Hi All I'm thinking about building a larger 3d printer, I have had a few different models but nothing larger than 200 x 200 x 200mm build volume. Has anyone tried to make a larger version of the Core? It seems like the box offers a very simple, cheap and sturdy construction and any weakness in a larger box could be addressed with struts to brace the front. Would it be easier to expand X+Y rather than Z or the other way around? Or would it not matter? I guess I'm more interested in building something that has a larger X+Y than Z. Would the belts be a problem? I can see from their website the Gigabot doesn't use GT2 belts but not sure what it uses instead. Thanks John https://reprap.org/forum/read.php?344,509030,509030#msg-509030 Sun, 12 Apr 2026 16:05:14 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?344,509030,512666#msg-512666 https://reprap.org/forum/read.php?344,509030,512666#msg-512666
This is a nice example of a large printer making big parts quickly using a larger nozzle
https://plus.google.com/+BrookDrummpb/posts/jmM7bwShYLw]]> John Cummings Smart_Rap Sat, 23 May 2015 16:55:40 -0400 https://reprap.org/forum/read.php?344,509030,510525#msg-510525 https://reprap.org/forum/read.php?344,509030,510525#msg-510525
I don't get the need for large machines anyways. I feel it would be better to design smaller parts that assemble into larger parts well. Could you imaging the loss of a failed print at the 2 or 3 day Mark of a large part instead of 6-12 hours?]]> madmike8 Smart_Rap Mon, 18 May 2015 12:39:20 -0400 https://reprap.org/forum/read.php?344,509030,510499#msg-510499 https://reprap.org/forum/read.php?344,509030,510499#msg-510499 smerrett79 Smart_Rap Mon, 18 May 2015 11:53:06 -0400 https://reprap.org/forum/read.php?344,509030,510438#msg-510438 https://reprap.org/forum/read.php?344,509030,510438#msg-510438
Cheers

John]]> John Cummings Smart_Rap Mon, 18 May 2015 09:22:09 -0400 https://reprap.org/forum/read.php?344,509030,509969#msg-509969 https://reprap.org/forum/read.php?344,509030,509969#msg-509969 smerrett79 Smart_Rap Sun, 17 May 2015 09:43:50 -0400 https://reprap.org/forum/read.php?344,509030,509968#msg-509968 https://reprap.org/forum/read.php?344,509030,509968#msg-509968
I'm interested i make a big Smartrap Core. I plan to use a 220V heatbed, because 12 or 24 v needs a wide wiring to carriage the amps, the better way i thing is go to use a relay.

About the size, for the moment, i only find one shop here in Spain that sells 220V heatbeds, and the bigger size is 200x300mm (heatbed + aluminium base), have to search more. Maybe someone can help me in the search ;)

Instead of and inductive sensor i will use a capacitive sensor, conected to 12V, and have two alternavites, use a volt divider with 2 resistors, or use a litle circuit with and optocoupler to isolate 12V from power the sensor to the in of ramps, that will be 5V. Like this one Ebay_Link, this way can use interchangable glass or mirrors.

My target is a print volume of at least 300x300x300 or 400x400x400 (if i found a heatbed), with dual extruder, and maybe, with enougth room to make a triple extruder...
My actual Prusa I3 Box Frame have a footprint about 500x500x500 and wanna change it by a Core that fits this foot print (:P) maybe the printing volume will be larger (:D still analyzing it...

Wanna use M8 leadscrew for Z, with 2 motors, thing that for this size is the better way. I see some coment on the facebook group about put a z-max endstop, i think it's a good idea. And put some adjust screws in the plate.

It's a long term project, because i have problems with financing 8-)]]> CeledaBcn Smart_Rap Sun, 17 May 2015 09:42:44 -0400 https://reprap.org/forum/read.php?344,509030,509895#msg-509895 https://reprap.org/forum/read.php?344,509030,509895#msg-509895
If there's a few of us interested in making a bigger Core perhaps we could agree on a size and make ours at the same time so we can help each other get over the lumps and bumps.

Cheers

John]]> John Cummings Smart_Rap Sun, 17 May 2015 05:54:28 -0400 https://reprap.org/forum/read.php?344,509030,509248#msg-509248 https://reprap.org/forum/read.php?344,509030,509248#msg-509248
Kinda wish I had found the Smart Core before I started my current build. Would have saved me lots of $$. Oh well.]]> gmh39 Smart_Rap Fri, 15 May 2015 11:02:53 -0400 https://reprap.org/forum/read.php?344,509030,509147#msg-509147 https://reprap.org/forum/read.php?344,509030,509147#msg-509147
The other consideration that you should make is whether your motors produce enough torque at the speeds you want to accelerate, drive at constant speed and decelerate the moving parts. I stuck with nema 17 motors for my larger printer design (remember I haven't made it yet) but don't know what your goals are.]]> smerrett79 Smart_Rap Fri, 15 May 2015 06:02:51 -0400 https://reprap.org/forum/read.php?344,509030,509129#msg-509129 https://reprap.org/forum/read.php?344,509030,509129#msg-509129
I'd be happy to make one without a heated bed, I'm only interested in printing with PLA for now. What size do you think I could get up to? I'd be very happy with something 400mm or 500mm square.

What would I need to do in terms of software to make it understand that it is larger? Would it simply be changing the sizes in Cura etc?

Cheers

John]]> John Cummings Smart_Rap Fri, 15 May 2015 05:02:22 -0400 https://reprap.org/forum/read.php?344,509030,509061#msg-509061 https://reprap.org/forum/read.php?344,509030,509061#msg-509061
Jose]]> rcjoseb Smart_Rap Thu, 14 May 2015 23:04:19 -0400 https://reprap.org/forum/read.php?344,509030,509041#msg-509041 https://reprap.org/forum/read.php?344,509030,509041#msg-509041 sethmo Smart_Rap Thu, 14 May 2015 20:57:58 -0400 https://reprap.org/forum/read.php?344,509030,509030#msg-509030 https://reprap.org/forum/read.php?344,509030,509030#msg-509030
I'm thinking about building a larger 3d printer, I have had a few different models but nothing larger than 200 x 200 x 200mm build volume. Has anyone tried to make a larger version of the Core? It seems like the box offers a very simple, cheap and sturdy construction and any weakness in a larger box could be addressed with struts to brace the front.

Would it be easier to expand X+Y rather than Z or the other way around? Or would it not matter? I guess I'm more interested in building something that has a larger X+Y than Z.

Would the belts be a problem? I can see from their website the Gigabot doesn't use GT2 belts but not sure what it uses instead.

Thanks

John]]> John Cummings Smart_Rap Thu, 14 May 2015 19:43:24 -0400