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Some pricing from Posa for reference.
1
Spindle for
CNC Machining Center
Built-in
EMS-30
12,000/ 15,000 RPM
SET 1 USD4,225
2
Spindle for
CNC Machining Center
Belt Drive
DS-BT30
15,000 RPM
SET 1 USD2,630
3
Spindle for
CNC Machining Center
Belt Drive
DS-BT30
12,000 RPM
SET 1 USD1,840
http://en.machine-catalog.com/adsl/O...atalog/214.htm - you can find teh details in there.
Some update after a long absence (and winter).
Gantry is now epoxied to the main structure. Waiting for the epoxy to harden fully before taking away the jacks / hoist to see if it holds the estimated 700 kg gantry.
Busy drawing up the proxy mount parts and did some testing with them.
Id like to add limit switches, can I use proxy switches in series or best to go mechanical for these? I want to use all in series going to a single input in CS Labs / Mach 3.
Attachment 21481Attachment 21482
So, an update.
I managed to epoxy the gantry to the main body. Scary stuff this. Will some 'glue' hold an estimated 750 kg weight? Seem it does.
https://c1.staticflickr.com/5/4163/3...1da633a7_b.jpg
Next step was to rotate the mass and remove the table as I needed access to the rails.
Ignore the loose rails in the middle of the lower part.
https://c1.staticflickr.com/5/4170/3...93a9bc71_b.jpg
I then, with a lot of effort, lift my 300 kg 'reference' onto the rails, align and mount so that I can use this to get the epoxy set against the gantry.
https://c1.staticflickr.com/5/4177/3...8cabc3f4_b.jpg
https://c1.staticflickr.com/5/4178/3...68931448_b.jpg
The nett result is that I have something that moves forwards and backwards that is aligned to the bottom rails and should therefore be square once moulded. I should be doing the epoxy pouring this weekend.
Some of you might note that the reference part is only 50% of the width of the gantry. I dont have a larger reference surface and using it on its side means it will be too low.
So two options. I can either mould this width and then use a surface plate that I have and basically overlap until I get the full width.
Second option (and what I have gone for) is to basically put 100mm wide (the rails are only 40 but I need some extra height for the adjustment up and down) 30mm thick alu tooling plate (Eco Cast). I know its not perfectly flat but I am hoping this will be reasonable. Ill bolt this to the reference square and see how this looks.
https://youtu.be/ZtDXA0xAFhQ
Mounted the tooling alu, a quick sweep tells me it looks to be accurate to within 0.05mm. Not ideal but not bad for a garage job.
Around 6 coats of carnuba wax later, we are ready to pour the epoxy.
https://c1.staticflickr.com/5/4193/3...4163ef0c_b.jpg
https://c1.staticflickr.com/5/4185/3...00fd893b_b.jpg
https://c1.staticflickr.com/5/4187/3...ba09179a_b.jpg
https://c1.staticflickr.com/5/4169/3...56d4ec23_b.jpg
The epoxy takes 24-48 hours to set but will leave it for the week and remove the reference table / plates to see the result. Then it will be a case of drilling holes and mounting the rails which is a pain in the backside. Not sure yet how Im going to epoxy the nuts in yet - when doing it from the top, gravity helps. On its side, not sure.
Success!
Apart from some places that remained a bit unmixed, the rest has gone hard and is mirror smooth.
Removed the reference frame, alu still 'stuck' to the epoxy.
https://c1.staticflickr.com/5/4158/3...10c9b4fd_b.jpg
Then, a bit of prying with a crowbar and both parts are off.
The remaining epoxy is smooth and even has the tooling marks that transfers across from the plate.
A quick test with a straight edge confirms all is good. A quick test with the rails indicate they arent perfectly straight (This will be fixed as they get bolted down).
https://c1.staticflickr.com/5/4187/3...8265cd6c_b.jpg
https://c1.staticflickr.com/5/4166/3...501b3bfe_b.jpg
https://c1.staticflickr.com/5/4190/3...40753021_b.jpg
Next step is to drill two holes, around 1/3 from each side and mount, get basic alignment, using reference piece for X travel height calibration. Marking the rest of the holes, drilling, then mounting with another alignment test. This takes ages as I need to go to around 26mm from memory and there are many to drill into this hard concrete.
