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Messages - chad

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General Mach Discussion / Re: g-rex spindle analog
« on: August 18, 2006, 08:10:48 PM »
Never Mind ;)  I got it. Try enough combinations and eventually you will find the correct one...


General Mach Discussion / g-rex spindle analog
« on: August 18, 2006, 08:02:18 PM »
Hi All,

I can't fingure out how to enable the analog out of the g rex.  I have the scope hooked up to analog 4 and have tried everything I can think of to get it to work with no luck. Can anyone give me a quick 1,2,3, on how to get it working??


General Mach Discussion / Re: Just introducing myself
« on: August 15, 2006, 09:37:45 PM »
I agree totally with Brian. You need to install mach 3, lots more goodies and 90% of people here are running 3. It is easier to help when we are all on the same page, er- program.

Depending on you level of noobieness the g code might not make sense. So here is a little explanation of what he has written.

G01 X1.0 F30.0

G01 (linear interpolation) X1.0 (move x axis 1 unit (inch or mm, whatever you have setup)) F30 (feed rate units per min, in this case 30)

A G0 X1.0 would move the machine as fast as you have the motors tuned in the motor tuning diag to x1..

In mach 3 there is a button at the bottom of the screen by the reset button that says gcodes, click that. It is a list of the gcodes that mach supports and a brief desc of what it does. Google can give more details on the codes and their usage.

Or ask for help here.

Tangent Corner / Re: Urgent help needed.
« on: August 11, 2006, 03:10:57 AM »
That is really and truly terrible!!

But not as bad as this!


Mach3 and G-Rex / Re: Future of MachIV?
« on: August 09, 2006, 07:17:50 PM »
Hi I am not the devinitive sorce on all that is mach 3+ plug in but i am running it and can give a couple of answers.

Probing, no
home, limits, yes
jog, yes

it will do everything that mach 4 will do. and seems to be more stable. As far as i have heard mach 4 is not fgoing to get any more code work, everything is going to be mach3 and the g100 plug in


General Mach Discussion / Re: wireless mach
« on: August 08, 2006, 12:43:17 PM »
As Brian said in another post "nope, sorry won't work"

By all rights mach shouldn't work under windows at all. Art has taken some liberties with the OS kernel to get a steady pulse stream out of the parallel port. More or less he has taken control of the parallel port away from windows and is flipping bits by hand. Anything other than a cable between mach - parallel port - machine is going to use windows to handle the data.
The other problem, Most rf transmission systems like 802.X is packetized ip. Not suitable at all for things that need a rock solid pulse train, like step and direction for machining.

Now you are probably saying to your self, but what about the g-Rex, it is Ethernet. Well mach is sending a X10 and the grex probably sends a ack, OK Moving, then it counts and sends the pulses. I probably shouldn't be, but i am using my grex wirelessly with almost no problems. 


General Mach Discussion / Re: VFD recommendation
« on: August 06, 2006, 02:16:14 PM »
HI Graham,

I didn't read your post very well ( it was late), VFD is usually associated with AC motors. My baldor vfd won't do anything for you. I think it is going to be hard to find what you want. I did a little digging and most of the DC drives i can find in that voltage and hp rating are intended to run motors with field coils. I haven't personally dealt with these but from what i have been reading it looks like the filed coils are basically replacing the magnets in a permanent magnet brush motor. I don't think these will work for your motor.

Can i ask what you are using these on? My guess is is a lathe. So based on that guess i am going assume you want to do some CSS , perhaps some ridgid tapping, or maybe just get better results with thread cutting.  Again just guessing.

If you are primarily going after CSS then i would suggest you find a VFD with pwm input,  open loop vector control and single to three phase converter built in and replace your dc motor with a different 3 phase AC motor.

Tell me a little more about what this motor is on.  How many wires coming off this motor , is there a variable speed control on it now?

Is it an Asian mini mill or lathe with a speed control?  if so this might work for you ..


General Mach Discussion / Re: VFD recommendation
« on: August 05, 2006, 10:38:28 PM »
I have a baldor 5 hp H2 on my knee mill, It has been totally rock solid, it also has a nice open loop vector mode that keeps a pretty constant torque or speed.


Show"N"Tell ( Your Machines) / Re: Chads new machine
« on: August 03, 2006, 07:07:50 PM »
Well that is a good question.
First I started with the y-z plate and mounted that to the rail trucks then i bolted the rails to the tube, this auto-magically aligned the rails to each other based on the mount plate.  I then slid the plate down and tack welded the support bars as i went. As for the bars to the beam i started with the highest grade steel i could find, i then torqued the bolts to 80 foot lbs. The rails are 45mm hardened steel,very strong and ridgid. I was hoping the rails would make the beam conform to them, i think it worked. It travels very smooth with no apparent binding. If the rails have some hi or low spots because of beam fluctuations i should be able to shim it out. I am only trying to hold a couple of hundredths tolerance, there will be much more slop in the later fiberglass process on the parts.


Show"N"Tell ( Your Machines) / Re: Chads new machine
« on: August 03, 2006, 02:03:47 PM »
JDolecki, lol ;)

After this project i would be lucky if i can get my partners to fund a pizza and beer night :)


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