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Old 05-03-2017, 08:57 PM   #21
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Looking Good!


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Old 05-06-2017, 08:19 PM   #22
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Wow you are well on your way!!! Looks better than expected, you should end up with a very usable table.


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Old 05-19-2017, 02:26 PM   #23
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Thx guys .

Had some spare time today , so I continued working on the plate .

This whole router idea started when I got hold of this litle cast frame .
It was part of a larger autosampler machine , and as soon as I held it in my hands I thougt
cnc router .
I've already welded track supports to the sides and machined them .


This frame iis where the t-slot plate is supposed to go .
The base was drilled and tapped , and I pressed in two dowel pins to locate the plate to the base .

The accuracy of the dro will never cease to amaze me .
Two dowel pins , drilled on opposite corners in the base and pressed in .
roughly 500 mm(20") apart .
Drilled thesame two holes in the plate , same drill same press fit .
And they just allign up perfectly .
A gentle tap with the palm of my hand and it almost "clicks" together .
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Old 05-19-2017, 02:31 PM   #24
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Then I machined the t-slots .

First the centre section with a 10mm endmill .
Then the actual t slots .

Quite an operation , because I wanted M8 slots , but all I have is an M6 cutter .
So each slot took 3 passes with the little cutter .
One in the centre , and one for each end .

But it all turned out very well .
The cutter didn't brake .

A final pass in the centre with a 45 chamfer finishes the work .
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Old 05-19-2017, 02:32 PM   #25
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The t-slot plate on the base , and the pattern, that was made to cast it .

These pictures also show the lineair rails on wich eventually the gantry wil ride .

I must say that I have some porosities in the casting .
Nothing to dramatic , and it'll work for this application , but I guess in the future I'll need to degas more .
I did degas but apparantly not enough .
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Old 05-19-2017, 02:39 PM   #26
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Job done , time to clean up the mill .

Why does milling always make such a mess .
Chips flying all over the place , tools everywhere ...


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