Titivating A CNC Plasma Table

The Craftmans Shop > New from Old

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awemawson:
Thanks Rob.

Today I attacked the problem of driving the extractor fan from the MACH-3 program with some help from folks on the MYCNCUK.COM forum - thread is here:

http://www.mycncuk.com/threads/10490-MACH3-Plasma-help-please

After a few blind alleys I found my way through the maze, and now can control the fan either by G codes or by an on screen button :ddb:

To clebrate, I thought I'd have a go at tidying the 12" ducting on the fan. The basic issue is that the 'suck' end of the fan has a flare making it too large to comfortably slide the flexible ducting over. I'd intended to buy larger ducting, but it's mighty expensive, so I decided to roll up a sleeve to fit inside the flare thus presenting a parallel 12" pipe.

As the fan had a grille fixed with four clips I decided to re-use it and have the sleeve fixed by the same bolts. Worked out very well and makes a far neater job of the ducting :clap:

AdeV:
Tidy job as usual Andrew, but, no JCB yellow paint? :scratch: :lol:

Quick unrelated question - what's that "green graph paper" desk cover thing you've got, and where does one obtain such a thing?

awemawson:
Thanks Ade - no yellow, but it does have Ford Tractor Blue appearing everywhere I've been :lol:

Cutting mats abound in my usual department store (eBay :clap:)

An example:

http://www.ebay.co.uk/itm/Babz-A3-30-X-450MM-NON-SLIP-CUT-CUTTING-MAT-BOARD-ART-CRAFT-Babz-Media-Ltd-/152381802475?hash=item237aa9c7eb:g:hfIAAOSw241YbBGn

awemawson:
I've been twiddling my thumbs waiting for a relay to arrive to use for E-STOP. This gave me a bit of cogitation time, and I came to the conclusion that I just HAD to sort out the wonky belt covers that were installed. :bugeye:

It's one of those things that don't need to be done, but as they are they look tacky :(

awemawson:
Now looking to see how to mount more satisfactory covers opened a whole bag of worms :bugeye:

It tuns out that the HIWIN rail sliders, which each mount with four screws, all have two screws missing, and more to the point, the holes drilled for them are in the wrong place :bang: It's almost as though the gantry assembly was originally on a different sized rail with different sliders :med: Now all it needs is holes drilling in the mounting plate in the correct locations, but realistically this involves dismantling the gantry - something I don't really want to do :scratch:

The HIWIN sliders have ports to mount grease nipples but none are fitted - not sure if they should be in this application - comments welcomed :scratch:

And even worse when looking at the Z ballscrew lower bearing it is at a significant angle - certainly not mounted perpendicular to the shaft, but it turns smoothly - I can only assume it is a spherical self aligning jobby - I'll have to dismantle it and find out - looking upwards from the bed using a mirror, of the four mounting screws, three are missing :bang: :bang:

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