For the Problem of Driver shelf oversize on Pill,with risk of short.
We can try to screw a P60 brass on the cometa pill instead the stock ring,
then put the driver
hope will fit.
So far, I noted following issues that one should take a look at before actually using the Cometa:
Short circuit risks:
- solder joints on LED aluminum board (potential for bad solder jobs)
- sharp edges on the pill that might damage the insulation of wires
- insulation disc on the rear side of the pill is crucial as the outer rim of the pill might cause shorts when in contact with the positive pole of the battery
- driver pocket / driver shelf oversize (approx. 19-19.5mm) while pass thru hole is about 17.8-18mm => 17mm driver can be moved over enough to short out on one of the SMD’s or positive lead
- MCPCB isn’t screwed or glued => risk of board-rotation and shearing-off of leads when tightening the cover => Fix: tighten the MCPCB by mounting two screws onto it
Operational malfunctions/ flaws:
Turbo drops out to moon after exactly 10 seconds => Fix: adding a 5 Ohm resistor between led+ and both C1 and D1 or set off the temp / heat setting
- Rattling inside the head due to zoom mechanism => Fix: still in clarification / adding high-viscosity lubricant, o-rings or kapton tape might help
If there's anything more to consider or if something needs to be corrected in my above mentioned points, I'll be glad to collect any further input and summarize it here. 
No I don’t think that you do. It is quite visceral, and some behaviour just is not acceptable, even after a few years have gone by.
Watch https://www.youtube.com/watch?v=yzLT6_TQmq8 for a more eloquent expression.
The girl from Tiger Bay expresses it more clearly.
Well, what can I say ? its different.
Tom Tom, enough already. You have made your points. Stop calling name on Cometa most people here enjoy having. The groupbuy was a mess, don’t blame the flashlight. I bet you don’t buy from Banggood anymore, but that’s your decision.
Bottom line it appears is to treat the Cometa as if it were a host. :student:
I think on some drivers the turbo step down because the programed temp is to low?
Also i never heard about the LED rotating its common for zoomies to not have the MCPCB screwed down by actual screws. This system is what is used on most zoomies?
Most likely someone have tighten the alu. disc too much and rotated the MCPCB. Outcome of this MCPCB rotation was either scratched alu disc and shorted with MCPCB solder blobs, and/or led wires get cut by sharp edges of the brass pill and shorted too.
It should have been hold down by two screws to avoid this, but manufacturer cut cost on these screws and tapping.
One other way to think about it, is to buy it for spite.
For every Cometa you buy at 15bux, you’re denying a sale to some other sucker at 47bux. :smiling_imp:
I bought 2 this time round and 1 on original group buy , added some thermal grease to MCPCB then kapton tape over solder joints.
After this it works great for what it is, it is a cheap zoomie with good performance. I have yet to see anything throw like this for £12 inc battery ,Tom Tom if you know of anything that can out flood and out throw this for £12 ($15USD) inc battery please let us all know.
Yes it’s not a torch for everyone but for them who will do very basic mods, it’s a great torch at a great price.
:+1:
Edit: Shouldn’t have posted that, I apologize
I just got 2 cometa’s today and everything that was wrong with them has been fixed in some way or another. There is a plastic insert on the head side of the battery (well made, milled plastic insert) and what is normally the reflector (don’t know what it is called) has been milled for relief of the solder blobs. Solder work is perfect also. For $15 or $16 these are a bargain if you like zoomies. I’ll try and post pics later.
+1
Awesome deal!
Wow, guess it’s a good thing I bought 3 of them, they are only 49% off now at $47.99 each. Normal price is $96.00 at Banggood. How much were they during the initial group buy? I wasn’t apart of this fabulous forum then.
Only because some fat-fingered idiot, or automated script, pressed the wrong buttons.
Now corrected.
Good luck to those of you who snapped a “bargain”. Maybe even with some “free” cells.
Yes, I am just a tiny bit jealous. But also glad that I missed this. Life is too short to be fixing these shoddy knock-offs up, when you could do so much better, but by all means crack-on, those of you who have time on your hands, and are really cheap.
Edit: “Nevermind the Quality, Feel the Width.” An oblique reference.
I’m out of this thread now, you will be pleased to hear.
Summers Eve
They are worth no more than $30, that’s if you get a good one.
Which was about the group-buy price, except that they were all ludicrously bad. In every possible way. And still are, despite some factory re-work. As you will realise from the comments here.
Just do a search for e.g. “Jaxman Z1 Aliexpress” and buy the proper thing, at the proper price. This is a decent torch.
If you live in the first-world, why are you obsessing over perhaps an extra $20 to get the real thing ? That is, if you actually intend to use it, with a use-case, rather than just to add it to a collection to gather dust. Or as a curiosity.
Out now, I promise.
Good grief, can you just give it a rest ?