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hi peter i didnt understand you ,do you have any video demonstrating how to make a good lap and thanks

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All this thanks to your valuable guidance and advice, Peter. Thank you very much

Hi Peter
Here is a photo of the welded frame
I added 8 cross member to it
And yes for sure i will machined the land after finish welding
Take a look

Hello Peter
Would you please advise me regarding the foots count of the machine? I have some piecs of shs 90mm left and I want to add them as an extra foots to make the machine eight foots instead...

hi peter i dont mean i need space to put the drive between the rail
i mean a 120mm shs is narrow to put two linear rail in the same face.
Regarding 150mm x120mm shs section, I searched for it...

hello peter
based on your idea i come up with this gantry design showen in the pictures attacehed


what you think

hi peter looking great and well done
but in my case i dont think i could install the rails in the manner like you did
the space between the rails will be narrow for 120mm shs,i am using the square...

hi peter and thanks
Now that I am convinced to use 120x5mm shs as a gantry ,
Which confuses me now is how to install the linear rail ,top bottom,in the same face or as 90 degree as shown in the...

hello jaquare and thanks for your reply
the 120mm shs thickness is 5mm and the shs 90 i own already is 3mm

hi all
iam about fo finish my cnc router frame build,but now iam stucked in the gantry
I am now faced with two options
usign :
1- one shs square tube 120mm
or
2- two shs squaretube 90mm ...

Hi peter
He is brazing
Could I down the size of 120shs to 100mm ?

hi alls
The updated design is attached in the photo
As for welding, I'm not good at it,
I have a friend who will do this and he has done it for years,
he is using gas for welding

hi peter and thanks
yes the flat bar will be used to mount the rails and rack.
but i asked if using 5mm thick tube, no need to use an additional flat bar,all I have to do is machining the SHS...

HI CRAIG and thank
i have HGR20 linear i think it need m5 bolt so 5mm tube wall thikness is enough?

Hi Peter and thank you
The frame will be brazed.
As I understood you I should use 120x5mm square tube and no need to add the extra flat bar,also add two legs in the middle with another...

hi peter and thanks
You convinced me, and I also couldn't find the steel in the size I designed the frame with. The supplier told me they have stopped manufacturing it entirely.
Currently...

hi and thanks you all
-bolting the frame togother,and surface's grinding all SHS sections
i saw some industial machine weld the frame togother then weld a thick steel bar in the side to mount rail...

hi peter
-Yes, I want to use the big red tube as legs for the machine to facilitate the process of assembling the machine ,because
those tubes are heavy and will not move during assembly and use...

Hi
I made a mistake
The big red tube is 200x150 mm not 200x100
As I mentioned in the images,sorry

hi petter and thanks

-I down the size of the red tube to 200 x 150 mm. In my humble opinion , the machine should be kept high off the floor as well.
Going less than this size makes the machine...

Thank you, Peter. As a beginner, I have learned a lot from you. You always give us your valuable information
following your sugestion :
- Each part is laid on top of the other part beginning by the...

hi peter
did not undestand you

hi craig
but how do i bolt the crossmember part toth side sections ?

HI
After reading all the comments above and taking into consideration the suggestions provided
I came up with this design in the pictures attached below
it aslo reduce the qty of steel used and...

Hi jaguare,thanks you for your reply
-the cnc i am going to build it would be used primarly as a router for wood ,plastic and aluminium or maybe as a plasma cutter,didnt decided yet ,i wanna make...

hello guys
i wanna your opinions and suggestions for this cnc frame base in the picture attached bellow

i think installing rail on side or have them under an edge or other shielding that stops chips from landing directly on the rails.


Why did I choose to build the device myself and not purchase a...

Hi,
channels are not particularly stiff in torsion. I rather suspect even a 100x100x4 SHS would be stiffer than a channel, even if the channel was twice or even three times
as thick. Tubular...

hi peter
whats your opinionin this design
seem using 100x3mm square tube for framebuilding and thick steel c beam for mounting motion parts
here is a link to it...

hi peter
Hi Ben - I think your using 20mm rails? So they would have a M5 screw. M5 nuts are 4.7mm thick so I'd use 5mm (or 6mm) strip so the thread was deep enough.
didnt understand you chamfer...