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Re: replacing a sliding table saw with a CNC router
开云体育Fascinating video Brian.? I really liked the plunge cut chain-saw
head for mortises.? If I wanted to make a couple hundred thousands
of something and I had the necessary capital, this would be a lot
of fun. On 5/23/2021 10:16 AM, Brian Lamb
wrote:
For an idea of what’s out there in aggregate heads, watch this video:?? -- Michael Garrison Stuber |
Re: replacing a sliding table saw with a CNC router
开云体育Remember, you're depth of cut is limited by the length of your tooling.? In general, the longer the tool is, the larger the diameter is going to be.? Cutting 8/4 stock is going to require at least four passes (probably more, but it depends on the machine) with a 1/2" diameter cutter.? That's a lot of waste.? You might be able to get away with using a 3/8" diameter cutter, but you're probably not going to find a 1/4" diameter that is long enough to provide the required clearance. In terms of rip versus crosscut, the CNC machine doesn't really
care.? It's more of a question of conventional versus climb
cutting, as everything is being done with a spinning router bit
rather than a blade.? Also keep in mind that you're not going to
get square inside corners.? There are ways to mitigate this some
(depending what you're trying to achieve) such as dog bones, or
changing tools to small a smaller diameter cutter, etc. but it's a
fundamental limitation of the type of cutting you're doing. Regarding bed size, you can get machines with longer beds if
desired.? I'm seriously considering 5x10 for my next machine.?
This would let me work with two pieces of 5x5 baltic birch at once
if desired, or leave a rotary axis at one end while still having
room for a 4x8 sheet of plywood.?? But yes, the bed size is the
basic limitation, unless you're willing to have stock overhang one
end and reposition it after a series of cuts. You'll need to work out how you're doing your registration for
joinery.? On a saw there's a fence.? When well-tuned you know
exactly the relationship between the fence and the blade.? There
is no "fence" on a typical CNC machine.? You would either need to
do all of your cutting and joinery in one operation so that the
joinery aligns exactly with the other cuts being made, or you need
to provide a mechanism for registration.? On my CNC machine I
implemented something like a festool MFT with 20 mm holes in a
grid pattern across the bed.? I then milled a set of solid
hardwood fences that I can pop in anywhere in the grid pattern on
the table.? I can them use festool FMT clamps or some of the lee
valley bench pups to hold stock against the fence.? I have program
that aligns the cutter head with the edge of my fence (as opposed
to the proximity switches).? This works pretty well for allowing
me to do repeatable cuts into the surface of my stock, but it
would be a fail for doing any profile cuts around the stock.? By
using hardwood for my moveable fences there's not too much harm
done if screw up and run the tool into the fence.? (Side note
here, I've ended up with a variety of brass, plastic, wood, and
aluminum for hold-downs so I don't do too much damage if I've
misjudged a clearance.? I'm embarrassed that I make these
occasional mistakes with the machine, but they continue to happen,
so I have just made a point to make them less painful.) Again, I'm not saying it can't be done, but you're definitely
going to need to think through the order of operations in your
joinery and how you're going to solve the combination of hold down
and registration issues. On 5/23/2021 9:30 AM, Bill James via
groups.io wrote:
Thanks for all the feedback, -- Michael Garrison Stuber |
Re: replacing a sliding table saw with a CNC router
开云体育For an idea of what’s out there in aggregate heads, watch this video:??The problem here is the machines stout enough to handle them are usually pricey, like over $100k. They are either Cat40 spindles or HSK63, so big in hp too. And don’t forget, each aggregate head could easily run $4000 to $10,00 in cost. Ones where you see the head rotate, to saw say in the X and Y directions, you have to have a C axis built into the spindle. None of these things are usually found in a 4x8 machine sized for the home shop. Now, can you edge joint large slabs with an end mill, sure, not a problem, and do tenons and mortises, most likely if you have enough Z travel. Ripping boards, not so much if they get very thick. I don’t like to cut with smaller than a 1/4” bit to go through 3/4”, for 8/4 I would be looking at 1/2”, maybe 3/8” if you run slow and multiple depths. That’s a lot of wasted material and time to just cut something. Facing slabs or glue ups is easy, not as fast as a planer or drum sander, and you still have to figure out how to hold it.
