Another interim post just to continue my ‘warts ‘n’ all approach’ to this project.
I’ve begun wiring up the LEDs which will be a task in itself as each has to be tailored to its position in a lamp; this to ensure that feed wires don’t sag beneath the gantry and become exposed, the reason I increased the depth of the gantry crossmembers in the first place.
The process is extended time-wise by having to test each individual assembly twice: once when the wires are attached by soldering to a resistor, then removing the resistor to allow heat shrinks to be threaded onto each wire before adjustments are made, then reattaching the resistor and testing again to make sure all is still in working order.
Despite using the thinnest wire I could find (USB wire purchased for the task) it’s still a struggle to navigate them along a comparatively narrow corridor as this, as they’re stiffer than you would think when contorted as necessary. It also puts a strain on the bulbs in their holes, twisting them from their original positions and thus exposing the wires, which can then become visible through the gantry. In order to combat this, I’ve ordered some black-tac which can also be used to hold the pre-shaped wires to the crossmembers of the gantry.
To this end, I’m also going to retain the end pair of brass rods originally intended to enable the platforms to detach. These will help keep the wires horizontal and form a fulcrum for the wires to wind around as they descend along the stanchions. As it’s like threading a needle, their ability to slide in and out greatly assists with the task. Probably the only point working in my favour thus far……….
And talking of the gods conspiring…… when I came to remove the removable gantry section, only one end came away when I removed the brass ‘pins’ holding it in place. Bearing in mind I’d opted for superglue for the additional crossmember supports, my blood ran cold. Fiddling with a blade quickly followed by the blade of a screwdriver, it quickly became apparent that it was that particular end of the gantry which was stuck fast, or at least the lower third. Working with increasing force, I eventually managed to prise it apart using a large disposable stance bladed knife. Somehow, styrene glue had flowed into the lower joint fixing it fast and I reckon I was lucky to get it apart without inflicting further damage.
A quick clean up with fine files and wet and dry paper returned everything to normal.
The only good point was that it tested the robustness of the build, my scratch built additions proving their worth.
Finally, I returned the hand rails of the upper gantry to the jig for re-soldering as that bulbous joint on one of the legs was annoying me, to say nothing of the half hooped guard that had bent out of true when adding the offending leg. I should have extended the joint with the main rail further along. Perhaps it would have been easier to fabricate another, but there simply wasn’t enough brass rod left over to make a new one.
The realigned rail can be seen atop the gantry in this (still just placed for the photo) shot:
Hopefully I can return to the model tomorrow (Sunday) and complete the Led soldering job.
Thanks for reading.
jonte