Not sure if anyone is actually reading this thread anymore or not.
Im going to use a cheap chinese spindle (4KW) to start with. Ill look at a more expensive setup later.
Good source for decent quality ER20 collets please?
Thanks
Well I am following along with interest :applouse:Quote:
Not sure if anyone is actually reading this thread anymore or not.
Me too.Quote:
Originally Posted by Clive S
And me, just not on here that much at the moment...
Sent from my HUAWEI VNS-L31 using Tapatalk
I'm also watching.
Not had much time to post much, as I'm gearing up for a few weeks of work chaos. Normal service should resume sometime next month.
I am here watching also, not much to comment because of lack of experience and also because I am speechless.
i'm watching this thread with great interest.
Please continue to post as much as you can.
Ditto to that comment! Following your thread with interest, thanks Chaz, please keep the posts coming.Quote:
Originally Posted by Nickhofen
Whilst some of the detail is sometimes beyond me (on all threads), the photographs make sense to me.
I'm also watching - only problem is its giving me ideas :-)
Ok, thought people had lost interest in the crap I was trying to do.
So, status update.
Z Axis plates arrived today, Ill try and machine them on the weekend. I need to mount the X rails, having some issues to solve around how to epoxy / glue the nuts in. Tried rawl bolts, been advised against them and they create spacing problems which I need to solve.
I dont have all the bits needed to complete and I still need to sort out limit / home switches etc but I'm feeling confident that I am not too far out now. The last phase has started to pick up momentum. That said, fair bit to do still, so lets see.
You sir are completely and utterly bonkers ;)
But a good kind of bonkers lol fascinating project looking forward to seeing her cutting.
Lol. Thanks.Quote:
Originally Posted by Desertboy
I have good advice that I can supply once I am done. The one liner is, if you are thinking of making something like this, dont. If you are still thinking of it, dont, and still, dont.
That said, it can be done and there are many things I would do differently, not in terms of design etc, but the way that I work and what tools / stuff you need to make this happen.
This is on such an epic scale it almost ranks with Noah's Ark.Quote:
Originally Posted by Chaz
I think it has to be finished, there has to be a conclusion, at least a video of it cutting. Something a futuristic Time Team can search the archive for when they recover this behemoth intact from the apocalyptic, London ruins :rapture:
I want to see his concrete car ;) Still handles better than a yank lol.Quote:
Originally Posted by Robin Hewitt
Ye, ignoring the cash spent, also keen to just see if it works.Quote:
Originally Posted by Robin Hewitt
Managed to get some of the Z axis completed today but I need a large mill to square everything and get this completed.
Attachment 21784Attachment 21785
A long shot, anyone near Uxbridge (I am willing to travel) that has a mill that I can use to get this Z Axis completed?
I need something that can do around 500 x 400 mm. I have access to a Bridgeport but no response from the person that offered. I just need to go around the rectangle and square up and do around 16 holes with some very basic code.
Thanks
Hi, I just read the whole thread from the beginning amazing work but I have one question where did you get your rails?
Attachment 21807
these are my carriages, look familiar lol trying to source the rail. Looking at yours I think I have the baby version (20mm rail)
Thanks. They look to be Bosch or Rosa. I can put you in touch with my supplier, he deals in 2nd hand stuff and may be able to source for you. Let me know.Quote:
Originally Posted by Desertboy
Managed to get access to a bridgeport type machine to do work on the Z Axis. Almost done, need to do a fair bit of tapping and will then assemble.
https://c1.staticflickr.com/5/4224/3...6edf5e8c_b.jpg
https://c1.staticflickr.com/5/4274/3...1943c2ae_b.jpg
Looking very very good ;) I just love CNC machined aluminum it's like a work of art all on it's own!Quote:
Originally Posted by Chaz
I hadn't appreciated how big your ballscrews were lol! How big are your rails? I'm guessing 35mm+
My rails are 40 and if I recall 35 for the smaller ones.Quote:
Originally Posted by Desertboy
The ballscrews are 40 and 25 from memory.
