Voltlog

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VoltLog

VoltLog

День тому

In this video I am doing a review and teardown of the 946C 800W hot plate which was supplied for free by banggood. Watch the video to see how the unit is built inside and if it can be used to reflow pcbs.
946C Hot Plate 100x100mm voltlog.com/y/if2ca
946C Hot Plate 200x200mm voltlog.com/y/jn4xp
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#VoltLog #Teardown

КОМЕНТАРІ: 53
@johncook5872
@johncook5872 5 років тому
Two points to note, the thermocouple is mounted directly on top of a heater cartridge not the centre of the plate. the wires passing through the metalwork have no grommets and could lead to a possible failure.
@voltlog
@voltlog 5 років тому
You are right, it would have been nice to have the grommets on the metalwork, but I personally think the possibility of a failure there is very slim, those wires are not moving and the insulation is pretty thick. Regarding the thermocouple, this could be the reason while the on-board display reaches set temperature so fast, while the rest of the plate comes along later. It might be possible to change the position of the thermocouple at the risk of over heating the cartridges.
@CDN_Torsten
@CDN_Torsten 5 років тому
Excellent review - it looks well built. Good brand-name jab regarding the fuse... :) BTW - For measuring the surface temperature to calibrate the controller, I would recommend placing a bit of insulation either over the whole plate, or over the individual thermocouples. Because of the heat loss on the upper surface of the thermocouple, there is a very good chance that calibrating without insulation will result in a surface temperature higher than the readout would indicate.
@voltlog
@voltlog 5 років тому
thanks for the tip, I will try to measure with insulation on top of the thermocouple next time.
@brainfornothing
@brainfornothing 5 років тому
Thanks for sharing !
@voltlog
@voltlog 5 років тому
thank you for watching!
@sdgelectronics
@sdgelectronics 5 років тому
Great stuff. Thanks
@voltlog
@voltlog 5 років тому
thanks!
@jasonmhite
@jasonmhite 5 років тому
I have done some reflowing on a laboratory hot plate. It works well, except that one time I let it get a little too hot and the fiberglass resin in the PCB melted into a molten black puddle. The smell was so bad, and probably really unhealthy... I've been eyeing one like this for a while after seeing one on Marco Reps' channel.
@voltlog
@voltlog 5 років тому
It depends on how hot you had the plate but you also need to consider there are different fiberglass materials and some have lower temp ratings than others.
@jasonmhite
@jasonmhite 5 років тому
​@@voltlog In this case, it was because I was stupid and had a different (lead-free) solder paste that melted at a higher temperature than what I'm used to. I wasn't paying close enough attention to the exact temperature and was looking for the solder to melt, but it went from looking ok to melting, smoking puddle in about 10 seconds. Something like this one would work better, since it has closed-loop temperature regulation.
@rosi6144
@rosi6144 8 днів тому
Hi, i want to buy this unit to replace bad LED's on TV backlight LED strips. Do you still have the unit? If so, is it still working good? Are you still satisfied with it? Hope to hear from you soon. Many thanks in advance
@kekekeernest8920
@kekekeernest8920 2 роки тому
Please how is the resistance wire wired, can u please help, I but a 110v, instead of 220v, please advise
@mbaker335
@mbaker335 5 років тому
I guess like a lot of equipment it would be normal to leave it running for 5 to 10 mins before using to allow the temperature to settle.
@FixDaily
@FixDaily 5 років тому
Great video once again :)
@voltlog
@voltlog 5 років тому
thanks!
@belenhedderich3330
@belenhedderich3330 3 роки тому
Hi Florin how about making a wifi controller for this to be able to make heating profiles like in the oven?
@voltlog
@voltlog 3 роки тому
Yeah that would totally be possible.
@andrethomas1800
@andrethomas1800 2 роки тому
@@voltlog +1 for a custom controller for this one.. could allow usage < 50C - Bug in the firmware it seems if you have it on 50C when it loses power it defaults to 260C... anything from 51C up it seems to remember.
@icpart
@icpart 4 роки тому
Hi do you know what is the width of aluminium base? It will be interesting to view how fast the plate rich the set up temperature and how long is need it to go down if you want to use reflow profile.
@voltlog
@voltlog 4 роки тому
yes, check out the video description.
@icpart
@icpart 4 роки тому
