i've read somewhere on here that some poeple use a square tool and clamp it down and run a router with a end mill along it taking just a 0.1mm at a time or less.

 

Thanks Darathy. I'm trying to picture this in my head. So the end-mill would need to have at least 20mm of cutting length (for 20mm extrusion) and the router would be guided by a clamped engineer's square. I'm really new to all of this but it sounds like a good approach. I'll try to set something up tonight using wood at first. I'll need to pick up an end-mill beforehand.

 

Yes thats the way

 

Hmm
Its been a week since i ordered my c-beam kit and it hasn't shipped yet , no worries i thought due to the holidays and all. Little did i know that you could order this kit from Europe which would save me a lot of money ( Toll customs , Freight , and Time ). The fault is 100% on my part for not doing enough research but if the us store would refund me OR send my machine i would be really happy.

 

Has anyone tried the 1000 x 1000 C-Beam XL as mentioned here? We are getting ready to move forward with building this machine but could use the extra cutting area if there are no problems with the extension. Thanks!

 

I am still in the process of building a standard size one but could not see much of an issue with upgrading the table to run on 1000mm Cbeam. I would however then maybe look at running two full carriage assembled on each table linear actuators (4 in total on the table axis) and then making an adjustable spacing pattern on the spoil board so you can test out different separation distance.

The wider the separation the better the axis rigidity BUT this comes at a cost to the axis travel. IMHO I do not see one carriage assembly per actuator being able to accurately hold a 400mm span hanging off each side unsupported while achieving good acceleration.

Sadly the more you build CNC the more you come to learn it is more an art of finely balancing the may trade offs as often making improvements in one area will rob you of performance in others OR rob you of any cash you may have in your wallet

 

order placed , managed to snatch one during the black Friday sale.

ordered the xpro as a controller board.

need some advice

1-pwm or VFD spindle.

2-can the xpro control the VFD (start/ stop/ speed )

3-which spindle do you recommend for this build , my main focus is wood and carbon fiber

 

thx kyo,

the water cooled ones are AC/3 phase type.
they have an external control unit, which i'm not clear on how to connect to the xpro / GRBL
do they use pwm or other type of serial com ?

do you recommend one , which is known to work with GRBL ,

thx again

 

OMG , "kyo" loool

thx Moag again

went through the PDF and that helped.

will keep looking on how to interface

 

Is this design suitable for upsizing a bit further for a 1200x500mm cut area? I need something with a bit more height in the Z so I can get an manual indexing head beneath it as well (prob around 300mm from the spoil board). Sorry for the Q, Im new to all this

 

Thanks, im not just after gunstocks. I am trying to con up with a machine that will do your typical routing of ply etc but be suitable for some gunstock work as well.

There link you have provided really has some food for thought though, doubling up some of the supports and changing it to C channel for lead screws on the X could be interesting, and i imagine strong

 

Yeah. Been looking at 12mm screws for the gantry. I need to get some software so i can see how it calibrates for the different pitch etc. I need something visual as i cant visualise it in my head

 

something like this with a high Z and strengthened sides would work? I would fill in the frame with aluminum plate with a Perspex window in it for strength and controlling the mess

 

Making a router. Thanks for that info =D

 

A slight variation on the XL using 3 1000mm c-beams.

 

I was looking at what would be required for this, and the pricing looks pretty close. Extend the two linear actuators (going by the retail store pricing, I think the difference is $8US per), some extrusion ($15US total, IIRC) and voila! And since you're extending an already-overbuilt axis (as far as rigidity goes), I wouldn't be too worried about loss of accuracy. I'd be "in" for an XXL variant, for sure!

 

Is this the moving bridge/stationary table? That would be slick!

 

Yes it is.

 

Thanks. But there will definitely be much "more"

 

Hi guys,

I'm just about to finish the mechanical bit of my XLarge and as I went along I noticed some things I would like to upgrade, like switching the two 20x60x500 to c-beams for 20mm more Z -height, and build a table from 20x80 v-slot instead of MDF.

However, my main issue is the deflection on Z/X. This is me pressing on top of the spindle motor,

I've been thinking about how to stiffen the X C-beam without changing the gantrys, but nothing really makes sense. I saw one build in the gallery that uses double c-beams joined together, but that means you have to extend the screws for the wheels (using threaded rods instead) and that creates new problems like mounting the Z-gantry.

There is some space on the "inside" of the c-beam to add material, like L-shaped stainless steel or U-shaped aluminum. But the maximum material thickness is about 3mm to clear the acme blocks. Is that really going to make any difference?

Any ideas out there?