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Happy Hunting archie =) =) =) |
http://www.norbord.com/MDF_PS_Thickness.htm
MDF in sizes up to 5' x 18' pre-cut studs are 92 5/8 with 2 top plates and one bottom for an 8' wall (actually 8' 1-1/8" tall) |
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Typical Argentina Sizes (mm):
MDF: 2600x1830 Melamine: 3050x1080 Chipboard: 2820x1830 and 2750x1830 (Aglomerado) Fenolic Plywood: 2440x1220 (Multilaminados Fenolicos) Ureic Plywood: 2200x1600 (Multilaminados Ureicos) Source: http://www.sacheco.com.ar The prices in this site are in pesos, today exchange rate: 3 pesos=1 USD Pablo |
How much 'extra' width needs to be added to do 2 heads instead of one and be
able to cut the entire desired width? I am in the US, and would like to be able to cut 49 or 50" wide material, but to get both heads to cover the entire width. Thanks, Jack |
I'll take a quick crack at that; someone will correct me if I mess up.
Two heads mounted in the same car, or two cars? For two cars, add the entirety of the car width, so about 17.5". If you plan to mount two spiders in the same car, then it depends on how you mount them; you need to add the distance between the centers of the spindles/routers, plus the diameters of the largest cutters you will have in simultaneous use. As a working approximation, the centers will be 7-10" apart, plus two 1/2" cutters, and you've got between 8" and 11" of extra needed. But don't take my word for it, spend some time with the drawings until the visualization pops into your head. It'll be well worth it when you're doing the build. |
Brad, you got it about right (except for adding cutter allowances - they are there already).
Two gantries on one table (add about 850mm to table length -), each with two y-cars (add 450mm to gantry length/table width), each with two z-slides (add about 240mm to table length) will give you 8 tools on the same table! :D . . . but you may end up with 24 motors/geckos :( The z-slide was designed so that 2 of them will go into the Y-car, back-to-back. If going that route, you will have the following challenges: - dust hose route - maybe a second motor on the back of the y-car for heavy duty cutting on the "back" z-axis, which raises its own challenge: - rerouting the y- cable chain, or getting the cable chain to wrap around the second y-motor. |
Doesn't two z-slides add to gantry length/table width, not table length?
Wouldn't 8 tools be 2 (x1) + 2 (x2) + 4(y1,y2,y3,y4) + 8(z1,...z8) = 16 motors (20 if you double up on the Y cars)? Heck, that's only four or five G540s ;) Or is this an indication that you're dreaming up a mobile hexapod mounted on six articulated legs?:D |
Brad,
I think Gerald meant if you had two gantries, you would have to add to the table length so that one gantry can be out of the way so the first gantry can access all of the cutting area. Two Y cars would have to add to table width (or Y axis) so that both Y cars would be able to access all of the cutting area as well. So if you have two gantries each with two y cars, then you would have to allow extra width (y axis) and length (x axis) to allow all the cutting tools access to all of the cutting area. Did I get it right Gerald? This sounds like an interesting machine. I guess you would not have to change tools very often. Dust collection would be a nightmare though. :eek: |
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Brad, your arithmetic is better than mine . . . yup, not too many motors :)
That's right Heath, every extra tool needs more rail length to get the other tools out of the way. |
Thanks for the picture, I missed a 90 degree turn in my visualization of where the twin Z axis go.
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MechMate Mini?
Gerald,
I was wondering if you went anywhere with this further than just contemplating. A 50" wide (to accommodate US MDF) cutting area gantry that could be used on a 'small' table could be very interesting. I assume the Gantry and Z would be the same, or were you contemplating come modifications there? Quote:
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I've built the parts, but must still get around to the installation. The gantry and all the moving parts are standard. The short table will be entirely wall-mounted and extend partly over the hood of my parked car in my home garage.
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Table Size
Hello all, I am at the planning stage of building a MM for plywood and solid surface cutting. I'm a bit confused about what lengths to apply to the X and Y dimensions in the plans. Here in the US, 4x8 up to 4x12 is the standard size for plywood, and solid surface comes in 30"x12' sizes. I would like to size the Y to be able to handle 5'. Does this mean I use 68" for the Y measurement and 144" for the X measurement in the drawings? For example, in drawing 10 10 240 (steel x-rail) the measurement is X + 8.1" between stop blocks. If I use 144" for the X variable, will this allow me to make a full 12' cut? Or should I oversize the X variable (as well as the Y variable)?
Steve E. (aka newbie) |
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Hello!
