Replicating Ormerod

I have been looking at my kit wondering about replication.

The Extrusuion is readily available on ebay.

Thr 12mm silver steel ground rods are available but mostly in 333mm length just 17mm too short.

I assume the motors are reasonably common. Does anyone have the exact specification? Nema 17 seems to be a frame size.

The electronics board cost about 120 pounds which some think is high.

The power supply is available remarkably cheaply about 12 pounds.

Perhaps some of the current supplies of motor and electronics kits can be adapted.

It would be nice if others who are interested could post their observations here as well as name sources for parts.

Edited 2 time(s). Last edit at 12/22/2013 01:04PM by Rory166.

Hi Rory166,

do you have a vendor/ URL for the extrusions on ebay?

Markus

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XBee & electronics blog: [lookmanowire.blogspot.com]

Markbee

[www.ebay.co.uk]

Tis vendor will cut the lenghts for you. There are plenty more just type in 20x40mm aluminium extrusion. It will be necessary to tap the ends but this is easy.

[www.ebay.co.uk]

Is cheaper but only in 1m lengths.

Edited 2 time(s). Last edit at 12/21/2013 10:03AM by Rory166.

I've started to compile a parts list here

http://goo.gl/87Wrzg

feel free to edit and update

Matt

Edited 1 time(s). Last edit at 01/02/2014 01:44PM by iamburny.

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Limited Edition Red RS Ormerod 1 #144 of 200 - RRP 1.09fw
iamburnys Ormerod Upgrades Github
Follow me on ThingiVerse My Designs

Hi Matt

Thought this thread had died.

Good work the Duet is from think3d and is 120 pounds. I was sent an ACE psu which is similar but can be cheaper at 10.50 plus VAT.

Rory

Edit

I am certain stainless steel rod is unsuitable, Ian I think has said they use Ck55 steel but I will check.

Edited 2 time(s). Last edit at 01/02/2014 06:29PM by Rory166.

@Rory166

maybe this Carbon Steel rod is more suitable, even mentions the same linear bearings

[www.ebay.co.uk]

Matt

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Limited Edition Red RS Ormerod 1 #144 of 200 - RRP 1.09fw
iamburnys Ormerod Upgrades Github
Follow me on ThingiVerse My Designs

That must be the stuff ck55. precision induction hardened ground rod.

The threaded rod is stainless I assume but have not tried the magnet test.

Rory

In my ignorance I have ordered another type of hardened ground rod, at this stage I cannot say for sure which is best.

CHEMICAL ANALYSIS % C-1.15 Si-0.25 Mn-0.30 Cr-0.65 V=0.10
SUPPLIED CONDITION Annealed 180-240 BHN GROUND AND POLISHED AVAILABLE 1-2-3 METER LENGTHS
TOLERANCE
METRIC h8 (minus tolerance)
10mm-18mm +0 -0.027
HEAT TREATMENT (FOR GUIDENCE ONLY)
Heat slowly to 780-800 deg c quench in water to achieve 64rc, temper at 150 deg c for 62rc, 300 deg c for 58rc.

As you can see this is higher carbon and si,Mn and Cr. Time will tell if I have made a boob or stuck lucky. It mentions polished which I suspect the ck55 may not be, ck55 does feel quite rough when the bearings are moved.

Any expert commentary greatly appreciated.

Edited 1 time(s). Last edit at 01/03/2014 08:20PM by Rory166.