Manual Pulse Generator

[widgitmaster]

The construction of my new Super-V router is nearly finished, and I have started working on the electronics. So far I have everything required, including a new Manual Pulse Generator. Here is a list of the main components I'll be using:

65VDC 6A power supply.
Four Gecko G202 stepper drivers.
Bob Campbell's Breakout Board Plus.
Manual Pulse Generator, model ESM80.2.100.12.R.R

Now I have wired one other router in the past, so I feel confident that I can hook this one up without too much difficulty. The problem I'm having is the lack of information as to the correct application of the Manual Pulse Generator to the breakout board.

I have contacted Bob Campbell, and he said the Manual Pulse Generator is compatible. He also said he would look for a document which explains how to add it to the breakout board. Unfortunately he has not responded. Now I'm in need of this information, so I can design the console which will have all the controls and switches for the router.

If anyone has any information as to the proper procedure and wiring, it will be greatly appreciated!

Widgit

[jalessi]

This document gives basic wiring not directly applicable to the Campbell product however it may help you.

[One of Many]

I've been kind of pondering how this was done in Mach, me-self; on the CNC4PC board.

The pendant I have is a Euchner with MPG, Estop and a few optional function buttons. The back burner was imagining what inputs would be required with a second port to utilize.


Thanks much for the thread and good info to match it.

DC

[widgitmaster]

Thanks for the replies!

Now I just realized I've been looking at the older .PDF file rev 1.7 of my breakout board, as I have a rev 1.8 board.

The rev 1.8 file indicates that the 6-pin jumper J23 is for Encoder, and the silkscreen on the board says MPG.

J23
Pin1 Isolated GND
Pin2 Isolated gnd
Pin3 Isolated to pin 12 of parallel port (in1)
Pin4 Isolated to pin 13 of parallel port (in2)
Pin5 Isolated to pin 15 of parallel port (switch)
Pin6 Isolated +5v

One the back of the MPG, there are four screw terminals:

1 5v/12v
2 0v
3 A
4 B

If I read the .PDF from MyLittleMachineShop.com correctly, all I need to do is connect the following pins:

Pin6 -> 5c/12v
Pin1 -> 0v
Pin3 -> A
Pin4 -> B

However it is unclear that 0v = GNG so I still need someone like Marris to validate my conclusion!

After this is wired in, it looks like my MACH3 software is the only way to use it, and to designate which axis to jog. This is a little confusing as well, as I have seen many a CNC console with an Axis selector switch or dial to choose which axis to move!

Thanks again,
Widgit

[One of Many]

Can't tell you what GNG is, but I am confident GND should be 0v.

An MPG is an encoder with detents for operator feedback, used manually to produce a pulse stream. Pins with 0 and 5v power up the devices and outputs are A&B from the MPG.


You hit on why I posted that MPG picture. It has a 6 position axis selector which codes through 3 pin outputs used in a binary format. If you needed 6 selections you would need 3 bits to represent that to 3 inputs to a control. Since most of us are going with 4 axis max, this could be represented via 2 bits or pin inputs for 4 binary state changes. I was hoping to use the optional function buttons as X1, X10, X100 or Jog high and low speed.

I doubt there is enough inputs to take full advantage of all these functions individually. My thoughts were, in an effort to reduce the amount of pins required for extra conveniences.

Like in a 2 button jog function that re-uses the MPG inputs. One button could disconnect the MPG output signals and another set of buttons could send out a pulse stream on those A&B lines to function as a jog with variable frequency.

DC

[jalessi]

Wigitmaster,

A rotary switch or several momentary switches will control the selected axis.

A Second Parallel Port Will Be Required To Address All The Triggers.

The OEM Triggers need to be toggled.

OEM Trig #1
Select Axis X

OEM Trig #2
Select Axis Y

OEM Trig #3
Select Axis Z

OEM Trig #4
Select Axis 4


The ones below are for speed selection

OEM Trig #5
X1


OEM Trig #6
X10


OEM Trig #7
X100


You are correct zero (0) is ground.

Jeff...

[widgitmaster]

Can't tell you what GNG is, but I am confident GND should be 0v.

An MPG is an encoder with detents for operator feedback, used manually to produce a pulse stream. Pins with 0 and 5v power up the devices and outputs are A&B from the MPG.

DC

Oops!
Actually GNG was a (fat finger) typo, something my arthritic hands do alot!

[widgitmaster]

Wigitmaster,

A rotary switch or several momentary switches will control the selected axis.

A Second Parallel Port Will Be Required To Address All The Triggers.

You are correct zero (0) is ground.

Jeff...

Before I add a rotary switch to my list, is this selection process actually done in MACH3 ? There are several screen shots that indicate settings for an MPG in MACH3



Widgit

[jalessi]

Wigitmaster,

MPG Speed and Axis Selection can always be controlled from within Mach.

The addition of physical switches will give you external (remote control) options as well.

Jeff...

[One of Many]

Jeff,

So, I take it that the Pendant function takes up 7 pins for selections and 2 for pulses?

DC

[jalessi]

DC,


Seven pins to select each trigger,

+5 volts to trigger them high

Two pulse connections

One ground connection

Some BOB's get pulled down so then trigger would go low or ground instead.

Jeff...

[One of Many]

I am surpized the software doesn't take advantage of binary mode selection format to reduce the number of pins required. Leaving some for "other functions". 2 for pulses, 2 for axis, and 2 for speed.... sounds better than 9 dedicated.

DC