2014-04-14

CNC6040 updates

Just to give everyon an update:
This weekend I made a few modification to my larger CNC.

The new E-Stop button got it's cable properly mounted to the wooden case I build.
Just below the thick glass front.

Proper sockets for 3 end-stops have been added. The original end-stops I got where too small to fit mechanically but bigger ones where in stock this weekend. They have not been installed yet.
I'll install them together with bellows to protect the Y axis from dirt and shavings.

The probe input didn't want to work when using 5V from one of the Enable-outputs of the PLCM-B1 breakout board. I added a separate 5V supply just for the tool height probe and it works now.
Here is the answer from Purelogic regarding this issue:
  Hello Marcus,

  Thank you very much for your notice.
You are right that you need another power supply for external sensors.
PLCM-B1 has too many inputs and we could not place another on-board power supply which could power all inputs. (Of cause we could make it, but will be too expensive and large).
  Small on-board power supply with limited current (for ex. enough for 5 inputs only) can cause more problems because not all users read a manual carefully and they can easily overload this power supply. Nevertheless this way seems most right for me now.

  We will consider your notice in feature. Thank you very much.

Oleg Gladyshev,
Purelogic R&D, Russia. 

The earth cable of the spindle VFD got ripped out. I repaired it and secured it somewhat better.

The power sockets for all parts of the CNC are now permanently screwed onto the frame and can no longer fall off due to the drag of the heavy cables.

My cheap MACH3 remote is still acting up. The jog buttons get stuck and the machine just keeps moving.
I replaced the keyboard with the flaky USB port and the constant USB attach/detach cycles no longer mess up the communication of MACH3 via Ethernet to the PLCM-E3p+B1 boards.


For the smaller TravelCNC I managed to drill an XL timing belt pulley from 5mm D-shaped to 8mm round shafts. It shall replace the 3D printed one I made a while ago because that one developed some serious backlash after 6 month of usage.

I will give a small workshop on CNC machining for people who have used only 3D printers during Eaterhegg next weekend.
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