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Messages - havery

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General Mach Discussion / Re: Sp[eed Feed Variation
« on: March 18, 2010, 08:55:11 AM »
That explains it.  I have a G4 P3.0 at the start of the threading program and thats why it works. 

Thanks for the help Hood.  Where do we send the check?

General Mach Discussion / Sp[eed Feed Variation
« on: March 18, 2010, 07:50:54 AM »
On a lathe I converted over to Mach 3, I have an issue with feed speed when called from a program.  I am using feed/rev as the feed method.  If I step through the program, the feed speed is fine.  If I run the program the feed speed is very slow.  I can stop the program, restart the spindle manually then hit cycle start and the feed is correct.  I have not physically cut a thread yet but during air cutting the feed speed for a program with threading in it seems fine.  Can anyone shed some light on this for me?


Modbus / Spindle Control Brain for Modbus
« on: March 11, 2010, 09:31:43 AM »
I am going to use Modbus Plug-in and an M13 expansion board (CNC4PC) to control the spindle speed of a VFD.  I have the control wires for the VFD connected to output 3 and GND of the Analog Out portion of the board.  Arturo mentioned the use of a brain to control this output.  I downloaded and installed Scott's ModSpinOutControl.brn.  Can someone help me understand the logic before I blindly start using it?  How would I state the address for the analog out?  In the brain file I put in 4007 and it says this value is not valid.  Should this value be 4 of configuration 3 instead?  A screenshot of my Modbus Configuration is shown below. 


General Mach Discussion / Re: Axis Homing Problem
« on: March 03, 2010, 12:15:47 AM »
Hood, you were correct.  The axis zeroed out and then stopped due to limit switch activation.  I raised the debounce to 2000 with no effect.  Since there already was a 2nd limit switch installed, I set this as a seperate home switch and all is well.  I did not want do do this originally due to lack of inputs.  Hopefully I will have the ModBus up and running soon so that will not be a problem.

Thanks for the help......................again.


General Mach Discussion / Re: Axis Homing Problem
« on: March 02, 2010, 12:03:15 PM »
Thanks Hood, I will do that when I get home.  One question to help me understand: If the control software sees the switch closure as both a home switch and a limit switch closure, how does it decide what to do with the switch activation?  Is there a pecking order for actions or is the action determined by the command used when the switch closure is recognized?

I did change the Index Debounce level but this should have no affect on the switch closures, should it?


General Mach Discussion / Axis Homing Problem
« on: March 02, 2010, 10:33:21 AM »
I have a lathe I am retrofitting and I have a homing issue on the Z axis.  I have searched the posts with no luck.  The X axis homes and zeros fine.  The Z axis hits the limit switch and gives a "Limit Switch Activated " instead of homing and zeroing at that position.  I think I have the same setup on the X and Z axis with one limit switch being both the limit and home switch.  From the pics below the switches are both being seen as both a limit and homing switch by the software.  They are both setup to auto zero on home switch activation.  Any ideas why the Z axis would not home?

They were both working using version 3.042.029.  I recently installed 3.042.038 but I would guess it is something I have set wrong rather then a rev issue.  Xml is also attached.

Thanks for any help


General Mach Discussion / Gecko G540 VFD Output Help
« on: October 29, 2009, 02:15:41 PM »
I have a G540 unit and cannot get the voltage between the VFD Signal and the VFD Ground to change when I issue a M03 S## command.  I have searched the posts and cannot find the information I need.  Does anyone have a testing procedure for checking the parallel port and the G540 unit?

I have connected the + lead of a variable DC power supply to Pin 9 and the – lead to pin 7 of the G540 unit.  I apply a 10 volt signal and measure the voltage using a digital volt meter between pin 8 and pin 7.  The voltage continuously varies between ~.2 and .45 VDC before I send the M03 command.  Once the M03S15000 command from Mach 3 is sent, I see absolutely no change between pin 7 and 8.  The voltage continues to fluctuate between .2 and .45 volts.   Output 1 does change state and I can control a relay with this signal.

All other features of the G540 work fine; limit switches, outputs, motor drives, e-stop, ect…  I purchased the G540 as part of a “Boxed Kit” solution.  From the other posts I have read, I think this is a newer version as it has the external charge pump switch.

I will be controlling an AC router through a C-19 unit from CNC4PC.  The router speeds are from 10,000 to 21,000rpm.  The C-19 unit is functioning fine as I can apply a varying voltage of 0 and 9.2 VDC between the signal and ground connections on the C-19 and the router speed changes from min to max.

I think I might have a bad G540 unit but would like a testing procedure before I send it in for evaluation.


I have the following settings:

I attached the file for the prox sensor.  It is a three wire switch.  One wire connects to the terminal on the 504, one wire connects to the ground of the power supply and the other attaches to the +12V PS (which is a transformer I added to the control not the +12V from the computer like I previously stated).  The 12V solenoid attaches to the same ground, could this be the issue?  I did not see where the 540 inputs were limited to 5 volts.


I am using the Gecko 540 drive (http://www.geckodrive.com/upload/G540%20REV3%20MANUAL.pdf).  The limit switch's are connected to terminals 1 - 3 and the output is connected to terminal 6.

The limit switches are Nais UCP141 and the spec on the limit switches are 12 to 24 volts ±10%.  I am using the 12v signal from one of the yellow wires in the computer case to power them.  Can I shield them all together as exit the control or do they all need to be shielded separately?


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