I just got the following parts quoted (I asked for a ballpark quote, got a detailed one -- hmph). Here's a rough sketch, with unnecessary detail _and_ things left out:
Is this just what I can expect to pay for these things? Did I go to the wrong shop? What are the cost drivers here?
I'm trying to put together a training device that I can include in the cost of a seminar, $36 is more than 1/3 of the worst-case BOM cost that I was contemplating. I need to know if I can beat this down by being creative, if I need to bite the bullet and accept a higher BOM cost, or if I should yank my eldest out of school and put him to work in the garage bending metal!
The principal of this thing is that there's a counterweighted arm that swings on a shaft that's pivoted on bearings in the large holes in the frame. A microprocessor monitors the position of the shaft through a potentiometer and controls the voltage to a motor/propeller, with the goal of holding the arm at a commanded position. The hole locations are assumed to need tight tolerancing because of the apparent tolerance needs of the pot I'm planning to use, but I'll be re-thinking that decision here soon.
Thanks in advance.
Sorry this is off topic - would it help if I mention that I'm putting my vote behind Hillary McBama, with Ralph Paul as her running mate?