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SGI Drive Sled Models

Posted: Fri Aug 18, 2017 8:40 am
by HurricaneJames
I recently decided that my new Octane needs more drives. Surprisingly, drives are not that difficult to find. Drive sleds on the other hand... :shock: I'm certain people around here have some extra they could sell, but they don't look that hard to make. After all, I have a laser cutter and 3D printers readily available. Famous last words... "how hard can it be?"

I'm planning to start modeling the sled parts this weekend or next. Before I do though, does anybody already have them or something close?

Re: SGI Drive Sled Models

Posted: Fri Aug 18, 2017 9:14 am
by Dodoid
Hmm, I too have a printer and some sleds, no 3D models unfortunately. They're kind of complicated but I think doable, if you made them in a few pieces for overhang reasons (you may also have access to non-FDM printers). There's one part that relies on itself slightly bending so as to lock in place, you would have to either ignore that functionality or find a way to replicate that with what a plastic which potentially has different mechanical properties. PLA is very hard and brittle, so maybe for that part you would have a better chance with ABS (I have no experience with it but apparently it sucks trying to get good bed adhesion, to the point that mixing ABS with acetone and pouring it on the print bed is often considered the best or only solution) or just leaving it out?

I have quite a few other SGIs, including an O2 with its weird "lever" drive sleds, and am getting an Onyx and Origin2000 (the latter of which may actually share disk sleds with the Octane, but I forget) tomorrow, so those could also be something to work out. I have an Indy that's completely missing the bracket to mount the hard drive and floptical drive, and I don't think the previous owner had them either because when I got the machine the drive was sitting on a piece of loose pink foam. Perhaps I could 3D print a sled for it, it seems simpler than the Octane one.

Re: SGI Drive Sled Models

Posted: Fri Aug 18, 2017 9:44 am
by HurricaneJames
Dodoid wrote:There's one part that relies on itself slightly bending so as to lock in place


The the little locking tooth on the handle, yeah. I think ABS should do it. Technically, I have access to some really nice 3D printers, but my company would not be happy if I used them for this, so I'm stuck with my little FDM printer. As I understand ABS works alright with a heated print bed and work volume. I do not have those, and plan to skip right past them to some kind of lithographic printer when those patents run out in a year or two and they start to get cheap(er).

In the mean time, I'm planning to leave out the locking tooth. I may try replacing it with a metal locking pin on the front, but I'm not sure. Basically, I do not care what the sled looks like so much as knowing that it fits perfect and holds the drive in place with adequate air space. Everything on top of that is a bonus.

Dodoid wrote:I have quite a few other SGIs, including an O2 with its weird "lever" drive sleds, and am getting an Onyx and Origin2000 . . . tomorrow


Nice, you scored the Montreal haul! Grats

Re: SGI Drive Sled Models

Posted: Fri Sep 01, 2017 10:07 pm
by HurricaneJames
I got the rails done. They are nearly identical to the original rails. They fit perfectly and work. The front section is printing now, with luck it will fit perfectly too. I put the STL file up on Thingiverse, https://www.thingiverse.com/thing:2512810, and will update with the front piece when done.

It is designed to use rubber vibration mounts just like the original and has the gaps necessary to install thing metal em shielding, though I have not put any in yet.

Re: SGI Drive Sled Models

Posted: Fri Sep 08, 2017 2:24 pm
by HurricaneJames
I finished the front piece, and everything fit perfectly :) The rubber vibration mounts were cheapies from Amazon (https://www.amazon.com/gp/product/B003U3TPK0) and really help absorb any inaccuracies in the design/print. See pictures below.

Re: SGI Drive Sled Models

Posted: Fri Sep 08, 2017 3:18 pm
by mopar5150
Well done!

Re: SGI Drive Sled Models

Posted: Fri Sep 08, 2017 3:36 pm
by Hombre71
Very nice!

Re: SGI Drive Sled Models

Posted: Sat Sep 16, 2017 4:06 pm
by tingo
Nice, just very nice!