A bit crude, maybe, but this is pretty much the method Roundhouse advocates for valve-timing on their kit models.Trevor Thompson wrote: ↑Tue Nov 10, 2020 1:23 pm The drawings showed 8BA grub screws holding the eccentrics. I adjusted them initially at dead centre. When assembled I adjusted each one until the valves were opening just after dead centre, and closing again after about 75 - 80% of the travel.
A bit crude I know but it seems to have worked.
Trevor
I must say how glad I am you've decided to start posting about this model. Many of us lack the skill and/or machinery to make a locomotive completely from scratch, and there are several of these in the works right now which is very inspirational. And, this shouldn't be considered a slight towards anyone's building, but the other chaps, well it seems to me that their builds are very polished- which is a good thing- but I especially like this one because you readily admit that sometimes your ideas don't work out, and your locomotive (again I hope not to cause offence) bears the tool-marks from having been made out of pieces of metal hand-worked the old-fashioned way. Which again, isn't necessarily a virtue nor is it a fault, but for me it's just a little easier to appreciate in a way for someone like me who struggles to do a nice job on a Brandbright coach-kit and usually has to do things twice or thrice before they work out. I like to hear about the trial-and -error approach to home engineering, although when it happens to me I struggle to persevere sometimes.
Anyway, I just wanted to register my appreciation for your work, and I'm looking forward to seeing more.