Topics

1

General Mach Discussion / Using rg-59 TV cable for home and limit switch(s)

« on: October 11, 2011, 03:32:21 PM »

Has anyone used TV cable for limit and home switch wiring.  It is totally shielded and a single conductor for series switch setup...the downside?

2

General Mach Discussion / homed axis (XYZ) DRO does not read zero

« on: October 11, 2011, 02:13:00 PM »

Can't seem to get it right:

I referenced all and the machine completed as expected, however, the DRO are not showing zero.  I cannot figure out how to get them to read the home value.  I am trying reference the machine so the cutting area can be moved away from the home(s).  I am expecting the DRO to read zero on all axis.  Yes?
thanks
geo

3

General Mach Discussion / series limit switch configuration using one for the home as well

« on: September 19, 2011, 12:48:44 PM »

The documentation indicates that limit switch(s) can also be assigned as a home switch.  I have all limit switches set to port 1, pin 11 (in this case) and used the autoset for each.  Using limit switch only configuration, the system identifies the switches and they work as expected.  Assigning one on each axis as a home switch will cause the axis to begin to home, but when the switch is hit, the system just reacts as a limit switch and will not back off....any suggestions

thanks
geo

4

General Mach Discussion / change machine direction of arrow controls on keyboard

« on: September 18, 2011, 11:20:43 AM »

Is there a way to change the machine directional movement to match the arrow direction of the keyboard (jog only)
thanks
geo

5

General Mach Discussion / Can't get this hybrid stepper to run properly

« on: May 18, 2011, 02:21:02 PM »

Howdy:
I am trying Mach3 to see if it will drive the hardware we are using.  As you might expect, we are having some problems getting started.  The main problem we are having is rapid movement and signal crosstalk.  The equipment we are using is new:

nema 34 hybrid stepper(s)  WT85STH151-3004A (bipolar) 1600 oz (Wantai motor)
2ph stepper motor driver(s) SD-2H086MB
24vdc/8.5amp power supply

We trying to develop a 4 axis prototype device with little experience in CNC hardware.  Our device has a requirement for rapid positioning and we cannot seem to achieve more than 200in/min  (500 steps/200in/min setting using the software [motor tuning and setup]).  Any step settings higher than that or in/min cause the rotor to chatter and become static and stop turning.  We have tried all combinations of dip switch settings (driver) and software settings (motor tuning) with the same results. 

Question:  Does the motor tuning in Mach3 negate the dip switch setting on the driver....must they be the same?  Thanks much for any suggestions.

nubie
geo