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  1. #81
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    Default Re: Gully's new 3x3 steel CNC router build

    Happy new year to you all. 1st post from me for 2021
    Had time this long weekend to start making up the side paneling and top base from MDF.
    Not much to show for 2 days of toil, but progress is progress. Should look good with a coat of paint
    Gully's new 3x3 steel CNC router build-img_0961-jpg Gully's new 3x3 steel CNC router build-img_0962-jpg
    The bump out in the front is removable and fills in the space that a small rotary axis will eventually go. Till then the bump out gives me 80mm extra cut area on the Y axis

    Control box build is next cab off the rank it will attach along the left hand side, sort of like this. Still working on final sizing's and parts placement

    Gully's new 3x3 steel CNC router build-control-box-prelim-jpg


    Gully

    Striving for medeocrity..and achieving high scores!


  2. #82
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    Default Re: Gully's new 3x3 steel CNC router build

    Haven't had a lot of time available to work on the CNC.
    Have finally managed to get stock to build the control box, so will start on that next
    In the mean time I have just been doing all the 1 percenters and tidying up the parts that have been completed by painting and final fitting them
    Gully's new 3x3 steel CNC router build-img_0965-jpg Gully's new 3x3 steel CNC router build-img_0963-jpg

    more soon

    Gully

    Striving for medeocrity..and achieving high scores!


  3. #83
    Community Moderator ger21's Avatar
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    Default Re: Gully's new 3x3 steel CNC router build

    What's your paint process for MDF? Hands down the best finish I've seen.

    Gerry

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  4. #84
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    Default Re: Gully's new 3x3 steel CNC router build

    Hi Gerry,
    Thanks for the compliment.
    Still using the old tried and true method that I used on my Joe's
    I have cut and pasted the how too from that thread. It's really all in the prep work.

    Secrets to getting a great finish on MDF. Spray paint it or use a good quality roller with the following methods to suit.

    1: Skim the cut edges with a filler. I just use a pollyfiller skim coat type material and when dry sand it back well with a block (this is important as it fills out the little dips that router cutting leaves)

    2: Seal the edges properly. There are a couple of ways to do this, I spray mine with a MDF clear high build sealer Its a commercial product used in furniture making to fill out grains, seal edges etc. The other option is to use a hi build easy sand acrylic undercoat and brush or roll it onto the edge then sand smooth.

    3: One coat of sealer is not enough refer back to step 2 and repeat until sealed

    4: Now prep everything and undercoat entire piece using above methods and /or materials and sand properly when dry.

    5: Apply top coats

    6: stand back , drink beer and admire your professional looking paint finish

    It never fails to look good

    Gully

    Striving for medeocrity..and achieving high scores!


  5. #85
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    Default Re: Gully's new 3x3 steel CNC router build

    Hi Gully - As you say good paint is prep prep prep... Have you tried white PVA glue diluted 1:1 with water as a sander sealer? I use it a lot. Its sort of like shellac, I apply with a rag not a brush. Just a thin coat if the surface is wet its done.... Will take a 2-3 coats to "level" but you can do lots of coats quick. If the surface is dry to touch can apply next coat. Once level or "filled" as the polishers say then you can undercoat etc. can even continue and use PVA as varnish will keep building to whatever depth you want. Not good outdoors. I have used some brands for outdoor signs and they have failed yet some brands are fine in the wet.. Haven't figured that out yet.... but indoors PVA is cheap prep..

    Your clue about using a block is a good one, quality sanding should never be done with fingers!! Peter



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    Default Re: Gully's new 3x3 steel CNC router build

    Looks a million dollars Gully. Nice one.



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    Default Re: Gully's new 3x3 steel CNC router build

    Hi Pete,
    Your showing your age now.
    As a kid building control line planes I would use that to seal and stick light brown paper to the balsa (couldn't afford dope or tissue back then)
    Kind of reminds me of my lack build budget now.

    Never thought to use it as an MDF sealer. Iv'e clearly been spoilt with all the modern alternatives during my working life.
    I will give it a go as the cost would be way lower than using sanding sealer. Plus it will remind me of my youth.

    Thanks.

    Gully

    Striving for medeocrity..and achieving high scores!