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Re: replacing a sliding table saw with a CNC router
Thanks for all the feedback,
I do get than for most of you this is not a replacement, but for my use case I am still no convinced. For examples, I do not cut anything taller than 8/4. I have done cross cut on 4x4 or 4x6, but this can be done on a miter saw. I do not have a shaper, and do everything on my table saw and jointer/planer. I plan to keep my jointer/planer and miter saw. I do get that thin rip (1/8") or face frame stock are too thin for a CNC. As I do those kind of rip cuts, I can live with a small traditional table saw along a wall for that. Then I am left with bigger hardwood stocks out of the jointer/planer for glue ups or others that I normally cut to final size on my table saw. First, I guess I can get final size on the planer. However, can you rip and cross cut 8/4, 4/4 hardwood with a cutter on a CNC as well as do joinery like dado, rabbet on those same 8/4, 4/4? Let's assume lumbers have been jointed and planed and are big enough to work either with a modest vacuum such as hurricane type or a small rotary vane vacuum pump for pods table? Like 4 inches wide at least and a couple of feet long, I guess? What about aggregates? Brian mentioned them and I am wondering what are those aggregates used for beside joinery on the side (drilling) and bevel cut? Are they adding anything for hardwood cutting? I have not yet a shaper, but I am wondering which kind of shaper tasks a modern CNC with vacuum as mentioned above can do without crazy jigs? I see stock longer than 8 ft not feasible on a CNC, but I do not know enough about CNC and shaper to know anything here. Thanks Bill |
Re: Adjusting FB510 table orientation with blade?
#Bandsaw
#whatmachinetobuy
Craig,
????? Looks like you have a great saw. I would get a 1" carbide tipped blade like the Woodmaster CT by Lenox and put plenty of tension on it. They are expensive, but will last easily 10 times longer than steel blades. I would try different ways to adjust the blade as to how it rides on the wheel. Don't worry about not being able to move your table in relation to the saw. Also, adjust your guides as per the Snodgrass videos. I think you will not have any more drift problems. And if you really get into resawing, consider building a taller fence and something to keep pressure on the stock to keep it tight against the fence as you saw. I used to hate resawing, but since doing all the above to my saw, I really enjoy it now. |
Re: Adjusting FB510 table orientation with blade?
#Bandsaw
#whatmachinetobuy
I quit watching the video as soon as I heard "Center the blade on the upper wheel". This is the method I was first taught and always had problems tweaking alignment. Plus, changing blades means realignment every time.? You will also likely?find the Alex Snodgrass method allows you to make minute upper wheel tracking adjustments under tension to correct any miter-slot/fence alignment you are experiencing, easily. That's what I do. In fact my bandsaw's?table isn't fully secured in place. I tap with a mallet to allow extra adjustment with some of the squirrely applications I find in my shop (which I would?recommend to nobody but it works for me). On Sun, May 23, 2021 at 5:05 AM <longdog.woodworking@...> wrote: Hello - --
Brett Wissel Saint Louis Restoration 1831 S Kingshighway Blvd (at Shaw Blvd) St Louis, MO 63110 314.772.2167 brett@... |
Re: replacing a sliding table saw with a CNC router
We justified some of the cost of a great cnc setup by thinking it would eliminate traditional tool upgrade purchases. We bought a slider and shaper a year later upon limitations of the cnc. The previous comments reflect my experience as well.? The cnc can be configured to do many versatile things, but that doesn't mean it is feasible to do so.? You may find space savings don't work out in practice. You may end up with more configuration/setup jigs for your cnc operations modes, plus the inevitable tooling storage needs. I have a nested base cnc but made a vacuum pod table top to replace my spoilboard also, and it has to go somewhere when not in use. The 4th axis setup takes up the space of a standard lathe when not on the table as another example. On Sat, May 22, 2021, 10:12 PM Cliff Rohrabacher, Esq. <rohrabacher@...> wrote:
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Adjusting FB510 table orientation with blade?