My name is svein (some call me mr seven) and live in Norway. Sorry my English is not good. Thanks for this router forum and part list! Geral D I work with CNC machines and produces tools. I will build a machine-y-2550 and x-4050. I want to build an extreme machine that will be heavy and very nice! But there is one thing that I can`t, and it is all that electronic. I like servo motors, but look in here that stepper works fine. I want an exact machine as possible, Mash3 compensate for the back slash? Hwat can I do to get all the right electric equipment. Is there anyone here that has a shopping list??? And electrical building map for beginners??? :) I would like to have the ability to plug in one more motor on the y axis if I need it one day. Have some answers to my questions????? Regards from one that can`t noting with the electronics! Thank you! |
Svein,
Your English is fine. You have more experience than most of us. I never worked with a CNC machine before I built mine. I had help with some one local but there are many that have had no experience with steel, electronics or software and they have built a machine and it works. There will be others that can help you with the electronics. Gerald's design takes care of backlash so you do not have to do anything in Mach to compensate. One of the first things that is suggested to some one just starting out is to download the plans and print them off and put them a large notebook so you can refer back to them as you learn and prepare for your build. Go through the threads of people that have finished building their machine. You will learn a lot by reading those threads. Start with Gerald's build thread. Look at the Kitchen table project. You can learn a lot there also. Good luck with your build. Ask questions when you got them. |
Welcome Svein:) Hope you find all you need here and have a great build.
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Thank you!
Yes, I have to see everywhere in the forum, I think all of my questions can be answered here. For there are many good builders here. |
Rails
I am looking at buying linnier rails for my MM when I get arround to building it.
The supplier can only supply 3000mm tenghts and I was looking at going 4000mm. The supplier says you can join them but doesn't like to suggest how this should be done. My main concern is if the joint is the slightest amount out of alinement in any direction it will not only damage the rollers and bearings but will jump or distort the cut. Has anybody joined rails and how was it done |
Stuart,
http://www.mechmate.com/forums/showt...p?t=794&page=3 Look at post # 93. There is a picture of the two rails end to end. I did not do anything to the ends that came from the supplier. Before I had the machine up and running, I was concerned that where the two rails meet would be a problem. I even thought when I rolled the gantry over the X rails that I could hear some clicking at the point they joined. Since I am running I have not noticed any problem. I tapped the rails. Be careful when you drill your holes that the rail is tight against the top of the aluminum and of course tight against each other. I have one joint on each X rail and one on each Y. I hope that helps. If you want more pictures, I can take some more and post them. |
...Careful alignment and alternating the seam lines so they do not occur in the same Y plane keeps any joint challenges to a minimum. The joint line in the alternate configuration allows for only (1) bearing to see a joint at a time.
....Now I only wish those expansion joints in the highway would have a slight angle to keep my truck suspension from jarring me so much! Sean |
Rails
Thank You To Sailfl & Sean For The Info Sets Me At Ease A Little And I Hope They Are As Accurate As You Say
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Correct dimensions
Gerald,
If my working area is 450 x 300 cm, referring to your PDF I understood that in order to calculate X and Y size the calculation can be the following: 10 10 123 - Support board: 38 x 12 + 0,29 x 2 = 456,58 cm --> Length 38 x 8 + 0,19 x 2 = 304,38 cm --> Width Then: 10 10 322 - Main longitudinal beams: 456,58 (Support board L.) + 60 = 516,58 cm ---> X Size 10 10 302 - Cross bearer: 304,38 (Support board W.) + 42 = 346,38 + 1 (weld space) = 347,38 cm ---> Y Size Is this correct? Thanks for all and sorry to bother you with this simply question (I am a very CNC newbe) Andrea |
If your working area is 450 x 300 cm, then your X=4500mm and Y=3000mm
From drawing 1010123, you buy a support board 4500mm X 3000mm - to calculate the cross support spacing, 4500 - (2 X 29) = 4442 which must be divided into spaces of between 350 to 400mm. You can use 12 spaces (13 supports) of 370.2 mm - drilling the holes in the Y direction: 3000 - (2 X 19) = 2962 which must be divided into spaces of between 350 to 400mm. You can use 8 holes which are 370.25 mm apart 10 10 322 - Main longitudinal beams: 450 cm (Support board L.) + 60 = 510 cm 10 10 302 - Cross bearer: 300 (Support board W.) + 42 = 342 cm (DO NOT ADD the weld space. . . . . it is a space for the weld) |
Gerald,
the very first step is done! Thanks again Andrea |
board size
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Hi -I live in florida SA, and i am interested in building one of these machines.
But before i start what is roughly the cost to build one of these machine that could take a standard MDF 9x6 board. And do i get get std part that are locally available. |
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