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Nov 2015

Hello,

I’m considering to buy Prusa i3 and I’m looking at two kits at the moment. I want your opinion which is better?

Original Prusa i3 kit with LCD 1.75mm

- Has ability of changing the filament to a different color during the print, but it can automatically stop when the change of filament color is needed. Can other kit achieve this? This is very important to me, so I wont have to tutor it.

REPRAP Mendel Prusa i3 / P3Steel KIT

-What is the quality of this kit?

Please tell me you opinions.

  • created

    Nov '15
  • last reply

    Mar '16
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Hey @3dmne, feel free to check the 3D printer Guide 100 for this, as it is based on the collective experiences of our Hubs.

Hope this helps!

The Prusa model has new firmware for changing the filament. Which sounds like it would come close to working OK. “Close”

The other model looks like standard printer. If you experiment a lot, you could probably find the new Prusa firmware and download it. You probably WONT change filament often because you really need to know to the second when to be there to change it. A print might take 10 hours. changing filament every 10 minutes would drive you nuts.

If you plan on printing many many z layers at a single color, then you need to approximate when to be there. (Or set the “stop at layer Z” plugin with Cura.)

Any machine which has everything included is likely to be less of a hassle than one missing some part (2nd website.)

You may get “that isn’t our part failing, it’s your Ramps…”

Both are VERY close. But, name brands are cool… IE “Prusa”

Gddeen,

This was very enlightening, given the fact that I’m still new to this. I will try to avoid designs where filament changing is frequent. So you are saying that this cool feature about pausing for filament change is actually because a firmware.

And you think that first (Original Kit) has better hardware?

If you consider firmware hardware. I don’t know the price differences so I have no opinion one versus the other.

They are probably identical. The firmware in the first one is nice.

Wait for more opinions…

19 days later
8 days later
1 month later
10 days later

Karl,

I am in MD too, and going to be building a P3STEEL soon with my 2 sons.

All the kits appear to be from Spain, and am at the point of just sourcing my own parts, not sure I want to do this for my 1st build.

I was going to mig or tig weld the frame to make sure it is solid and stays square.

I want a rock solid extruder/hot end and don’t want to skimp there. Is the MK8/9 being offered with the kits good, or just marginable? I was looking at one of the geared such as Bulldog, or is the MK8/( fine for ABS PLA ?

I have heard mixed reviews of “printed” parts, I see molded pieces are available,

I have no problem with mechanical and electronics (drilling, welding, soldering, fabbing) what is your suggestion? Kit or source own parts?

Thanks,

Nick

Hi Nick! Glad to see another P3Steel soon to join the ranks.

Megapost ahead. :stuck_out_tongue:

I sourced my own parts, mainly to customize it for my own purposes. I already had a direct drive single extruder Prusa i3, and wanted a bowden dual extruder version as well as 8mm leadscrew driven Z axes. If you’re fine with the kit’s options and can’t save much from sourcing your own parts, I don’t see any reason you shouldn’t use the kit.

I wouldn’t suggest welding the frame together. You may need to disassemble some parts of the frame in the future for tweaks, upgrades, or replacements, and honestly, the default frame is more than solid enough. It’s already cut in a pattern where the frame elements slot into each other for extremely rigid 90 degree angles. I don’t feel uncomfortable at all standing on it while it’s printing.

As for extruders, my MK7 on my Prusa i3 and my MK8-based extruders on my P3Steel have both been quite reliable and have produced excellent prints (though keep in mind the MK8s are mounted behind the “shoulders” and not on the carriage, so the stresses may be different), and the MK9 appears to be the same basic design with minor differences. It will probably work well. The Bulldog extruder does look to be a better design in terms of torque and precision, but the two issues I see with it are availability and the added weight of a gearbox (the X carriage would be more limited in its speed, assuming you’re using a direct drive extruder). Also, you may have to design custom mounts for the extruder on the carriage or anywhere else if you’re doing a bowden setup. If you’re willing to deal with all of that the Bulldog could be a worthwhile upgrade.

EDIT: I should mention that you’ll likely experience a failure with extrusion at some point during the printer’s life, but more than likely it will come from a jam either inside the heatbreak or in the nozzle rather than the extruder. Because of that, it’s pretty important to have a few spare nozzles and even a few spare heatbreaks at your disposal (try to opt for the Teflon-lined kind unless you can afford the highly polished E3D heatbreaks, since cheap non-lined heatbreaks will jam with PLA).

Printed parts have never been a problem for me. The three printed components necessary for the P3Steel (two X ends and the X carriage) have barely any stress placed on them, and assuming the printer prints them well, with a decent number of perimeters and 50% or so infill, you’d be hard-pressed to break them. Also, I haven’t seen any molded parts that offer X belt tensioning braced by the X rods rather than the Z rods, which is almost critical if you want a proper, tight belt tension but want to avoid bending the Z rods.

There is the option of replacing the X ends and carriage with steel laser-cut parts, which eliminate plastic parts entirely from the frame and use them only for inconsequential things such as the endstop holders. I haven’t seen a need for that, though.

There’s no real need to overbuild it. It’s already a solid design and will already last a long time even after taking a beating. Just maintain it and treat it well, maybe do a few upgrades once in a while, and it will do everything you need it to for years to come.

Hope this helps!

-Karl

Karl,

Thanks for the reply.

I did not find any “One” P3Steel Kit that had everything I wanted, but at the same time need a kit to “see how it works” the 1st time. That being said, I will build it, then probably modify to suit my needs/desires. Most all the P3Steel kits are from Spain, only 2-3 ship out of Europe. The makefront kit was 500.00 without standalone electronics, and the zip ties really turned me off.

I ended up going with a HTA3D kit,

I’ll let you know how it goes.

Nick

2 months later

BTW I am in WV just over the border from Hancock, MD.

I am looking at the kit on Amazon for the Original Prusa i3 3D Printer kit from Josef Prusa. How can I tell if the frame is metal? It appears to be so but it doesn’t mention it anywhere. I am interested in printing O Scale (1:48) details for model railroading. this will be my first 3D printer.

Thanks

Jay Beckham

Berkeley Springs, WV

james@thebeckhams.us