#Bandsaw
#whatmachinetobuy
Hello -
I am new here. ?This is my first post.? I have an FB510 band saw and I have been having problems with blade drift especially with wider resaw type blades. ?I was given a tip by a fellow named Bob at R&B Bandsaw to check out this video ? and related article ? by Michael Fortune.? So I began by adjusting the fence clamp bar so the the fence is very well aligned as parallel with the miter slot and blade slot. ? I proceeded to do the cutting tests and the wood is tight between the fence and the left side of the blade. As such the blade is bowing slightly to the right of the operator. ?When I stop the saw in the cut, there is a small gap between the right side of the blade and the wood and of course no gap on the left side. ? Based on the information in the video and article, I conclude that the table (and so too the properly aligned fence) are out of alignment (not parallel) with the blade and in this case turned a bit too far clockwise from the perspective of the operator looking down at the table.? Given this, my desire is to adjust / move the table top relative to the blade (and so relative to the rest of the saw) such that the table top would be rotated very slightly counterclockwise from its current position.? Initially, I mistakenly thought this could be accomplished by loosening the 4 bolts holding the table top to the semi-circular base below it (that base piece is the one that can be unlocked to allow the table top to be oriented on an angle to horizontal) and then just shift the table top as I wanted and retighten (similar to the procedure described in the video). ? The table top cannot be shifted like that because near two of the 4 bolt holes mentioned there are also little placement pins that stick up from the semi-circular base into small holes in the bottom of the table top; these hold the table top such that they exactly align all four bolt holes in the table top with the corresponding semi circular base below. ? As well, there is no play between bolt holes and the bolts; the table top was not intended to be adjusted this way. ?(I tightened the 4 bolts back up).? I notice that there are a pair of bolts which attach the semi circular base piece to the frame below it, and I wondered if there was some play and possibility for adjustment there, but I thought I should try to find out from somebody who knows before trying anything further.? So, please tell me how can I make the such an ?adjustment in the table orientation?? craig |
Re: replacing a sliding table saw with a CNC router
Cliff Rohrabacher, Esq.
开云体育I think this is a case of "One of these things is not like the other" ? on a level that makes them not swappable. How deep? you going to cut with a CNC router? On 5/22/21 5:00 PM, Bill James via
groups.io wrote:
Hi, |
Re: replacing a sliding table saw with a CNC router
开云体育I think this is pretty much on point, you can’t replace a saw with the CNC, there are things that it can’t do easily until you get into the $100k machines that have aggregate heads and can saw and drill in numerous directions. Pod and rail machines have gotten somewhat cheaper, but they can be pretty limited as until you get really big, most won’t cover a 4x8 sheet.I just picked up a 4x8 Stepcraft machine, don’t think it’s all that special, but it was cheap and local. I’ve made a few parts on it and can see the advantages, although work holding is a real pain. I have been screwing sheet goods down to the spoil board, but am almost complete with a vacuum system, just have to machine the plenum table and hook up the last of the piping to the zones. That will help with sheet goods, but I don’t see processing much in the way of solid wood on this. Anything can be done, just don’t know how convenient or fast it would end up being. Programming can be a deep dark hole… fortunately I’ve been doing CNC since the late 70’s, so while working with cabinet shapes is different from what I’m used to, it’s not hard with Vectric and some of the other software packages out there to accomplish what you want. On the op’s list of machines, Freedom Patriot, now sold by SCM, would be my top choice, but you are in the $70k and up range for one with a tool changer and vac table.
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Re: replacing a sliding table saw with a CNC router
开云体育I've had a CNC router for over 20 years now.? I have a ShopBot PRT.? At some point I plan on upgrading, but I've got to finish moving into my new shop first.? Here are my observations:
CNC is a powerful creative tool and I'm very glad I have one.? I don't regret the cost or the space.? That said, while I've done shelving units and cabinets using it, given the limitations of my machine, it's not my first choice.? It's faster for me to knock things out on a saw and use the CNC for fancy decorative stuff.? For some of the small stuff I use my laser cutter instead, as I don't have to fuss with work holding.? When I first got the machine I thought I would use it for everything.? Now I use it for things that require precision, that require embellishment, or for things that I want to create multiple copies of.? When I upgrade machines I expect I'll revisit the work holding part of things and focus on improvements I can make there to make the CNC machine more effective.? I also plan on upgrading to a spindle (quieter) and a tool changer so that I can hog things out with a big bit and then switch to smaller bits for detail work and not have to fuss with it. --Michael Garrison Stuber On 5/22/2021 2:00 PM, Bill James via
groups.io wrote:
Hi, -- Michael Garrison Stuber |
Re: replacing a sliding table saw with a CNC router
IMHO you are still going to want a table saw for cutting hardwoods. There are some things that are going to take you 10 times longer to do on the CNC. Want to rip down some boards? 4 seconds to setup and 4 seconds to cut on a table saw, vs the 10-20 minutes it’s going to take setting up and cutting on the CNC. Want to rip 1/8” strips of hardwood? Not going to happen, or at least not well on the CNC. Hobbyist here as well with a 5’x10’ machine and no way would I get rid of my table saw. Also doesn’t replace a jointer/planner though it can plank down large boards. ?
