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I'm at a total loss now in this portion of my journey with the fabrication of my CNC and am seeking some reassurance in the direction I'm lost at...
Let's talk Cable Drag Chain for a moment...
The...

Thank You Guys for this information
Pete
16mm screws is Ok at that length but at the limit depending on the speed needed. With a reasonable speed they should be fine agreeded but if they run at the...

I want to say first off; I am no expert on all the CNC building process, hence the reason I have asked the various questions which maybe repeated with others asking the same , asking those questions...

Thanks Pippin for the vote of confidence!
The Ball Screw size are the SFU2010 working in conjunction with the HGW20CC Rails and Carriages...X2 of course or at least in this design and build...
Paul

I am building a CNC and am up to the gantry and have it fabricated...One thing I was aware of at time I fab'ed it was the way it was to be fabricated...I have secured 2 each 3 x 2-.188 wall steel...

I am needing to order the final parts for my build and have be concerned about the length of the ball screws and linear rails I need to get...
So, I have wondered if there is a general rule of thumb...

FWIW I have converted the table you are referencing over to accept Ball Screws on both axis...I have 0 back lash on mine and is very responsive when I move the round handles around...It is true...

Great break down for us laymen to comprehend...
Thanks
Paul

Thank You Pippin
So let me understand this and gather my feeble little brain around what you just explained...
With my scenario in original post
12 x 12 x 1/4" thick Hot Rolled steel = 12 x 12 x...

I Have read where there were some information/conversations out there as to the steel vs. aluminum materials in strength...
I was curious if I had a 12" x 12" x 1/4" thick piece of hot rolled steel,...

Thanks guys
Appreciate this info
Paul

Not to keep beating a dead horse but can we discuss ball screw length one more time?
If the ball screw is advertised as 1000mm does that mean the threaded portion to be 1000mm?
So, with the BK/BF...

guys this is great news since I have a source of getting a set of 30's relatively reasonable...

Let me ask this if I may would getting the 30's be an over kill for a 36x24 hobbyist machine? if the...

If that's your machine above that is a beautiful work of art...You got some skills
I have nothing to add to this conversation other than what I stated...
Paul

I have stumbled upon several various sets of linear rails by different Mfgs. that has come on the market reasonably priced...
These Mfgs. include THK and Rexroth along with NSK
Are the THK as good...

let me say I have not built a CNC at this time however it is definitely on my Tado list...
It seems that most of the Guys that has expressed the design and build of their units spaced the rails 6"...

Very well done...
Did I read where all you were able to achieve was .005 between the plane of the linear rails? I am envisioning this method for my build , but I was thinking something a whole lot...

here are a few I had saved when I was considering the T extrusion...
Hope it's helpful......

It would seem I have a lot to contemplate...On the next step in which direction to take this Project to... Concrete, E/G, Grout, Steel, Wood or Concrete/Grout with steel structure internally or Steel...

perhaps one last question for the moment...I have started the design process or at least trying to envision some of the largest parts of the build...One question that has arose is whether to use...

So I went to those links you supplied, and I did see they were identified in the c5 and c3 just as described and out of curiosity I asked for linear rails and blocks...When the link came up I did not...

Thank You...Very informative...
Paul

Ardenum could you take a moment and enlighten me on C7, C5, and C3
I have entertained going with the larger T extrusion and filling the various cavitys with E/G, however it has been suggested to...

This was one of the DIY CNC's that is very appealing in which I stumbled upon...Reini did a very nice job into this unit trying to cover all his bases...
https://www.youtube.com/watch?v=I1tHSS4PN5Y...

Ardendum my thoughts for leaning this direction was not that is was going to be heavy but my thoughts were the heavier the better so at this moment I'm not concerned about the weight...I do concur...

Pete Its seems like everything is Costly this time around...I expect it to improve soon...Not soon enough for this project unless I put it on hold another year...(which at my rate is possible)
The...

Pete Thank You for the continuing education with the formulas you have supplied to this conversation...I some cases Its out of my realm to comprehend in all fairness, but, these last couple drawings...

Hello Peter Hello Ardendum...

Hi Paul - This is what I have learnt in building 5 routers:
1) The high rail design is considerably stiffer than a column design..It also contains dust much better...

Well Peter As You may recall I wanted to build a steel framed base sometime last time we spoke...Some would have to be welded which would have applied to much heat to the frame then with the stress...

Peter
Just got off the phone with Sika inquiring about the Ultra and the 3350 here in the states...According to him You guys are the only ones to have this product available to the consumer...He did...