Centroid Community CNC Support Forum

Part 6, Basic bench test of a Leadshine Closed Loop stepper drive and motor.

Part 7, Cabinet is wired and complete. Overview of the work and using CNC4PC.com's C86Acorn and C34 boards.

Hi Marty,
Another great video, thanks!
A couple of questions:
I too use an E-Stop contactor, but I have run my Line through the contact, not Neutral/Common. I'm wondering what the difference is.
I keep hearing about using "snubbers" but have never seen such a device advertised (at least by that name). They are to prevent arcing and fusing of the coil contacts in this case. Is that right?
And if you've covered these topics elsewhere, just point me in that direction.
Thanks again,
Gary

GBCues wrote: ↑Thu Nov 12, 2020 12:31 pm Hi Marty,
Another great video, thanks!
A couple of questions:
I too use an E-Stop contactor, but I have run my Line through the contact, not Neutral/Common. I'm wondering what the difference is.
I keep hearing about using "snubbers" but have never seen such a device advertised (at least by that name). They are to prevent arcing and fusing of the coil contacts in this case. Is that right?
And if you've covered these topics elsewhere, just point me in that direction.
Thanks again,
Gary

Gary
Search Quencharc on Centroid's page (its toward the bottom)
https://www.centroidcnc.com/centroid_di ... nents.html
There is a description and tech bulletin of their use.


Running the axis motor load across two contacts spreads the load across two contacts instead of one.
Also, when it comes to DC, the contactors are rated differently. 24VDC is hardly worth worrying about but 48VDC and up to 180VDC you must use correctly rated contactors.

Hope this helps a little bit...

Helpful as always
Thanks!
Gary

This was an impromptu video. Kind of an overview of setting up the X and Z axis overall turns ratio and lash comp on the small Emco PC5 lathe

Marty

Emco PC5 Centroid CNC Acorn Conversion: Part 8 Setting Z & X Overall Turns Ratio and Lash Comp

Part 8: Going over the Wizard settings for the PC5 and a brief overview of other features.
This is an unedited video. Be nice

I try to go over the Wizard settings for the Emco PC5, using the CNC4PC C86Acorn board and Leadshine CS-D508 closed loop steppers, a 1000 line encoder, and a VFD. I touch on some of the other Wizard settings.

Using these settings would give those setting up a PC5 a starting point. Keep in mind your overall turns ratio may change depending on the pulley tooth count you use on the motor to ball screw (overall turns ratio)

I have also attached my report created after doing this video. Conceivably, you could RESTORE it to your machine if you are doing the exact same build, and only have to import your license, and tweak your Overall Turns Ratio and Lash settings, possibly soft limit travels slightly.