chrisb wrote: ↑
Sun Nov 22, 2020 10:10 am
Jim, if I add a 120mm constraint to your sketch "Holes" I would have expected it to be overconstrained, but it isn't. Do you get the same ok from the solver?
Quite probably you are right, I just ran out of time trying to workout what was needed to fully constrain those not fully constrained sketches, there was a lack of consistency on how some things were sketched and it was quite confusing.
I had to cook dinner for my family and check on my goats etc. We had a few spots of rain so I had to run around moving the goat shelters into their current paddock so Chloe could take her babies out of the rain if it really came down hard, of course being Australia, as soon as I moved the shelters the rain stopped!
At this time of year or even in our winters its not nessecary to provide adult livestock shelter, its actually better for them to get rained on as it washes them a bit. But these new born kids are different, very small more delicate, for the first few days at least.
Honestly if I was doing this cover myself I would wonder if the triangles are worth the effort, if I wanted something similar I would probably just use round holes, but some fan vents are concentric curves like I did in my first attempt but more of them. Either way I would have considered modelling one set of vent holes and then using a Pattern feature for the other.
There may be a good reason for the slots but I suspect it is just to allow for sloppy size control and if so I would have considered just using round holes with adequate clearance to give enough wriggle room to get the screws to line up since the slots only give you flexibility in one direction and with modern cnc based manufacturing being so accurate and reliable it is likely that a round hole could be adequately precise. But I am guessing of course.