Topics

1

General Mach Discussion / THC plasma button on mach3

« on: December 14, 2012, 02:13:24 AM »

Hi.
I own an CNC Plasma table.
I keep forgoting activate THC sensor button after Mach3 launched.
There is a way to activate automaticaly or remain activated after previous run?

2

General Mach Discussion / Dynamic control of cutting speed

« on: October 20, 2012, 01:39:12 AM »

Is there a way to dynamic control speed (with potentiometer) for plasma machine?

3

Show"N"Tell ( What you have made with your CNC machine.) / Plasma table ohmic sensing

« on: October 19, 2012, 05:15:40 PM »

I have Diy plasma table with capacitive sensor. Main problem is when machine is cutting on sensor ring is sticking dross, so i have to stop the cutting process and clean sensor ring just because sensing is not working precise or not workin at all.
Is very annoying when i have to cut thicker sheets because i have to clean sensor ring more often.
Can anyone build his own ohmic sensing?
If yes can share informations?

4

General Mach Discussion / sped between cuts

« on: February 01, 2012, 12:49:00 PM »

1. Is there a way to increase speed between plasma cuts??
Cutting is at 1200 mm / min and mmmmmmving from one cut part to another is 1200 mm/min too
Can i change the moving speed ?


2. When i cut the toch is lifting from 1,5 mm to 4 mm. But if the metal sheet is bent then when not cutting the THC is not sensing the sheet and 4 mm in a point may be -2 mm in another point and torch is touching the metal sheet. Can I increase lifting height?

I'm using sheetcam an mach
For now i'm using Mach3 Flame with THC postprocessor
I have capacitive THC

5

General Mach Discussion / Controling multiple tools

« on: December 31, 2011, 03:45:31 AM »

I have my plasma table controled by Mach and i need to add laser pointer and a marker tool for drilling aid (3 different outputs)
The problem is the tools will "cut" in different places.
Is there any way to "move" the xy position according to each tool to do the coresponding operation as it should?

6

General Mach Discussion / Mach3 and THC Problem

« on: December 12, 2011, 12:12:38 PM »

I have Capacitive THC installed on my table. I'm very satisfied on the performance (at least at cold run)
BUT
When I run a cutting program it moves Z axis  in position and then XY motors stops. The only thing makes them run is to minimise or maximise distance between plate and sensor ring and then motors start to run until arive in position to cut and stops again.
THC inputs are:

Torch Up
Torch Down
In position
Probe (or Touch Plate)

Can anybody help me with some info?

7

General Mach Discussion / CAPAITIVE THC PLASMA PROBLEM

« on: November 16, 2011, 10:14:33 AM »

I have a problem with inputs to Mach3.
I have a height sensor (THC) in a plasma cutting machine that emits four signals:

Torch UP
Torch Down
Torch ON (given by a capacitive sensor which considers optimal cutting distance)
Probe (Touching the board)

Now ... Depending on the condition that the z axis is found to give an appropriate signal pin MACH3 attributed to the state and activity is 15VDC and inactive is approximately 3.2 VDC at about 100mA

The downside is that  MACH don't read input state even though I tried both direct connection to the parallel port and breakout board.

Initially I thought that my parrallel port is broken but I checked the input port of MACH3 with Autodetect Inputs and both directly and through BOB works very well.
Can anyone tell me as to why I do not see the signal from the THC MACH3?

Sorry for my bad English
Thanks