Messages

201

Show"N"Tell ( Your Machines) / Re: Zero gravity Z

« on: December 03, 2013, 07:01:00 AM »

This is a gantry router I have.  Doesnt sound like you are familiar with the concept.

I am familiar with the need to counterbalance heavy weights which need to be moved vertically by steppers, my mill has a 1Hp 3 phase motor and VFD mounted on the head and is counterbalanced 50/50 by a counterweight and a gas ram.
Part of the process of upgrading the motor and adding the on-board VFD was to adjust the counterweight such that the head could be moved up or down by rotating the ballscrew with my fingers, thus ensuring that the stepper did as much of it's work as possible to move the head and as little as possible to hold it up against gravity,

  - Nick

202

Show"N"Tell ( What you have made with your CNC machine.) / Re: breakout+driver

« on: December 03, 2013, 06:07:09 AM »

My Physics teacher used to include a question about the speed of electrons in wires to catch people out, the speed of the Signal is close to the speed of light but the actual speed of the electrons moving in a conductor due to an EMF and neglecting small random movements is actually very low.
In a 1mm diameter conductor carrying 1 amp the average speed of electrons measured over a 1cm length of the conductor is in single figure mm/min.
There's lots of 'em in there (something like 8.4*10^22 electrons/cm^3) and current is a measure of the volume of electrons moving through the conductor,

 - Nick

203

Show"N"Tell ( What you have made with your CNC machine.) / Re: breakout+driver

« on: December 01, 2013, 06:59:55 PM »

USB is all about data transfer and not about control & timing, you can't drive your steppers via USB as the timing to do this isn't available with USB as it is with PP, what you can do is send information detailing what you want the steppers to do to an external controller which deals with the timing to run the steppers, so as Bob has said you need to buy an external controller.

204

General Mach Discussion / Re: How have you installed your DB25 in your Panel?

« on: December 01, 2013, 06:50:30 PM »

If it's inside the panel and appropriately supported I can't see it being prone to damage,  How tidy the wiring is will be entirely under your control, tywraps, suitable supports and well ordered cable routing can make the most impractical situations safe, tidy and neat.

205

Show"N"Tell ( Your Machines) / Re: Zero gravity Z

« on: December 01, 2013, 06:08:01 PM »

Which motor? The spindle motor or the Z axis motor?
I can't see why cutting power to the spindle motor would affect Z position. Equally confusing is why power to the Z axis would be cut on E-Stop as this would cause an unsafe drop and potential crash of the spindle.
My mill E-Stop uses one contact set for VFD spindle E-Stop and one contact set for Mach3 E-Stop, neither of these would allow Z to go out of control, it sounds wierd!

206

Show"N"Tell ( Your Machines) / Re: Zero gravity Z

« on: November 30, 2013, 07:55:03 PM »

Does your E-Stop cut controller power and this is why Z can drop if unsupported?

207

General Mach Discussion / Re: DB9 Connectors for Limits / Motors

« on: November 30, 2013, 02:18:42 PM »

Use 1 connector per motor, print your wiring convention, laminate it and stick it under the box.
If you ever have a motor, driver or other axis fault you'll bless yourself for giving you the opportunity to easily swap X, Y, Z or A  to Y, Z, A or X to identify the fault,  using 2 pins per motor connection will halve the connection resistance and halve the current through each pin which can never be a bad thing,
ATB,
Nick

208

General Mach Discussion / Re: computer keep on switching of when the plasma ark(spark)

« on: November 26, 2013, 06:20:17 PM »

THANKS NICK. THE PROBLEM IS THAT MY INVERTER MODEL IS A DZB312 AND ALL THE INFO I CAN GET
(USER MANUAL) IS FOR A DZB300.

The 300 series have the same basic connections you've quoted, AC input and 3 Phase output nomenclature is industry standard and the same as my Siemens drives, this gives you the basics to be able to get the drive powered up and connected to the motor.
Do you have an operator panel? If so what does it display when powered up?
With an operator panel you have a good chance of working out how to access and set parameters, the default values of some will help to identify some of them.
Once you get this far you will be able to compare the available parameters to those of the 300 series,

 - Nick

209

Newfangled Solutions Mach3 Wizards / Re: wizard nesting

« on: November 26, 2013, 07:41:40 AM »

"It's a learning and growing experience"

as my Aunt used to say 

Her other favourites were, when dealt a ropey hand "It's all part of life's rich tapestry" and when it was raining Stair Rods "It's just a bit of Sea Fret" 
Auntie Shirley also gave me the best BBQ a man can have, a Char Broil Gas BBQ.

 - Nick

210

General Mach Discussion / Re: computer keep on switching of when the plasma ark(spark)

« on: November 26, 2013, 07:11:04 AM »

There's a manual here -

http://www.scribd.com/doc/84435382/Fuling-Inverter-User-Manual

Hopefully some or all of the information should be correct for most of their range, your supplier should be able to provida a manual or wiring diagram though.
All of my 220V input inverters have the live & neutral connected to the first two input phase terminals L1/R L2/S
To have Mach3 run the spindle you need to have a controller which supports this, the correct wiring between the controller and the VFD and the correct config withing Mach3,
Regards,
Nick