Topics

1

General Mach Discussion / Mach 3 and feedrate

« on: March 12, 2007, 03:11:37 AM »

Hello All,

I downloaded the newest Mach 3 v.2.055 tonight.  While testing it out I realized that the IPM did not correspond to the DRO and the actual time that passed.  Note that I was running the software exactly as downloaded and that it was not hooked up to a machine.  At first it seemed the feedrate was running at half speed (i.e. the feed rate was set at 120IPM but the DRO only read 60 inches after one minute).  I then restarted the program a little later, reviewed settings (I made no changes) and then tried the test again.  At this point the opposite occurred (i.e. the feed rate was set at 120IPM but the DRO reached 120 inches after only 30 seconds).

Am I missing something?  I would think that if I coded the feedrate at 120IPM that it would take one minute (plus or minus a few seconds) to go 120 inches.  The G code I used to test this was very simple G1 X120 F120.

Thanks in advance for your input.

David

2

General Mach Discussion / Pulse Coder- Way too many wires!

« on: March 11, 2007, 03:05:14 AM »

Hi all,

So I was tearing my machine apart and strategizing my retrofit today.  Things were going along fine until I took a close look at the wires coming from the pulse coder.  I was expecting anywhere from 4 to 8 wires depending on what type of pulse coder I have (single-ended or differential encoder).  However, there were 20 plus wires!  I am hoping one of you guys could take a look at the pics I posted below and let me know what I am dealing with and how I should handle these various wires.  Thanks much!

Motor:  Fanuc Model 0 DC Brush motor
Encoder: 2500 Pulse Count
Excit. Perm. Magnet
RPM: 2000
Volts: 56V
Cont Amps at Stall: 12A
Torque at Stall: 2.7Nm

3

General Mach Discussion / Is there a difference between a pulse coder versus quadrature encoder?

« on: February 22, 2007, 02:17:27 AM »

Hello All,

I am strategizing the retrofit of my Enshu Accu-mill and have a question about the encoder.  The P100 from Skyko states that it needs a quadrature encoder.  My controller manual states that I have Fanuc Model 0 DC Servo motors with built in pulse coder.  Are pulse coders the same as quadrature encoders?  If not, how can I determine if they are quadrature?

Thanks,

David

4

General Mach Discussion / Fanuc 3m Model A and Mach 3

« on: February 14, 2007, 01:50:49 AM »

Hello all,

I have an Enshu Yuasa "Accu-mill" Model AM-1547 with a Fanuc 3M Model A controller.  This machine and controller is in pefect working order.  However, the controller only allows me to program two axes to move simultaneously.  I would like to use Mach 3 to make the machine capable of controlling all three axes simultaneously and to use additional (more modern?) G code and M code functions.  I have little to no experience in these things but I have all the manuals available for the machine and the controller.  Can I use Mach 3 to control all three axes simultaneously and to use additional G code and M code functions?  If so, what will I need to do to accomplish this?  I am not sure what you would need to know to answer this completely so I have listed some specs below:

Controller - Fanuc 3M Model A
Least input increment = .0001inch
Controlled axes = 3 (XYZ)
Simultaneous Axes controled: 2 axes (XY, ZX, YZ)
Feed Speed (xyz) 0.01 to 150 ipm
Rapid Traverse (x and y) 300 ipm (z) 150 ipm
Feed motors (3):  Fanuc Model 0
Automatic acceleration/deceleration: Linear for rapid traverse, exponential for cutting feed
Servomotors: Fanuc DC servomotors
Servo amplifier: 6 phases (3 phases full-wave), SCR drive
Position detector: Pulse encoder
Power Supply: 3 phases

Any help would be greatly appreciated.

Thanks!

David