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-   -   Welding up the Table - Pretoria S. Africa (

CoRn3 Thu 27 May 2010 10:15

I'm quite astonished: Rick (superior bearings) received our payment on the 26th, and our parts are ready for collection at the post office today (the 27th)....


Kobus_Joubert Thu 27 May 2010 13:28

26 of which month ??:confused:

CoRn3 Fri 28 May 2010 01:25

26 of this month, as in next day delivery... from the US, via the SA post office. :eek:

I'll ask when he actually sent it, maybe he sent it before he received our payment? I think that's unlikely though...

smreish Fri 28 May 2010 08:45

It wouldn't surprise me that Rick sent things early. He likes the MM builders and we usually can be trusted to pay our bills!

ciybmc Thu 24 June 2010 02:55

Hi Corne

Any new pictures on your build

CoRn3 Wed 02 February 2011 07:38

OK, it's been a while...:o
Day job permitting, we're slowly getting back into the build. Some images to catch up:
Moving the B.A.T out to be sandblasted.
On the chassis bending machine to straighten her out.

CoRn3 Wed 02 February 2011 07:42

Finally moved her to our shop...

CoRn3 Wed 02 February 2011 07:48

The twins:
Love / hate relationships..... and some goodies!

CoRn3 Wed 02 February 2011 07:58

An example of the type of thing I hope to do on the machine: We built recessed frame cupboards, and needed an authentic English edge beading on it. Those familiar with the style will know it's a tall order. Pictured below is one of the joints, how it came out, and how it was done...

Gerald D Wed 02 February 2011 11:28

Bliksem! Daai ding is groot!

Kobus_Joubert Wed 02 February 2011 12:11

Ek stem saam.....Is that why you have a 4.5 kW spindle ?
Well done, glad it is coming together.

Travish Wed 02 February 2011 14:20

Wow! Looking Really Good. The size is impressive! Kepp the pictures coming.

hennie Wed 02 February 2011 22:47

Jy wil `n klomp kaste bou?Lyk goed.

CoRn3 Thu 03 February 2011 00:15

Thanks for the comments guys.

Kobus: did you get my message on the spindles?

Hennie: I'm not really rigged to do cupboards anymore, but I used to be in the bussiness. I built that kitchen for the guy who let me use his facilities and steel to build the machine frame. Manually cutting joints was a pain. Having a CNC machine would've saved me a LOT of time...

hennie Thu 03 February 2011 01:40


Kobus_Joubert Thu 03 February 2011 08:46

Thank's Corne, I suppose you refer to the message a while ago....because you were very quit for a long time.;)

CoRn3 Thu 03 February 2011 22:57

Hennie: I'm sure it'll pick up again. We also do granite; directly after the world cup, everything just came to a dead halt and it's only starting to pick up again now - hopefully your neck of the woods will follow soon.

Kobus: ja ja ja.... :o

CoRn3 Thu 03 February 2011 23:01

Oh, just in case anyone was wondering: shimming 150 holes sucks.

hennie Fri 04 February 2011 21:59

Jy gaan daai monster gebruik om graniet te sny?.Hy tel so bietjie op maar klomp horse trading wat aangaan.

CoRn3 Wed 09 February 2011 01:21

Sjoe, nee. Klip soek 'n heelwat frisser masjien!

hennie Wed 09 February 2011 01:42

the old school stone Massons didn`t chissel all at once bit by bit.:)

CoRn3 Thu 10 February 2011 06:08

New arrivals:

CoRn3 Fri 11 March 2011 04:44

For South African MM builders; I can recommend Greg (cncdirect) to anyone, very helpful guy!

Kobus_Joubert Fri 11 March 2011 05:12

We know...he sorts out Mach3 problems over the phone tjop tjop :p

CoRn3 Fri 18 March 2011 04:18

Levelling the rails:

I am sure most guys don't find this part to be too difficult; but given the length of our rails, there are a couple of hidden issues. There probably are easier ways, but this is how we did it:

As suggested somewhere on the forums, we built a “trolley” with a laser mounted on top, pointing at a white surface 10 meters away from the machine. The trolley's wheel centres are identical to the bolt spacing on the rails. We then record the position of the laser on the white surface for every space between the bolts.

Knowing the position of the first bolt, and the dot on the white surface, we can draw a corresponding line in CAD. The combination of these lines, gives us an accurate map of the rails' shape. It turns out that, despite my best efforts, the rails had a maximum deviation of 4.68mm - well within shimming distance though.

A nice way of mapping the laser's position, was setting up a camera in front of it on a tripod, and taking pictures of each position. I then superimposed the images over each other, and measured the distances from there - very accurate. From the CAD drawing, shimming sizes were simply measured and transferred to the machine.

It seems to have worked well, and this is the current state of affairs.

Next a strip of granite and an accurate level (used for wheel alignment) will be placed between the rails to level the second rail at the two ends, giving us a new datum to work from on that rail. Wash, rinse, repeat...

The first rail's horizontal straightness is set up conventionally with line and a magnifying glass, the second with a spacer, and finally the gantry's wheels and the magnifying glass.
In theory, the rails should be good by then...

Comments suggestions, and critique more than welcome.

CoRn3 Fri 18 March 2011 04:23

Oh, and there's some progress on the control box. I'm sure there might be some concerns for EMI, but let's see. :)

hennie Fri 18 March 2011 06:31

Corne wat gaan jy met daai monster sny?

isladelobos Fri 18 March 2011 06:38

EMI problems usually reside in the power supply pc

A quality power supply helps. You may be installed inside the power supply, a EMI filter.

In some cases, is best one 12v PC and the power is from one external PS.

CoRn3 Mon 21 March 2011 23:22

Hennie: Mainly moulds for truck parts, and whatever else I can find for it.

HomeMadeCnc Thu 24 March 2011 08:53

Nice job on your machine. Thats one beefy table big enough to run 2 gantries!


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