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replacing a sliding table saw with a CNC router
Hi,
I am trying to find a replacement for my sliding table saw that takes less space but still allows to build hardwood furnitures, builtins, closet systems, kitchen cabinets.. I am not interested in a standard table saw and I plan to keep my jointer/planer, miter saw for some of the hardwood task. I know that CNC routers with flat bed are really good for cabinet box/sheet good, but it seems that the new machines with some pod tables are able to manage hardwood too. I am not a production shop, just looking to see if I can reduce the footprint (2 times the sliding table length, the rip capacity and the outrigger). If anyone has insight on using a CNC for sheet good and hardwood and would like to share, I will appreciate. In term of machines, I am looking at middle to high end version from Shopsabre, CAmaster, Freedom Patriot as they all offer compact design for a 4x8 table. I know that there is a learning curve from software and cutting technics (flow, order, tooling, holding parts), but as hobbyist I do not see any issue with that. Thanks for all feedback, Bill |
Re: Selling my Hammer equip?
Cliff Rohrabacher, Esq.
right now manufacturer's costs are skyrocketing
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There isn't enough of anything?? because of the last 18 months You sell now?? you will find replacing them? will be a ferociously? expensive On 5/19/21 1:54 PM, Someone wrote:
Hi all, |
Re: Shaper with CopeCrafter and outboard fence and pressure jaws to make panels
开云体育You are right, it is not that difficult to make pneumatics work for clamping. Making them look pretty can take some effort though, depending upon the design. Glad you like your Big Squeeze clamps. Big Squeeze 2 club has 30 some members but only 3 in the Big Squeeze 3. So your’s are rare ? Imran On May 22, 2021, at 5:00 AM, Brian Greene <Brian@...> wrote:
?Imran, That’s your awesome clamp coming in from the top, and the little flat ones were Amazon. McMaster for all the fittings. The whole “make some pneumatic clamps work” turned out somewhat easier than I thought, and I’ve plans for them a few other places (with a foot valve) Thanks, Brian
Sent from a device with less than stellar autocorrect On May 21, 2021, at 11:03 PM, imranindiana via groups.io <imranindiana@...> wrote:
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Re: Shaper with CopeCrafter and outboard fence and pressure jaws to make panels
开云体育Imran,That’s your awesome clamp coming in from the top, and the little flat ones were Amazon. McMaster for all the fittings. The whole “make some pneumatic clamps work” turned out somewhat easier than I thought, and I’ve plans for them a few other places (with a foot valve) Thanks, Brian Sent from a device with less than stellar autocorrect On May 21, 2021, at 11:03 PM, imranindiana via groups.io <imranindiana@...> wrote:
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Re: Shaper with CopeCrafter and outboard fence and pressure jaws to make panels
开云体育Hi Brian, Looks pretty good to me. What is the source of cylinders? I have not seen this type. Imran On May 21, 2021, at 5:54 PM, Brian Greene <Brian@...> wrote:
?I made this based on some inspiration here. Bolts on with 1 bolt and I like it a lot better than the countermax. ?Maybe $70 In clamps and valve etc. Sent from a device with less than stellar autocorrect On May 21, 2021, at 4:54 PM, joelgelman via groups.io <joelgelman@...> wrote:
<Video.MOV> |
Re: Shaper with CopeCrafter and outboard fence and pressure jaws to make panels
开云体育?Hi Joel, Hmmm! maybe I did bid on two different jigs over time. I see weaver sells one for the arched rails/panels that looks like a copecrafter. Imran On May 21, 2021, at 4:54 PM, joelgelman via groups.io <joelgelman@...> wrote:
? Imran, I thought the PanelCrafter was for the arches. ? James, I looked up the Weaver, which seemed a bit different and made to work with their machinery and run in a slot. ? As for Mac, I will alert him to this thread and maybe he will have some thoughts on a pneumatic airsled. ?Perhaps such a product would work well with router tables also. Thanks! |
Re: Shaper with CopeCrafter and outboard fence and pressure jaws to make panels
开云体育I made this based on some inspiration here.Bolts on with 1 bolt and I like it a lot better than the countermax. ?Maybe $70 In clamps and valve etc. Sent from a device with less than stellar autocorrect On May 21, 2021, at 4:54 PM, joelgelman via groups.io <joelgelman@...> wrote:
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