I answered some of your questions in my build thread. here is what i think for the other ones.
better would be some scrap plastic sheets from doors or whatever found at the Junk yard. And on top-sacrificial layer of expanded PVC plastic sheet. Quite cheap.
Also have in mind usual 1/8 bit is 10-30mm long, usual 1/4 bit is 20-40mm long, the piece that is not in the collet i mean.
Guest what?Today i start building
Here is my progress
It is too late now that i am writing
I will continue tomorrow
Thanks for your help
I edit the post in order to explain the photos
First of all i didnt get 6m long pieces. In order to lower the cost i choose for the lower base of the machine to go with pieces that a friend had.
Too rust but not as bad as it looks
Then i had to cut them. Good for me my friend has a big steel saw so it was easy
Bak to my home i start to make my "floor welding bench" by laying two 3,3m long pieces of steel.
I dry the rods in the oven
And i start by making the two big pieces 1,9m long as my machine has 1,9 length
The steel box section that i get from my friend pieces are 1,5 long so i had to weld them in order to make the 1,9m long that is the bigger piece.
Then i level my floor welding bench and i start
First i make the rectangular piece off the table try to keep everything square. Then i add the foot an the diagonal pieces
As i had read many times here in the forum i try to start with spot welding and not with big welding joints in order to avoid distortion. Firtsly that was easy but that make me think that the construction will have no distortion.
That was a mistake
After i finished the table ( lower part ) i realize while checking with an aluminium profile ( that supposed to be straight ) that the table has distortion issues
The following photo shows the aluminium profile when i check the diagonal from one corner to the oposite
It seems that the aluminium profile has 7mm distance from the table.
I use a jack in order to corect the bending but with no big success
Good for me i reaslize that the problem is at the midle of the table, as the 4 corner( lets name them 1 2 3 4) are all at the same level. I use a digital level. First i messure τηε gadient between corners 1-2 and i zero the level. Then i continue by messuring the relative gradient f between corners 2-3, 3-4, and the diagonals 1-3, 2-4. All the messurement show 0.0 gradient. Also 0.0 relative gradient i messure between the front and the back beam. That i s good as i can correct any mistake at the next steps (weld the upper 1,9m long beams where the rails will rest) before i apply epoxy.
Now i am waiting for the 6m long beams to contruct the rest of the table
The big problem till now is the weight of the table.
I can hardly turn it upside down
Tomorrow i will put a winch on the ceiling in order to deal with the weight that will be more than 300kgr ( without the gantry)
Thanks for your time
Last edited by ba99297; 17-07-2014 at 10:14 PM.The creative adult, is the child who survived
Looking good. Once you have the frame finished the build moves along quite quickly provided you keep it going. Try to order your materials in advance because it felt like I spent a lot of time waiting for things to arrive in the post.Spelling mistakes are not intentional, I only seem to see them some time after I've posted
This is the table so far ( the piece in the middle with be removed a little bit)
This is how it will be
#1 If you see the the top right photo you will see that i dont make a full welding pass just 3 spot ( edges and at the middle ) in order not to produce too much heat. Is that ok or should i weld all the way?
# 2 Do you think that more diagonal support will be needed and where?
Thank for your time
VagelisThe creative adult, is the child who survived
#1 I believe what is below the gantry and the gantry itself should be fully welded. Anyways later you will epoxy it for leveling. I spot welded only the Z which seemed strong enough/on my build i mean/
# 2 To me it seems there would be no need, especially with your monstrous table bed
#2 I think you could do with some triangulation horizontally to stop twisting but apart room that it's looking good!Neil...
By ba99297 in forum DIY Router Build LogsReplies: 12Last Post: 03-09-2013, 09:37 PM
By cncJim in forum Marketplace DiscussionReplies: 2Last Post: 19-06-2013, 07:58 PM
By PWD in forum Milling Machines, Builds & ConversionsReplies: 4Last Post: 22-05-2012, 10:02 AM
By C.AlveSilva in forum Gantry/Router Machines & BuildingReplies: 11Last Post: 01-05-2012, 01:03 PM
WANTED: adjustable tailstockBy johngoodrich in forum Items WantedReplies: 0Last Post: 29-03-2012, 06:38 PM