New CTC printer came broken

[Mjolinor]

All QIDI printers I've seen have full enclosures, which is Not good,
since enclosures can cause motors to overheat and fail.

If your motors overheat and fail in an enclosed printer then you should buy better motors. Stepper motors are normally rated at way over the maximum temperature that will be seen in an enclosed 3D printer even if you over drive them or use microstepping. My Wanhao has been enclosed since a few weeks after I got it so that I can print ABS with no problems. It has been that way well over a year and has the cheapest crappiest steppers you have ever seen and they have not failed. I have never known a stepper motor fail due to heat and I have been designing machines that use them for over 20 years.

[EagleSeven]

If your motors overheat and fail in an enclosed printer then you should buy better motors. Stepper motors are normally rated at way over the maximum temperature that will be seen in an enclosed 3D printer even if you over drive them or use microstepping. My Wanhao has been enclosed since a few weeks after I got it so that I can print ABS with no problems. It has been that way well over a year and has the cheapest crappiest steppers you have ever seen and they have not failed. I have never known a stepper motor fail due to heat and I have been designing machines that use them for over 20 years.

Mine have never failed because I don't use enclosure and have a fan at X & Y motors to prevent overheating.
If they get too hot to touch, then they are Too Hot !
(Motor failure info, from over-heat in enclosure, is from videos I've seen on internet)

[Mjolinor]

If they get too hot to touch, then they are Too Hot !

That is an incorrect statement. Go read some specification data. Guessing technical information is not fact.

[dspdrew]

If you bid on them, or make an offer for $650 or $400 + $150 shipping (depending on which listing), you will get it for that price. I don't know of any mods to make the frame steel, other than buying a steel frame. They all come with acrylic covers, but you don't need to put them on unless the material you're printing with requires it.

My friend has a CTC Bizer I with the metal frame, and his whole package was way better. Either they have changed a lot about their packages, and what's included, or this is just what you get with the Bizer III. All I know, is you don't want what I got for $800... trust me.

[EagleSeven]

If you bid on them, or make an offer for $650 or $400 + $150 shipping (depending on which listing), you will get it for that price. I don't know of any mods to make the frame steel, other than buying a steel frame. They all come with acrylic covers, but you don't need to put them on unless the material you're printing with requires it.

My friend has a CTC Bizer I with the metal frame, and his whole package was way better. Either they have changed a lot about their packages, and what's included, or this is just what you get with the Bizer III. All I know, is you don't want what I got for $800... trust me.

That Does sound like a Good deal !

To me having a metal-frame is Not that necessary !
Metal frame is Very Good but wood frame model has a few advantages over metal also.
(such as easier to modify)
The only real problem I've had with wood is that assemble-screws vibrate loose,
after several months of use, but it's not a big problem to tighten them again.
(I've tightened them 3 times during the 16 months we've had the printer)

[dspdrew]

That Does sound like a Good deal !

To me having a metal-frame is Not that necessary !
Metal frame is Very Good but wood frame model has a few advantages over metal also.
(such as easier to modify)
The only real problem I've had with wood is that assemble-screws vibrate loose,
after several months of use, but it's not a big problem to tighten them again.

Just curious, why do you say the wood frame is easier to mod?

[EagleSeven]

Just curious, why do you say the wood frame is easier to mod?

Wood is much easier to drill, cut and fill , than metal.
(for any addition, change or repair)

[dspdrew]

Wood is much easier to drill, cut and fill , than metal.
(for any addition, change or repair)

Oh okay, that's not a problem for me.

[curious aardvark]

I'd further add that a metal framed printer is better than a wood framed one for several reasons (I have both).

The metal frame reduces vibration and thus gives cleaner better quality prints and potentially higher resolution prints.
Metal frames do not have lots of little bolts that need regular tightening - and also are much much quieter when printing. I often look across at the metal framed machine when printing to check it's still working.

Modding the wood case is easier. But in all other aspects a metal framed machine is better.

And given the sheer number of replicator pro machines in the world - all with fully enclosed beds and motors - there is absolutely no evidence that they over heat and break.

[rcleav]

I'd further add that a metal framed printer is better than a wood framed one for several reasons (I have both).

The metal frame reduces vibration and thus gives cleaner better quality prints and potentially higher resolution prints.
Metal frames do not have lots of little bolts that need regular tightening - and also are much much quieter when printing. I often look across at the metal framed machine when printing to check it's still working.

Modding the wood case is easier. But in all other aspects a metal framed machine is better.

And given the sheer number of replicator pro machines in the world - all with fully enclosed beds and motors - there is absolutely no evidence that they over heat and break.

Well said couldn't agree more.