Category: RepRap

Apr 16 2010

Spent most of today creating inventory templates for workshop stock. After unexpectedly running out of materials yesterday, I’ve realised I need to manage it all much more actively.

I also have an order of electronic sundries on their way to me, including some Darlington transistor arrays and stepper-driver ICs. This should be enough to get prototyping of the Bonsai Repstrap to the next stage.
Comparing the price of dedicated driver ICs, I’m wondering if I couldn’t make quite a saving (on cost and part-count) by using a Sanguino rather than direct Paralell-port control.
The Reprap still uses stepper driver ICs as well, but could a Sanguino drive the Darlington array directly? It sounds like it would have enough processing power spare to manage the sequencing.

Anyway, time to see how the castings are doing in the heated cabinet, and get some inventory done.

[20/06/2010: Amalgamating old posts from “Dreamwidth Creative Blog” into sci-fi-fox.com to re-purpose DW blog account.]

Apr 15 2010

Run out of Shore 40. Need to order some more in and write up a proper supplies tally sheet so I don’t get caught short again in future. Only one current order should be affected.

I’m also down to the dregs of the water-clear resin. Will probably only restock on demand for the moment.

Also have created a page for the Bonsai Repstrap on the RepRapWiki; http://objects.reprap.org/wiki/Bonsai_Repstrap

Need to place orders for more shirts for Confuzzled in a months time. Hoping to have one of my own designs included in that order.

[20/06/2010: Amalgamating old posts from “Dreamwidth Creative Blog” into sci-fi-fox.com to re-purpose DW blog account.]

Apr 14 2010

Some progress

I have not been coping well today.

Footpads haven’t bonded correctly. Gluing method hasn’t worked very well. I guess the rubber chemistry changes while setting. Unset won’t bond to set.
Going to have to try slashing the velcro to get rubber to bond into it better.

Still, one set come out acceptable.

More casting tomorrow. May catch up yet.

Also roughed out the folding mechanism for the Bonsai Repstrap..

A portable 3D printer is certainly feasible.

[20/06/2010: Amalgamating old posts from “Dreamwidth Creative Blog” into sci-fi-fox.com to re-purpose DW blog account.]

Apr 09 2010

Three things

Once again, things have been busy here! I’m currently processing orders, albeit with a small delay (manifold broke off the degassing chamber and I’m waiting for the glue to set).

There have been two major developments however.

UKFur
I’ve now purchased the UKFur merchandise shop from previous owner Tigerfire, who’s no longer as involved in the Furry scene as he once was.
In the next couple of days I should receive the first batch of new stock, to get a small number of the most in-demand shirts and sizes.

The three designs of shirt

It’s out of stock of the lanyards, but I’m looking around for a supplier that will provide them in minimum orders of less than £200.

However still have large numbers of vinyl stickers and silicone wristbands.

Confuzzled is just a month away now, so have no fear, you will be able to get your UKFur merch!

In the meantime though, wristbands are £1.50, stickers are 50p each.
B&W shirts are £10 in Small to XL sizes, and £11 in XXL and XXXL.
Blue shirts are £12 in Small to XL sizes, and £13 in XXL and XXXL.
£2 for postage, and I still take paypal.

If I’m out of stock, let me know the size you’re after so I can get more in and I’ll let you know when I do.

Chest sizes: S – 35/37″ M – 38/40″ L – 41/43″ XL – 44/46″ XXL – 47/49″ 3XL – 50/52″

Reprap
Shortly after buying the UKFur shop I also acquired a lot of 2000 surplus stepper motors.

All boxes full of motors (ignore the SEM bits)

I strongly believe the future is in 3D printers, but there’s a big supply issue. Even the home-made machines tend to require you to already have a 3D printer to make parts for it.
The way around this is to make a bootstrapping machine to make the initial parts. A rep-strap.

The motors I have are smaller than those advised in the Reprap project, but I have my own take on it. I’m developing a small, semi-portable 3D printer, that should be fairly cheap and easy to modify. I’m looking at a sale price in the £200 range, and a quantity of around 500 machines.
Because of the small size of these printers, I’m dubbing it the Bonsai Repstrap.

It’s an ambitious project I know! But if you want to follow how things are going with it, take a look at..

The Creative Blog
I’ve set up a journal over at Dreamwidth as a stand-alone creative blog. While this won’t be strictly business related, it will include and business creations and day-to-day activities as well as my personal works.
Dreamwidth incorporates RSS feeds into the blogs, so you don’t have to sign up to follow it. It also accepts OpenID logins, so you can comment if you like.

[20/06/2010: Amalgamating old posts from “Dreamwidth Creative Blog” into sci-fi-fox.com to re-purpose DW blog account.]

Mar 29 2010

Contacted shirt supplier. Should be able make an initial small-order with a penalty fee, but it’ll get in the stuff there’s demand for.
Also enquired over getting patches made. Ballpark prices fairly reasonable. But don’t think I could get much of a markup on them. Still..

Received in the post today; 24 DIL sockets. Should allow quick replacement of the 4N35 photo-isolators on the parallel port breakout board I’ll be making for the Bonsai reprap. I really don’t want to kill the workshop PC, after-all. Nor do I want to have to re-solder the board when something inevitably goes sparkly-wrong.

Currently doing inventory on mobile shop stock. Almost there.

[20/06/2010: Amalgamating old posts from “Dreamwidth Creative Blog” into sci-fi-fox.com to re-purpose DW blog account.]

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