This is a blog on building a plastics printer (aka a "repstrap" - rapid replicator/bootstrap), which I have decided to call FAITH.
Partly because that’s what I need to believe this will ever work and partly because I hope she will be able to reproduce items faithfully from their plans.
I want to post costs, vendors, plans, problems, errors & solutions, with piccies too & update as I go, so you know exactly where I’m up to.
Wish me luck.
Friday, 11 September 2009
On the surface
It has taken me about an hour to get together all the surface-mount parts for the first stepper motor driver board, and I haven't even put them (nor even the solder paste) onto the board yet. I'm very glad I used my own identifiers when I submitted my order to Farnell, because one rating of ceramic capacitor has no useful information other than "capacitor" on the Farnell label, so I was glad of being able to cross-reference. Also, having a spreadsheet of suppliers for each component per board was useful, so that I knew I was looking for a RS part for this and a RapidOnline part for that, for example.
Here is a picture of different packaging, of resistors: same idea but this time mostly soft card with transparent film windows in it. Here are all the surface-mount parts laid out around the board. You can see one capacitor still in its packaging towards the bottom of the picture - that is to distinguish it from the others.
I had forgotten that I hadn't been able to find everything as surface mount, and now I look at the 0.25 ohm resistor, and go, "Oh my, how on earth am I going to mount this on the surface? It's (relatively) huge". Now I do remember BodgeIt giving a link to his non-surface-mounted component done as surface-mounted, so I'm hunting that down. I shall have to stand this resistor vertically because it won't fit in any other way. So I'll do that when I do the manual soldering for the through-hole components.
Background in environmental science, keen on making things work, from altering jeans to FIT, to cooking alternative cakes, replacing bad flooring, making a robot..
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