@@voltlog Sorry. Bad English :(. I meaning do you measure thickness of the plate when teardown it? In another video for similar hot plate but with PID regulator the thickness is about 6mm also there is used the PTC heat elements but I am interested in this particular model and from your video I see they used the cartige heating elements which I think are better vs PTC. Also there are models with thicker aluminium base with over 10mm and they have good thermal mass and I don't know which is better thicker or thinner. Maybe thicker will have better spread of heat over entire plate but will heat up slower and if we used it for reflow sometimes it preffered faster heating. It is difficult which model to order. Also I find good controller for upgrade the ALTEC PC410. It is used for BGA reflow stations and also support control via serial interface from PC. Also if you measure rising temperature time for about to 250 degrees it will be great.
@mikegaming4924
@mikegaming4924 2 роки тому
They marketed that it provides uniform, even heating, but it looks like the heating elements are only in narrow spots on the plate. They are selling that thing for 30 euros on aliexpress + 30 euro shipping. Super cheap
@TheDefpom
@TheDefpom 5 років тому
That is the same as the one I purchased a couple of months ago. I got mine for doing MacBook repair work.
@voltlog
@voltlog 5 років тому
Do you use it for the repairs?
@TheDefpom
@TheDefpom 5 років тому
I got it to make removing the GPU easier, as they take a bit of heat due to the PCB having good thermal properties and sucking all of the heat away.
@electronic7979
@electronic7979 5 років тому
Super 👍
@kekekeernest8920
@kekekeernest8920 2 роки тому
Please what's is the input voltage
@SidneyCritic
@SidneyCritic 5 років тому
I know this was only a test, but maybe if you cut 2 long rectangles in a plastic sheet the length of all the pins, it would make a decent stencil because the plastic sheet thickness would limit the paste volume. The low paste volume would naturally stop bridging when it sucks to the pads, so a continuous line shouldn't be a problem.
@voltlog
@voltlog 5 років тому
Never tried it but your idea should work. Mostly these days because of low cost I also order a laser cut steel stencil with the cheap pcbs.
@SidneyCritic
@SidneyCritic 5 років тому
@@voltlog It kind-of works, you just have to be careful about not over doing the paste the smaller the parts get. My stencil was probably too thick for my SSOP-28, and my slots were definitely too big. ukposts.info/have/v-deo/eZGhpJVtgqx7mKs.html
@borayurt66
@borayurt66 5 років тому
A nice equipment to have for the ones doing a lot of reflow manufacturing. For an amateur as myself I think I will stick to my hot air gun for the time being. And one little suggestion for your channel; I think it is about time you invested in a SLR camera and a decent camera stand. Sometimes it really gets messy trying to film with a phone in one hand, and this compromises the quality of your videos. This video definitely needed a better close-up shot with a zoom lens, which is not possible with a phone camera without getting it dangerously close to a very hot plate. Best regards!
@voltlog
@voltlog 5 років тому
Thanks for the feedback, it will be tough for me to switch to a full size camera, the phone has the advantage of being very compact and I don't have to mess with a lot of settings. But I agree I need to improve the close-up shots.
@wi_zeus6798
@wi_zeus6798 5 років тому
Often the power cables supplied from China have barely enough copper in them to not cause problems during normal operation. If something goes wrong i.e. a short with low but not very low resistance (circuit breaker doesn't trip magnetically) they can become very hot. Unfortunately it's hard to determine the conductor thickness without either cutting the cable or buying equipment to measure low resistance. It would be possible to measure the voltage drop across it with a known current though and calculate the resistance and then the cross area.
@voltlog
@voltlog 5 років тому
I agree most power cables coming from china are crap. Most of the times you can feel it in your hand, it feels like crap. This one however felt really good. I think this one is a good cable.
@kekekeernest8920
@kekekeernest8920 2 роки тому
Please how can I convert my hot plate, from 110v to 220v
@TheDefpom
@TheDefpom 5 років тому
I didn’t like how there were no grommets in the chassis for the wires passing through, mine was the same.
@voltlog
@voltlog 5 років тому
I overlooked that aspect, yes it would have been nice to see grommets in there.
@TheDefpom
@TheDefpom 5 років тому
I don't think it is a huge issue, it's not like they see a lot of vibration etc, as long as the edges of the holes are not sharp.
@SpottedEagleOwls
@SpottedEagleOwls Рік тому
how do you clean your hot plate
@voltlog
@voltlog Рік тому
I do my best to get it dirty but when flux residue eventually gets there it's a pain to clean. I use flux cleaner and a brass brush or some fine sand paper.
@UpcycleElectronics
@UpcycleElectronics 5 років тому