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    Default Re: Gully's new 3x3 steel CNC router build

    Hi Gully - I suppose you were down the back of the class eating the Perkins Paste as well Perkins paste is PVA glue in some sort of carrier. Generally has "non toxic" on it. One of the only glues that is non toxic... unless you go way back to animal glues...peter



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    Default Re: Gully's new 3x3 steel CNC router build

    Laugh.
    If it is the same as clag, I will plead I didnt know any better at the time

    Gully

    Striving for medeocrity..and achieving high scores!


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    Default Re: Gully's new 3x3 steel CNC router build

    Hi Gully and peers - Seems Clag and Perkins were originally made from potato starch but later on moved to PVA. Cheers Peter

    Attached Thumbnails Attached Thumbnails Gully's new 3x3 steel CNC router build-perkins-paste-jpg   Gully's new 3x3 steel CNC router build-clag-jpg  


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    Default Re: Gully's new 3x3 steel CNC router build

    Son in law came through this week with the stepper end covers.
    He only proof printed them in a low resolution to confirm fit etc.
    Good job he did as I needed to make a small mod to get them to fit properly. Will make the appropriate changes to the file so he can finish print them
    But as they say, why wait for the good set to arrive when you can work with what you have.
    Gully's new 3x3 steel CNC router build-g2-jpg Gully's new 3x3 steel CNC router build-g3-jpg

    Gully

    Striving for medeocrity..and achieving high scores!


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    Default Re: Gully's new 3x3 steel CNC router build

    On holidays now, so finally had time to build the control cabinet
    Still need to make the doors, but its painted and fitted. I have most of the electronic kit sitting in my office
    but still need to order a smooth stepper so I can move to a modern PC set up
    Gully's new 3x3 steel CNC router build-control-cabinet-jpg

    Getting closer

    Gully

    Striving for medeocrity..and achieving high scores!


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    Default Re: Gully's new 3x3 steel CNC router build

    Looking good Gully - but only 4 things on the todo list? Must be close to the end. Peter



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    Default Re: Gully's new 3x3 steel CNC router build

    Hi Pete.
    Wish it was only 4 things on the to do list. Still estimating mid year for it to be working in some form.

    Wifey also has a to do list for around the house while I'm on leave. It is longer than my CNC to do list

    Gully

    Striving for medeocrity..and achieving high scores!


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    Default Re: Gully's new 3x3 steel CNC router build

    Hi all
    Have finished building and painting the control cabinet, but cant get out to pick up my slotted duct due to yet another covid lockdown here in Victoria
    Cant do much more until I can get out and about again
    Gully's new 3x3 steel CNC router build-img_0971-jpg Gully's new 3x3 steel CNC router build-img_0972-jpg

    Gully

    Striving for medeocrity..and achieving high scores!


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    Default Re: Gully's new 3x3 steel CNC router build

    Well that was 8 hrs of my life spent chasing bees d@#ks that I wont ever get back.
    This Gully's new 3x3 steel CNC router build-shim-stock-jpg Plus this Gully's new 3x3 steel CNC router build-img_0975-jpg

    Thought it was time to bite the bullet and tram and shim the rails as required while it was still relatively easy to access the adjustment points
    Manged to get 90% of the rails along their length to have a variance from 0 at both ends to less than + .05mm, A few spots ran out to just over +.06mm which is
    a way better than I will ever need, and in another universe compared to my Joe's
    Still haven't manged to get the slotted duct for the control box yet, but I'm on to it

    Gully

    Striving for medeocrity..and achieving high scores!


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    Default Re: Gully's new 3x3 steel CNC router build

    Let me know your duct source. Tro-Pacific has it but they sell it in a box containing 12 x 2 metre lengths. Price is not too bad unless you go for 3" high
    https://www.tro-pacific.com/products...on-qty-12-grey

    Rod Webster
    www.vmn.com.au


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    Default Re: Gully's new 3x3 steel CNC router build

    Hi Rod
    Trying a new electrical wholesaler tradezone.com.au as they have what I want in stock

    Gully

    Striving for medeocrity..and achieving high scores!


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    Default Re: Gully's new 3x3 steel CNC router build

    Finally pulled the finger out and picked up the slotted duct.
    To celebrate the occasion, today I banged in all the AC side of the electrics
    Gully's new 3x3 steel CNC router build-ac1-jpg Gully's new 3x3 steel CNC router build-ac2-jpg
    Have tested it for correct switching, continuity, insulation and resistance and all is good so will be happy to power it up.
    Just need to fit some din rail end stops to keep all the connectors together properly.
    DC stuff next

    Gully

    Striving for medeocrity..and achieving high scores!


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