Hello dear readers and homemade products!
Recently, 3D printing is becoming more and more popular, and some of you have already purchased a 3D printer . It would seem that this device alone is quite enough for high-quality 3D printing, but some additional devices are still required.
One of the keys to successful and high-quality printing without defects is the correct preparation of the material itself (rod or filament), namely its drying.
40 to 70 degrees.
In this article, the author of the YouTube channel “Techie's Corner” will tell you how he made a dryer for filament.
This project is quite simple to make, and can be repeated at home.
Materials required for DIY.
– Mini Power Supply
– 12V Time Relay
– 12V Digital Thermostat W1209
– Solid State Relay
– Thermal Relay
– Metal Push Button Switch
– Dryer for vegetables and fruits
– Heat shrink tubing, flexible silicone wire, ball screws
– Universal clamping terminal block, fuses Two-component epoxy adhesive
– Filament for 3D printing.
Tools used by the author.
– Soldering station
– Pliers, wire cutters
– Digital kitchen thermometer
– Dryer for filament.
So, the author decided to remake and modify a conventional electric dryer for vegetables for drying plastic. For this, even their cheapest models are suitable.
In this version of the alteration, the dryer can no longer be used for its previous purpose. However, everything can be done so that the device can dry vegetables and fruits – for this it will be enough to save the nets and replace them with a cylinder.
At the same time, the installation of additional electronics will expand the functionality of the original device and increase the accuracy of temperature control.
So, the first step is to remove the metal grill by unscrewing a few screws.
This model is not even equipped with a circulation fan, it has a heater with thermal protection. Hot air flows inside the enclosure due to convection.
The maximum temperature to which the air was heated reached 70 degrees. This is more than enough for drying common plastics.
For low-melting filaments like PLA, the drying temperature should be lower, about 50-55 degrees, so the dryer will have to be equipped with a thermostat. You will also need to limit the drying time, which will require a time relay.
< img class = "aligncenter" alt = "Simple DIY filament dryer" src = "https://usamodelkina.ru/uploads/posts/2021-06/1623194562_sf-024.jpg"/> As already mentioned, the master will no longer dry vegetables in this device, and there is simply no room for placing the coils of plastic inside the case. Therefore, the extra lattices are simply removed with pliers, only the outer rings from them are preserved. One of the grids is left intact.
During drying the bobbins should be placed vertically – this way the process goes faster and the air circulates better. The author did not have enough of the nominal height of the rings, and he printed another one on his printer. You must use PETg or ABS filament .
All rings glued with a two-component epoxy adhesive. Moreover, the ring with the grate is located at the very bottom of the structure – it will protect the bobbins and plastic from contact with the metal grate, which can have a higher temperature, warming up from the radiation of the heating element.
Electronic modules there will be only two – timer (time relay) and digital thermostat .
Since they are powered by 12 Volts DC, you will need a mini power supply .
The connection diagram of the modules is very simple, and is shown in the picture. The momentary button will restart the device after the automatic shutdown by the timer.
Additional protection in the form of thermal relay and a fuse you can supply at your discretion. Both the one and the other element are included sequentially, in the break of the power wire.
< img class = "aligncenter" alt = "Simple do-it-yourself filament dryer" src = "https://usamodelkina.ru/uploads/posts/2021-06/1623194657_sf-059.jpg"/> The author has developed and printed a simple cover plate with holes for installing modules, and outputting wires.
Modules are interconnected according to the scheme. Wires should be used with a cross section of at least 0.75 mm² (the power of the heating element in this model is only 150W).
During operation, the thermostat will turn on and off the heating element, maintaining the air temperature in the specified range, and the timer will de-energize the entire circuit after the time has elapsed. It is important that a used thermostat retains its settings after a power outage.
Remains connected teng to the output of the circuit, and you can fix the patch panel on the dryer body. Here the wizard uses a quick-release terminal block .
Power wires are located outside the case to avoid overheating.
The temperature sensor should be positioned over the metal grill and not touching it. Its task is to measure the air temperature inside the chamber.
As a result , in most models of dryers, can accommodate up to three kilogram spools of plastic.
the dryer came from the author. These electronic modules and their connection scheme are universal. Other devices can be made on their basis.
In the case of using a powerful heater (standard timer and thermostat relays are designed for a current of 10A), it is better to use an additional solid-state relay , controlled by the 12V line.
Of course, for those who like everything ready-made, there are factory filament dryers for sale. Thanks to the author for the simple design of the plastic dryer.
Good mood, good health, and interesting ideas to everyone!
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The author's video can be viewed here.
Hello dear readers and homemade products!