LOL you beat me to it I meant to write 35mm by the time I edited it you already posted lol, looking at the pic of your hand against them damn they're big.Quote:
Originally Posted by Chaz
If you don't mind me asking how much were the ballscrews and rails? I assume they're not cheap lol.
I need to check, I bought two sets of components from my supplier, I think all in for 4 x 1180mm 45 Bosch rails plus carts plus around 6 different ballscrews (longer length) and 2 shorter length ones plus the a short set of rails and the Rosa ones being used on my Z Axis (700mm) was around €2500 or 3000. Not cheap but the 'list' price on a Bosch 45 Rexroth with rollerbearings and a set of carts is around €1K per set.Quote:
Originally Posted by Desertboy
That seems reasonable I was thinking it would be even more! Amazing how being into cnc changes your perspective of reasonable lol.Quote:
Originally Posted by Chaz
So glad I only want to do aluminium and wood. This is definitely the most interesting (Read loony toons) cnc build I've ever seen if only for it's grandeur.
Ye, its all relative. Let's see if this thing even works or not .... I should know in the next few weekends.Quote:
Originally Posted by Desertboy
Ok, cleaned up a bit, removed the reference table, mounted the main table and did a quick test fit of the Z Axis bottom part.
The naked machine
https://c1.staticflickr.com/5/4250/3...ca166f4d_b.jpg
Some bits on it
https://c1.staticflickr.com/5/4269/3...85510c6a_b.jpg
Z axis, ballscrew is just 'hanging' onto the overhang, not mounted. The Z axis needs some of the holes to be drilled all the way through and I need to find the location of the bottom carts. I did not have the measurement at hand when I machined the holes on the larger mill. As these are not threaded, I have a bit of margin for error.
https://c1.staticflickr.com/5/4228/3...9be04345_b.jpg
That's looking a bit of a beast Chaz!
Sent from my HUAWEI VNS-L31 using Tapatalk
Ooo you do like to jest!Quote:
Originally Posted by Chaz
:joker:
I have to say I think your 3d printer might be a bit over engineered ;)Quote:
Originally Posted by Chaz
That is a work of art ;)
Can anyone recommend me a nice simple watercooling solution for the 4KW Spindle.
I had considered something like:-
6mm fish tank tubing (size to be confirmed)
Small fish tank pump
Some form of container that allows the heat to leave the cooling cylinder.
Ive seen some elegant solutions that use a CPU type cooler for a closed loop system, I am all ears ...
Thanks
Something like this (With fans stuck on it) would work well
http://www.ebay.co.uk/itm/Baxi-105HE...UAAOSwA3dYPbSU
Simply splice the radiator into the return.
Thanks. Certainly an option.Quote:
Originally Posted by Desertboy
I like this too, not sure how adequate it would be on a 4KW Spindle.
https://www.youtube.com/watch?v=2OZCviK0msg
I would worry that's underpowered but I also read you don't need a lot as the spindle are pretty efficient and don't make much waste heat. I'm going to use a 2.2kw spindle for maybe up to 10 hours per day 5 days a week I'm hoping a 200l barrel will be enough on it's own but if need be I'll use one of those heat exchangers I linked to I can get them much cheaper than that link from scrap yard friend so if you ever want one just PM me and I'll sort it out.Quote:
Originally Posted by Chaz
I'm only going to use a maxijet pump (Aquarium style) but it'll be fine as long as the head height is enough (Which it is 2m's) but will need to reduce it for the spindle (13mm standard hose pipe on pump)
The heat exchangers are 25mm pipe compatible
These fans are pretty quiet and pump a lot of air also cheap!
http://www.ebay.co.uk/itm/4-5-6-Bath.../261741641853?
Just drill some holes in the fan casing and cable tie it to the radiator it's probably best the blow through the radiator but even if you suck I bet it would work great.
You can fit 2 5" on the heat exchangers but 1 6" would be fine on it's own.
It seems most get away with 20 litres or less. Your 200 will be a massive overkill.
Ha ha ha now I take that as compliment from the man who's building his cnc machine from concrete and called it after either a norse god with a big hammer or the god of war lol.Quote:
Originally Posted by Chaz
I have the space and the waterbutt so I figured why not ;)