I haven't used Lini's myself, I just included them as an example of good alternative drivers (such as Pminmo, Gecko, etc, etc) to the crappy Chinese ones.Originally Posted by itain
Cheers,
Ian
It's a state of mind!
another video from my experiments with 6040 Chinese machine.
this time i tried regular shielded MIDI cable.
the difference is huge!
also small test on the controller box
check this out:
http://www.youtube.com/watch?v=PxYAuC5ePcI]6040cnc part2 - YouTube
have fun watching
cheers
fox
its insane isnt it
I feel very strange.
I see a lot about the description of the noise, noise,
What kind of machine there is no noise?
Perhaps we are all at home,
The use of the environment is too quiet.
If you find current sound of the stepper motor，
This is completely normal,
This is subject to the performance limitations of the driver board,
Decay is set to 50%, the speed is set to 3000, which will have improved.
Many times I see someone mentioned the gecko drive
We have not used it, but I believe it is an excellent drive.
However, you use $ 240 worth of drive and a $ 30 drive.
Is not this ridiculous? $30=$240?
Of course, the driver of $ 30 still allows 6040 to play a good application.
We will later provide video.
For some users want better performance experience,
I suggest you buy the standard configuration of the machine,
You only need to add $ 50 to $ 100,
Such as 6040-S1500 ,6040-F800........
In addition, the TB6560 is a good driver. The engineers do not cry.
Admittedly, it has many versions,
$20 TB6560 is certainly better than $ 10.
$30, definitely better than the $ 20.
However, people always used to pick the cheapest, is not it?
We have very good performance TB6560 driver,
You could not even hear any current sound of the stepper motor is also very perfect. Of course there are better.
The question now is,
Foreign dealers who do not need better, because it would increase costs.
They even do not allow the machine YOOCNC identity.
I think that This is the consequences because of price competition.
We hope to hear more opinions on the machine itself。
After all, this is our focus.
The electronic part is just according to the order requirements,
There are too many choices.
We will select the right dealer to sell more high-performance machine configuration.
Thank you，
Thank CNCZONE,Do not these ads.
we have been talking here about electric noise. not audio noise.
I do agree with guys here that water pump could be less noisy. quieter.
machine from technical point of view is really really good. no doubt about it.
electronic part of it.... its hard to find any good part.
short story.
I have bought this machine to do some prototyping work. its cheaper to buy the machine that outsourcing work. and its way quicker.
but instead of actually doing any work on it, I'm trying to fix it.
i don't know how you can sell this machine as it is.
it DOESN'T work at all. or maybe i should say, that is just shaking?
my question would be?
what did you think placing 4wire cable without any form of shielding together with non shielded VFD cable ?
could you tell me if anybody run some tests? before you start selling them?
well, i did and it shows that VFD cable producing 60+volts in stepper motor cables. so its obvious that stepper motors go nuts.
please tell me what is the difference in the price of shielded cable versus non shielded? are you going to save so much money on it?
making machine unusable?
control box doesn't have any grounding. its made out of 4 metal pieces and plastic frame. there is no single cable connected to the case with ground.
by law if you use 220-240v, grounding a metal box is a must !
in you case you have to do this to prevent VFD noise to come inside the box.
machine is not grounded either..
turning on and off the control box might blow up stepper drivers. it has happen to someone here.
another part which i don't understand is. why when i turn on the control box, my motors start singing like birds? why you don't use sleep mode, and wake up motors once they have something to do?
When I'm designing something with stepper motors i always use sleep mode, to save power and stepper driver. its also saving drivers.
plus all the list of small things what somebody before did mention.
Maybe I'm a bit harsh, but I'm sick and tired paying lots of money for bad bad design. or something what is not working out of the box. in order to make work, I have to open it find a problem and fix it.
I just don't have time for this BS....
its easy
dont make the junk system and people wont order / buy it
make one that cost $20 or $30 more and 200% better and you wont have every one that buys the units complaining about them being junk
The machine is good generally, but if it doesn't work then cheap isn't cheap, it's just a waste of time and money!
The whole problem is that people who order these machines and then plug them into standard mains outlets in almost ANY country, are NOT able to use the machine because of the problems with the controllers. They DO NOT WORK. Simple as that. Not only that, without the earthing they can be very dangerous. It would be better to sell the machines without the controllers, as in most cases people end up having to buy a controller anyway just to get their machine working.
I got a price on just the controller box with the drivers (blue box) some time back, it was around $150 or so to buy, so if that cost was taken off the total price, I think you'd find people would buy more machines as they aren't wasting good money on a controller and box that won't work. They can then buy whatever controller they want. I undserstand you want to sell a "complete" system, but if it doesn't work, what's the point?
cheers,
Ian
It's a state of mind!
it seems some people here dont understand how a lot of stuff is made in china
you have dozens and dozens of small dirt floor slave labor shops making a single part they then send them to the next place that get supply's from several of the sweat shops and put them together and send them off to another place that gets supply's from several of the 2nd level sweat shops and put that stuff together and so on and so on and on and on
then you have the final product sellers
they have most likely never been the the same room as what they are selling so have no idea just how bad the final product is and don't really care because by that time the customer finds the problems the seller has your money and couldn't give a sh!t anymore
I disagree, I think most people would have a fair view of how stuff is made in China, and for the most part accept a certain amount of risk when purchasing drastically cheaper products.
