Messages

591

General Mach Discussion / Re: touch probe install on mack 3

« on: August 30, 2020, 07:40:13 AM »

Just a note...
Z zero is usually set at the top surface of the work rather than the table surface. This way +Z is above the initial work surface and -Z is below the initial work surface.

Tweakie.

592

General Mach Discussion / Re: touch probe install on mack 3

« on: August 30, 2020, 06:45:49 AM »

A touch probe is used to set to set the tool in relation to the work surface (usually Z zero at the work surface) so Z homing is not required.

Tweakie.

593

General Mach Discussion / Re: Emergency estop Active

« on: August 29, 2020, 03:48:25 AM »

Unfortunately I have no other suggestions other than perhaps thoroughly check all your cables and connectors for damage and also check your PC and control box for dust / contamination.

Tweakie.

594

German / Re: Mach3 mit USB-Steuerungplatine Probleme

« on: August 28, 2020, 07:17:33 AM »

Ja,ich könnte es mit XP probieren.
Windows 7 mit 32 Bit müßte ich mir erst besorgen.

If the PC is 64bit then the RnR plugin may not work even if a 32bit OS (WinXP) is used - you would have to try it and see.

Tweakie.

595

General Mach Discussion / Re: Emergency estop Active

« on: August 28, 2020, 07:06:44 AM »

They would be switches (or proximity sensors) which input to Mach3.
Do you have an Estop button on your machine ?

Tweakie.

596

Mach3 under Vista / Re: Mach 3 stop mid job

« on: August 28, 2020, 01:49:03 AM »

Hi Alex,

A freezing issue has been reported before on the forum and from memory it has always been when using Win7.

Perhaps a stupid question but could you possibly revert to using WinXP ?

Tweakie.

597

General Mach Discussion / Re: Emergency estop Active

« on: August 28, 2020, 01:42:50 AM »

My first thought would be an input wire (limit switch, home switch, Estop, probe, etc.) disconnected or bad switch.

Tweakie.

598

General Mach Discussion / Re: touch probe install on mack 3

« on: August 25, 2020, 04:47:59 AM »

If your limit switches are wired N.C. (normally closed contact) then just connect all three switches in series and then connect to just one input.

(If your switches are wired N.O. (normally open contact) then the switches are connected in parallel)

Tweakie.

599

G-Code, CAD, and CAM discussions / Re: CV and exact stop

« on: August 25, 2020, 01:43:45 AM »

It appears that CV is causing the issue and to confirm this run the same file in Exact Stop mode ( G61 ).

If this resolves the issue then your motor tuning should be adjusted to increase the Acceleration and reduce the Velocity for both the X and Y axes (saving the changes). Do this in stages until you obtain acceptable results when running in CV mode ( G64 ).

Tweakie.

EDIT; There is more information of how CV affects the toolpath in David Bloomfield's .pdf file which can be downloaded from here;  https://www.machsupport.com/forum/index.php?topic=7923.0

600

General Mach Discussion / Re: Which wires in the control box should be shielded?

« on: August 25, 2020, 01:29:10 AM »

It’s not an exact science so there are differing opinions but here is my take…

All signal inputs (Estop, limit and home switches, probe, etc) should be connected with good quality shielded cables with the shield connected to a single point, ‘star’, Earth at the controller end only.

There should be no ‘Earth loops’ or ‘GND loops’ anywhere in the system wiring.

The VFD inverter should, if possible, be located away from any input wiring or un-shielded electronic circuitry.
The cable between the inverter and the spindle should be shielded with the shield connected to Earth at one end only.
The VFD should ideally have an RFI filter fitted in series with its mains input.
The VFD manufacturer’s instructions regarding earthing / grounding (assuming they are supplied) should be followed.

Stepper and power wires do not need to be shielded unless there are special circumstances.

The last ½ inch or so of un-shielded cable is seldom a problem and should not be of any concern.

Tweakie.