough, argumentative Yorkie I will have you know! Thus afternoon between monsoonal down pours we had an hour of sunshine, 2 full sets of safety chains done. It gets easier once you have sussed out the best places to cut the mounting and hook. Done for today as yet another deluge has just hit Leeds. The safety hook etch I ordered from from Roxey Mouldings each etch is sufficient to do 6 wagons (24 chain sets) or on my part given damaged parts 5 sets and some spare bits, so I ordered 2 more etches yesterday afternoon, they arrived at lunch time, pretty good service I reckon. The chain which looks like copper but claimed to be steel comes from scale model scenery. Your order it in 1/2 metre lengths, 7 links give a length equal to the 3 links of a coupling hook. I ordered 1 metre and have loads left but will be interested to see how many set that makes up. A Yorkie Wimp grrrrrrrrr
Aye still a wimp, bet you stayed in the dry rather than outside in the wet to make up the chains, I remember when I was knee high to a grasshopper.......... why does the smell of Hovis bread spring to mind
Ha Ha, I remember both those clips very very well. 2 more sets made up this morning, it's much easier once you know the best places to cut. For anyone else needing to create some of these, this is where my cuts were made. Obviously not the only solution but this one works for me. Rats I have drawn the hook the wrong way around but the cut line in the right place!
What I don’t get… is all the canned laughter? As much as I like the Two Ronnie’s, what was funny about the shots of him walking up the hill patting the bread? Surely the funny bit is the punch line? Sorry, I’ve digressed the topic.. Andy
Are the links not still slit and just open out with two pairs of pliers and twisting? I’ve never had to cut any coupling hooks etc? andy
Hi Andy Yes there's a join, it's seriously hard to find and unlike say a coupling link the join is on the crown of one of the bends not along the long axis. Given each link is 3mm X 2mm o/d, and half the interior is taken up by the next link trying to open the join up I found impossible and as for trying to close it up again when there is either a hook or a mounting also getting in the way I judged it way way beyond my skill levels though I'm sure someone with proper eyes not my cataract replacements could possibly do it. All of which explains why I went down the cut into the hook line.
Fair comment Mossy. You did say something about that earlier, it just didn’t sink in. will they not 3D print?
Hadn't even thought of 3d printing, but I do like the flexibility the chain gives. In normal life I use 2.5 readers where necessary, for modelling I use them plus a +8 magnifier on my head loop. There is +10 and +14's on the loop but I find the depth of field with either of them absolutely minimal so I don't use them