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Reviews (27)
Oct 30, 2019
Geeetech i3 Pro C Dual Extruder
The Geeetech Acrylic i3 Pro C Dual Extruder is one of the cheapest, if not THE cheapest dual extruder 3D printers available.
For the price, I wasn't expecting much. And yes, the quality of this kit reflects the price.. But in the end, you can build a working dual extruder 3D printer with this kit!
The kit has a few tools included and plenty of spare hardware. The online instructions are adequate, but the best resource is the online assembly videos which correct some of the errors in the manual. The assembly instructions and videos are good up to the very end where much of the tidying up and detail work are left to your imagination, Troubleshooting and in particular getting the driver currents set is best found in Geeetech's forums..
The User Manual is also a bit sparse for beginners, but the referred resources work well enough. Google is your friend here as well!
One particularly glaring error is the manual shows setting software for 0.4mm orifices, while the machine has 0.3mm ones installed. This can cause much head-scratching and character-building! Better wording might be to check the nozzle size and enter the correct one.
Because the structure is weak acrylic, many of the critical dimensions are apt to change. Also, there are no automated bed leveling or compensating systems, meaning that one MUST carefully check heads to bed spacing before every print. You can get this down to only a few minutes one you get a good routine developed. Fortunately, the dual extruders maintain their position well once set, which is well, tricky.
A nice surprise is that the minimal Power Supply works well enough and the GT2560 controller work well enough.... once you get the mechanical friction then the driver currents to the point where the stepper motors stop skipping steps. The heated bed and glass plate bed are adequate.
Another nice surprise is that when printing with a single head, the unused cooler nozzle does not plow into the work... probably because the working hot end is well, hot and expands downward slightly.
As this is a PRUSA clone, many of the critical dimensions are the same, meaning readily available upgraded parts can be made to fit, particularly parts meant for the PRUSA Mk1 and Mk 2.. Expect even more character-building if you go down this path.
A metal or at least non-acrylic Y-axis carriage would probably be a big help, as well as a stiffer bed heater and build platform.
The good:
Low price!
Adequate and complete.
Dual Extruders
Good forums and support
Inexpensive replacement parts
Possibility of upgrading the PRUSA-based design.
Actually works..
The bad
Weak acrylic structure
Lots of fiddling, tweaking, figuring out and character building
Iffy quality of some parts , linear bearings / rods, not especially smooth, x-axis ends need straightening and filing holes to size
No dedicated parts cooling fan
Not the best instructions
Not for beginners or the non-mechanically inclined
Apr 06, 2020
Great little 5V regulator!
The Pololu 2.5A / 5V voltage regulator worked well to replace a linear voltage regulator in an old power supply. The Pololu runs cool with no heatsink, while the old 78S05 required a huge heatsink that got very warm. While in use for several days, the voltage remained steady, and the power supply section remained cool. The device it powers runs more stable than previously, as it would act up as the power supply got hot.
The in-circuit ripple measured lower than two other similar regulators I tried, so I used this Pololu. This regulator operates on a different principle than a linear regulator, so it may or may not replace one directly without other modifications. In my case, the circuit needed slight modification.
While the Pololu works great for powering a digital device, it might not be the best choice for a low-noise situation, such as powering audio equipment. Still, I wouldn't rule out trying it...
Oct 13, 2020
Honeywell T10 Easy to live with!
The Honeywell T10 is one of the current full-featured touchscreen thermostats.
The touchscreen interface is responsive and reasonably well thought out and the light color scheme goes well against a light colored wall.
Temperature control is comfortable and unobtrusive with one caveat.... the T10, like most Honeywell digital thermostats , use small relays to control the heating and cooling systems. These relays produce a light “click” noise once upon starting the heat or cooling, and once upon shutdown of the system. If the thermostat is near a bedroom or a quiet area, this can be annoying. It is quieter than some other thermostats, but not as quiet as some other brands which are silent.
Oddly, the T10 and its less-featured sister the T9 cannot be used with Honeywell’s old TCC app. The new Honeywell Home app works well enough though.