What I take issue to is not the risk in buying these controllers, it's the pure fact that they are complete and utter crap, so any amount, no matter how little, paid is wasted, as you don't have the option of it failing 6 or 12 months down the track, it's already been pre-failed for you for free!
Generally I've found things work out pretty damn well buying from China, especially as most local sellers are doing nothing more themselves but re-brand Chinese products at 4 times the price. This is one of the glaring exceptions to the rule.
As an example does anyone remember the good old days when Carbitool had major market share and 1/2" router bits were sold in the $80-$150 range each, but now you can get the cheap Chinese ones that I've found last and perform just as good for around $2.50 for general purpose and around $15 each for specialty bits!
cheers,
Ian
It's a state of mind!
I must agree with you Ian. I have, over the years, bought a lot of stuff from China and i must say overall the quality has been good. Obvioulsy the noveklty items like clockwok money boxes are cr@p to say the least BUT the larger items which are more specialised are good and worth the money you pay. Like you also point out - there are local sellers rebranding and selling at 4x the price they pay.
I would rather take the risk and spend another 20% making it better than paying for a local guy to rip me off.
Howevern now it seems our country is REALLY turning the coin over and over and making sure they get EVERY penny out of us when we import. The CNC payment i went to do yesterday at the bank. The paper work involved WOW!! And then when i got home i have another 2 documents i need to complete which declares that i haven't spend or sent more than R1,000,000 in this financial year on international transfers.
I am thinking to pay the extra 4% on my machine and just use PayPal!!
I agree with your views.
But I do not understand,
From 2007, we began selling non-controller machine.
Until now, we have one-third of production is Does not contain the controller.
Surprisingly, these machines are sold to the place.
Some dealers are reluctant to sales,There is no control of the machine,May be because of the profits too little.
Therefore, I am very interested in a direct understanding of the foreign market.
In China, many manufacturers and sales companies are separate,
Because each has its own advantages,The sales company has a mature sales network can rapidly product distribution out.
If manufacturing companies want to establish their own sales network
This takes a long time and pay a terrible cost.
Therefore, only large companies have the strength to do so.
Every company wants to build their own brand.
However, if a customer,He got a big order,And the request can not be with a brand identity,Including price changes in configuration.
As a manufacturer, still do. This is no way.
Unless your product is unique.
I know that now China has very good engineers and very good technology. They still need better QA and branding.
this has been some good reading.
Ive been reading what ever i can over the last week on the 6040 to see if i would talk myself out of buying one. Didnt happen. This is the size, price and power that i need for a first machine.
from the information on the zone it seems all the 6040 shortfalls are easily fixed but i do have a couple of questions.
When switching to the g540, is it a simple as removing the old controller from the box and replacing it with this one?
if not what else should i be prepared to buy to get this thing moving?
and lastly. I read a lot about things not being grounded. Any suggestions on what should be grounded where?
thanks a ton
You need a good 48vdc power supply, some relays to interface the g540 with the vfd, some wires to connect stuff together and some shielded cables for the steppers and spindle.
All the shields should be grounded/connected on the source-end, so for the steppers, you connect the shield to the shield of the dsub-connector, for the spindle, the vfd usually has a dedicated ground screw somewhere next to the terminals for the motor (spindle),
you also need to connect the vfd ground to the housing on the g540, either with a wire, or by installing everything in a steel cabinet.
To what to connect the VFD-Ground=Terminal "E" if you stick with the original electronics for a while?
To what to connect the shield on the stepper wires in the original electronics?
(I'm replacing them with shielded wires at the moment. Also adding
shield-mesh to the part between stepper-connecor and stepper and
replacing the stepper connectors with shielded DIN ones. Especially for the
Z-stepper that is by definition very near the spindle cable.)
You can control the VFD directly from the computer via RS485.
It requires some settings on the VFD but no magic there.
Works fine with MACH3 here (1.5KW version).
Myself I'm switching to a USB board instead of the G540 because seriously,
LPT-ports are dying out and the RS485-version of the G540 isn't there yet.
EMI filter between spindle and VFD
While exchanging the cable between spindle and VFD I noticed that there is an EMI filter installed in the original cable.
However it is connected, so that the "LOAD" side is on the spindle and the
"LINE" side on the VFD.
Shouldn't this be mounted the other way around?
you say that like you think they have 1/2 a clue as to what there putting together for $1 a day
Just noticed I had the wrong cable end. It was the mains->VFD cable and was mounted correctly.
Had the same color as the VFD->Spindle cable.
Sorry.
ordered a yoocnc 6040 this week. After reading through all the posts about all the 6040's i feel pretty confident there is enough information and research done to make this small machine work properly.
while i waite for it to arrive i have a question about the computer itself. Im planning on running mach3. Should this machine be dedicated to only mach3? should i be installing the cad/cam software on it as well?
computer is an older
clereron 28ghz
2 gigs ram
512 vid card
running windows xp
my appologies if this isnt in the proper forumn area
Congrats on taking the first step!
I had the same questions when i started. However my setup is a single "c lean" PC to run the machine via Mach3 or NCStudio etc with nothing else on it actually. It is not connected to the internet or network and is purely stand alone with the usual drivers that it needs.
I do all the CAD/CAM work on my normal machine that i use for anything including games etc etc
The machine PC is absolutely dedicated. In fact i think the only other thing on there is an Anti Virus which i probably should remove.
Oh the machine specs should be ok for a dedicated machine.
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