For sealing MDF I have used satin poly unless you want it real slick and shiny. But poly will seal it well pretty well.
this is my second machine, the original one got destroyed, about two weeks ago, ( the machine un-sealed mdf was left too close to an open garage door, and got rained on , when I returned home about 6 hours later well .....all I can say is Un-sealed MDF + Water = Scrap ) A freind cut the bearing grooves, with a dado blade on the first machine and I did not want to bug him again, So with my new freinds here at routerforums and a new table router I will have nice half round grooves to fit the bearings perfect, sealed mdf and made by me, I use Xylotex motors and controller $475 and Mach3 control software (still using the free demo) the cnc controllers use the computer printer port . if you look at their link page look at cnczone you will see many that have made one, bearings. guide rods, 3/4" mdf cost me around $75 their cost estimate is very close, my controller was the more expensive model, there are some at half the price, but require assembly, it rained here a couple of weeks ago, and this week it's freezing cold and snowing !Joe Lyddon said:I was thinking that shellac would work... (never have put shellac on MDF)... ??
How close are you from having the machine done?
How do you connect it to a PC? USB? RS232?
What software are you using & controller... Cost?
You could do the same thing as that Carveright machine... Well, almost...
Looks like a super COOL project!!
I looked at that CNC site you gave... That is just Awesome how you can make that machine!! I don't believe the total cost that they said though... probably a lot more.
I looked at their Concrete Molds too... would take a long time to make enough pavers for a driveway!! I wonder how long it takes to cure one set of blocks? (at least a day?)... Interesting... to look at... and dream a little...
Can you show us your progress so far?
That quote about shellac sounds familar. I certainly agree that it is almost a universal sealer.Mike said:Mac, the universal best sealer before applying any finish is shellac. It will stick to just about anything, the going joke is it sticks to peanut butter. You may be familiar with a brand of white pigmented shellac; it is called Kilz. This is the product I would use since you will most likely want to apply a color finish. This is your unique opportunity to choose your own special color for tools that you build. We all know Makita Green, DeWalt Yellow, Freud Red... Perhaps Mac Tartan?
With all the 2 cents I am getting I will be rich in no time at all , my main problem was, I did not consider any sealer at all, and thats what killed my machine, I will give your method a try too, as well as the other methods the guys have shared with me, you are correct about the edges, mdf is really like a sponge, you should have seen my machine after the rain storm, it was puffed out like a marshmello but I really like using mdf for this machine I am re-making, it's very accurate and straight stuff (when dry)cbsjoez1935 said:Hi Mac,
Welcome aboard. I do not have the massive expertise that the majority of forum participants have, but I will throw in my two cents anyway. Have you considered a 5 or 10 to 1 mix of wood glue and water to seal up those edges? (careful on the amount you put on at one time). That MDF is one big sponge.
Hi Bjbobj3 said:Hi Mac
I didn't see the bronze bushing till just now , that should work
Can you PLEASE post a picture or two of what you have made with it
I sure like the way you have your show and tell setup on the web page you did a great job on that
I sure would like to see a helix,and some 3d stuff
I'm not the sharpest nail in the box but I think I would like to make one also.
Thanks for all the info so far and keep on posting
Pictures are worth 1000 words.
Yes this is my second machine, the first one got soaked with rain and was ruined, it was left too close to an open garage door and we had a heavy rain storm about two weeks ago, if time permits I will do a step by step show and tell, if anyone is interested. is there a dedicated forum here to post users projects? I like Norm too since we moved to the country (satelite) I never get to see his shows anymore are they new shows or re-runs ?bobj3 said:Hi Mac
You said,,▼ did I miss read that one ?
"the one I made from mdf was running without any issues for almost a year"
Norm is still on PBS all the time, about 6 times per. week on channel 12 (Comcast/Colorado) I copy just about all his shows(DVD) I like Norm also
I don't think Norm makes most of the projects he has people set it up,clean it up,do it up, etc. that's what it looks like... no saw dust anywhere in the stage shop at anytime. look at his hands next time or to say at his finger nails.
But they do put on a great show
Please post a step by step on your machine.
macg said:Yes this is my second machine, the first one got soaked with rain and was ruined, it was left too close to an open garage door and we had a heavy rain storm about two weeks ago, if time permits I will do a step by step show and tell, if anyone is interested. is there a dedicated forum here to post users projects? I like Norm too since we moved to the country (satelite) I never get to see his shows anymore are they new shows or re-runs ?