Thread: Another chinese CNC router

Geoff
Good to hear your having a win
Won't be long now
Cheers Tony

yes we all remember satisfaction of the " 2nd running " after tossing the china drivers and getting a mob of gecko's to do it properly

changed out your axis 4 core cables?( any sign of feral axis movement is the china 4 core cables braking , 10 hours in mine ) just a heads up , over 200 hours and still going on "jaycar 4 core "

please put a dam good earth on your machine before you turn on your spindle

Bolt the VDF to the top out side of the pc case ? , the pc case will shield the low voltage stuff , believe it or not , after 1 day of running on my pc case set up , my geckos turned up and i changed my set up ,to a cupboard with positive air pressure electronics are above and separate enclosed machining area ( machining carbon fibre , carbon is conductive , my reason )

lol i just read this thread from start to end

ken
ps , what do they call a mob of gecko's ??????

PPS google came up squat , looking at my walls , they dont like to be together at all , so a " brawl " of gecko's would best fit

The new Triton Range CNC eh Geoff

Quote:
Originally Posted by snowyskiesau
It 'aint pretty but it's colourful.

So it's pretty colourful then.

Originally Posted by SawDustSniffer

ps , what do they call a mob of geckos ??????

PPS google came up squat , looking at my walls , they don't like to be together at all , so a " brawl " of geckos would best fit

Ok Ken. You have just made a made a contribution to the English language.

I hereby declare that from here on,the official collective noun for geckos is "a 'brawl' of geckos"

Originally Posted by Bob Willson

Ok Ken. You have just made a made a contribution to the English language.

I hereby declare that from here on,the official collective noun for geckos is "a 'brawl' of geckos"

another one i was gonna say was a " homann of gecko's " , describing the largest group of them together i know about

Originally Posted by wheelinround

The new Triton Range CNC eh Geoff

I hadn't thought of that but, yes, the colour is pretty close to the T range.

I chose the colour because Bunnings had Knights spray cans on special and the only other colour besides orange was blue. Covers for the enclosure are black (goes with anything does black..)

Originally Posted by SawDustSniffer

another one i was gonna say was a " homann of gecko's " , describing the largest group of them together i know about

More generically i.e not specific to geckos is perhaps, a lounge of lizards?
A frustration of geckos might refer well to the problem of getting that Fault light out

I didn't get the spindle going today, I got sidetracked with a chainsaw

I did spend a frustrating half hour trying to find a noise in the 6040. It was a regular 'beat' in the X axis (and as is turned out, the Y axis but I didn't think to check that) as I moved the gantry in either direction.
Assuming a mechanical problem, I adjusted everything I could to no avail. Rebooted the computer and noticed that SpyBot was running. This is not really needed as the machine is not on a network so decided to stop it.

Magic! the noise has now gone away! not sure what SpyBot checks every second or so but it interferes with Mach3 when it does it.

EDIT: It's working but it doesn't sound right. Nothing loose as far as I can tell. Have a listen.

http://www.youtube.com/watch?v=Ul2VF...ature=youtu.be

Might have to send the router plate back for machining Geoff.

The sound is like if two alli parts are rubbing

OR

the echo coming through the gap and some vibration if as though sitting on a table and it needs a damper under it piece of non slip matting or cork.

Certainly some machining required! One problem has been found at least.

I removed the motor from the Y axis and found the bearing is not secured, the outer race turns freely in the hole bored for it. (I say bored, gnawed might be more accurate!).
There's a good 10-15 thou clearance where there should be none.
Looks like the next job is to get the mill or lathe sorted out, another delay!.

I'll tackle the X axis next as it also makes the same noise.

EDIT: X axis similar but not as bad.

One the motor end of the ball screw, there is a single bearing but on the fixed end, there are two bearings. No way to tell if they are angular contact bearings but I doubt it . Bearing size at the fixed end is 22x10x6 and at the motor end 22x?x8.

Another test.
While I've got the motors removed, I thought I;d test them by themselves.
I'm not sure what a stepper should feel/sound like but they seem a bit rough to me. I've tried different ports on the G540 but all are the same even with different motors.

I'll play around with motor tuning a bit and seem if I can improve things.

In setting up Mach3, I used the G540.xml file from Gecko - got to be right I thought and didn't check the motor tuning that much (OK, at all)
. By default, it has number of Steps per set to 20000!

Assuming an RM1605 ballscrew with 5mm per revolution, 200 steps per revolution for the stepper . Using the Mach3 calculation:

Mach3 steps per unit = Mach3 steps per rev x Motor revs per unit

200 x .2

Gives a result of 400.

The motors certainly sound a lot better

I might fix the bearing issues before I go much further.

Originally Posted by snowyskiesau

in setting up mach3, i used the g540.xml file from gecko - got to be right i thought and didn't check the motor tuning that much (ok, at all)
. By default, it has number of steps per set to 20000!

Assuming an rm1605 ballscrew with 5mm per revolution, 200 steps per revolution for the stepper . Using the mach3 calculation:

mach3 steps per unit = mach3 steps per rev x motor revs per unit

200 x .2

gives a result of 400.

The motors certainly sound a lot better

I might fix the bearing issues before i go much further.

200 *0.2 = 40