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Bed levelling

err surface grinding....

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jason udall07/03/2015 10:45:05
2032 forum posts
41 photos
Bed levelling the next printer...
jason udall07/03/2015 11:03:28
2032 forum posts
41 photos

20150228_162758_2480.jpg20150228_162758_2480.jpg

jason udall07/03/2015 11:04:32
2032 forum posts
41 photos

You know..one day I might get the hang of this forum software

Muzzer07/03/2015 11:32:56
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2904 forum posts
448 photos

Looks as if you are using the table drive to self-machine the top surface with an angle grinder. Presumably you also find the grit tightens up the various linear bearings, ballscrews etc?

Looks like quite a beast - what are the dimensions of the working envelope. Can you tell us a bit about it - what drives it etc?

Murray

jason udall07/03/2015 20:51:41
2032 forum posts
41 photos
As to grind dust.
Angle grinders dont "shed"..they do wear but not significantly on this duty.. ( I know since I dressed wheel..A first on an angle grinder ... and checked wheel during process . Pointless if wheel wore significantly..)

Now the ground down al..
Well as you know the stuff burns in air..so the dust. (What could be found on machine) . was very fine.

THE machine was degreased after..and the wipe cloths checked ( I too was concerned and interested. .)

Well either all the swarf burnt or blew away ..and no grit found.

The recirculating balls were blown dry.
And re greased ( oil really).

It is not maybe the proper technique but the clean up found no contamination. .and no trouble.

jason udall07/03/2015 20:59:01
2032 forum posts
41 photos
The drives.
Size 27.
5 amp 48 volt. Micro stepper drives from cnc4you.
.
Superb drives at around 30 quid
And same for the 4 Nm motors..again 30 odd quid
The xy lead screws are 20mm lead 20 mm dia
The guide rails are 20 mm
The x axis uses two motors each with 2 mm 20 mm leads...

The print envelope is 400 x 400 x400..
Travels currently being optimised but print speeds at 50 mm/min.
Depositing 25 mm cube/sec
Neil Wyatt08/03/2015 15:26:42
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19226 forum posts
749 photos
86 articles

> the stuff burns in air

To form little bits of aluminium oxide...

Neil

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