I've been curious about a setup like this for awhile. I don't know if a device like this is going to be my solution though. I would have preferred to see a more in-depth characterization of the temperature across the entire surface. I admit I have no experience with hot plate reflow. So my opinion is useless. That said, I'm concerned about reflowing larger boards in the future and the potential for temperature variation across the surface while doing a real flow profile seems like a potential issue. Why the heck does this thing need to get to 946C (1735F)? Is someone looking to reflow brass with this? I do wish these Chinese manufactures would recognize their market though. The ability to hack this kind of thing is probably the primary selling point. This kind of product is obviously as low of a manufacturing cost as possible. However the choices in hardware used could have an exponential impact on the way customers view and popularize this kind of thing. Adding an extra $1-$3 to the hardware BOM could make an enormous impact on the DIY/Hobbyist market. Just choose an AVR, STM32, or PIC μC, and place a functional programming header footprint on the PCB at a minimum. If there are any unused pins on the μC, break them out to unpopulated pads. If they must do some cost cutting thing like a couple diodes to drop Vcc voltage or can't afford to add proper bypass caps, make the footprints anyways. Most of us are going back and fixing this stuff already. Just make these things easier to do in the first place. Lastly they need to make a note on the product about where to find and download the source code. They have nothing to protect here. These are bare bones products without any real competition in the market. Just make it easy for the community to make use of the thing. Not to bring politics into this (I'm not stating my viewpoint on the subject here, it's just an observation),... but selling an open source product that includes access to hackable hardware and software as a general policy would be about the most pro-socialist kind of neighborly thing possible. I'm surprised someone hasn't figured out something like this and implemented it as a general standard for products from China. -Jake
@voltlog
@voltlog 5 років тому
China has a different culture when it comes to designing, manufacturing and selling stuff, it's not easy for them to think and see things how we see them. "946C" is just a model number, it doesn't specify the max temp, it's not possible for this plate to go that high. slight variations will be present on this plate, at least until it equalizes temperature across the plate but a few degrees shouldn't matter much for the prototypes that are going to be assembled on something like this.
@UpcycleElectronics
@UpcycleElectronics 5 років тому
@@voltlog Thanks for the info and perspective. I was thinking about trying a little cooking skillet from a second hand store for my first reflow setup. They usually come with a top cover as well so that adds an extra level of potential use and temperature control. I was thinking a combo like this with a tuned PID control board could make a useful precision setup. I know about the toaster oven Reflow projects. Thats an option. Andy Brown even has a setup using a halogen lamp and controller. A skillet would just add the little temperature dial built into the power cord, so there would be a max temperature failsafe....although I would probably just add a thermal fuse/switch. Any thoughts on why a small skillet wouldn't work? That setup could also be scaled as cheap consumer skillets are available in larger sizes than any copper clad I can afford to play with. -Jake
@voltlog
@voltlog 5 років тому
@@UpcycleElectronics I was thinking at a cooking skillet myself, before this opportunity turned up. It will work just fine, just pick one that comes in the shape and size you think will work best for you. The flat aluminium top of the hot plate looks nicer than what you get with a skillet and you also get a default controller board with the hot plate but that shouldn't be an issue for a maker/hobbyist who should be able to put something together to control the skillet temperature.
@anenglishmaninbrazil3212
@anenglishmaninbrazil3212 5 років тому
you must mean Weller lmao
@NiHaoMike64
@NiHaoMike64 5 років тому
For preheating a PCB that already has components installed on both sides (rework) and therefore has to be elevated above the plate, wouldn't it work better if the plate was black? (Grill paint would probably be a good choice.) At work, the usual rework procedure is to set the hot plate to 150C (the board on a holder that's elevates it about 1cm above the plate) and use a heat gun or iron to actually melt the solder.
@voltlog
@voltlog 5 років тому
For double sided pcbs, with no contact, one of those IR heaters works best. In the case of this simpler hot plate, heat could couple through other parts like shields. I've never tried grill paint, and I'm not sure how much of a difference it would make.
@jasonmhite
@jasonmhite 5 років тому
I don't think color would matter much, most of the heat transfer in that case is gonna be by convection, not radiation. I don't think it'd work very well for heating an elevated board either way, though, as it's designed for conductive heat transfer.
@RandomHacks
@RandomHacks 5 років тому
17:32 hahaha true true
@ManofCulture
@ManofCulture 5 років тому
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