Messages

41

Mach4 General Discussion / Re: Can someone please explain how to use Home offsets

« on: August 02, 2018, 07:35:32 PM »

Byrd,
I got what he wanted. I was only suggesting that it doesn’t get applied until you tell Mach to move to home and then it will move to X -3 as the home position.

42

Mach4 General Discussion / Re: Can someone please explain how to use Home offsets

« on: August 02, 2018, 01:00:39 PM »

Not using Mach 4 but try this. The DROs show 0,0,0 because that is where the tool currently is. Try sending the machine home after this and I would expect that it now moves to your desired location, and might or might not set the DROs to zero. Setting them to zero might be needed.

43

Mach4 General Discussion / Re: Run in parallel 2 Gcode files

« on: July 31, 2018, 09:42:46 PM »

No question, that is two machines and need to run independently. Second machine signals when it needs a board. First machine replies when the board has been delivered. Since cutting is likely to always take longer than labeling, throughput is set by second machine.

44

General Mach Discussion / Re: Z axis going deeper and deeper

« on: July 30, 2018, 01:39:13 PM »

The Z can be a problem because of the spindle weight and the fact that tools tend to pull down so the Z motor can’t lift the weight. A counterbalance gas spring may be needed.

45

Modbus / Re: New to PLC, using do-more PLC to control Lenze VFD

« on: July 19, 2018, 07:39:49 PM »

Explain what your goal is. I use Mach 3 and DoMore BRX which is a fabulous PLC. We talk Modbus to 7 VFDs at the same time. You can send me a private message if you like and I could send the code for Modbus from the PLC

46

General Mach Discussion / Re: Knocking X axes, whats going on ??

« on: July 16, 2018, 06:12:10 PM »

Bad motor coupling?

47

Show"N"Tell ( What you have made with your CNC machine.) / Re: Machinable wax gumming up my bits.

« on: July 12, 2018, 08:20:41 PM »

Your spindle speed is way to high. You are melting your way through.

48

General Mach Discussion / Re: centre part on table (probably a silly question)

« on: July 04, 2018, 11:43:05 AM »

You don’t need to home the machine unless you are using a tool changer or soft limits in most cases. I have limit switches that prevent a hard crash but they don’t require homing.

49

Mach4 General Discussion / Re: Implementation of physical buttons

« on: June 19, 2018, 10:16:05 AM »

If you are going to use all those inputs anyway I would consider not using selector switches and instead program 4 buttons as Radio buttons. Press 1 latch function 1. Press any other and unlatch what is on and latch the new one. On power up or reset nothing is selected. Use a DRO to indicate which function is active.

50

Building or Buying a Wood routing table.. Beginnners guide.. / Re: Vibration problems in my cnc router

« on: June 19, 2018, 08:47:23 AM »

Exact Stop is also an issue for circle cutting. If your Cam program does circles as short lines that could be problem too. That knock sound though suggests backlash compensation being applied at direction reversal and this will happen at quadrants of circles.