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Messages - Monty

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61
Show"N"Tell ( Your Machines) / Re: My new project
« on: January 03, 2009, 11:01:08 PM »
Alas the dremel is faster than the internet. I have irreversibly altered the disk. It's OK. I can always make another one with my mill if need be.

Mach 3 is installed on the machine and it is talking to the breakout board. I have calibrated the spindle speed output and configured the spindle run and direction relays. The index input is working using the existing EMCO sensor. I just supplied it with 5V, ground and used the index pulse. The timing pulse and sensor is unused. I Just have to hook up the E-stop circuit and deal with a few little wiring snafus that arise when converting from EU to US power.

Thanks for the feedback.  :)

Monty

62
Show"N"Tell ( Your Machines) / Re: My new project
« on: December 21, 2008, 01:38:32 PM »
Moran taing Hood.

I ran the math on the slot width per the user guide and I got .0631" for the slot width, about twice the width of the current slot. I am using the parallel port. Do you think If I were to widen the slot to around .12" the pulse will be long enough?

I am going to try to get the existing sensor to work. If I can't I'll try the OPB 917B. It can't hurt and I have it here in my hot little hands.

Monty

63
Show"N"Tell ( Your Machines) / Re: My new project
« on: December 19, 2008, 09:01:46 PM »
After taking the board off the encoder, it appears to use a couple of photo detectors of some sort. Both pulse streams use exactly the same detector, one is just spaced up a bit to read the elongated one per rev slot.
If it is just five volts no problem, but do I need the finer resolution or will the one per rev pulse be enough?


Monty

64
Show"N"Tell ( Your Machines) / Re: My new project
« on: December 19, 2008, 08:42:14 PM »
Brett,

There are four wires. two to each of the sensors. I imagine one is power and the other is signal. I am using the combo board from Bob Campbell. There are two sensors, one for the index pulse (one per rev) and the other (lots per rev) They are separate. If it is 5V I can just use the 1/rev signal. I was just hoping there was a way to use the finer resolution as well.  I don't have a pin out or any documentation other than what I posted. The documentation with my lathe shows an entirely different setup. :(

Monty

65
Show"N"Tell ( Your Machines) / Re: My new project
« on: December 19, 2008, 04:37:05 PM »
Some additional info

The disk is brass. It has 1 long index slot, and numerous shorter timing slots. There are two sensors, one taller one for the index slot, and a shorter one for the timing slots. There are two wires to each sensor, some resistors, a POT and a capacitor on the board.

Part number on the sensor HGA2003 B525 (made in mexico) (googling this doesn't find anything)

The board is an EMCO part and they are less than helpful.

Thanks,

Monty

66
Show"N"Tell ( Your Machines) / Re: My new project
« on: December 19, 2008, 04:31:20 PM »
Does anybody out there in cyberland know anything about this EMCO part? I am trying to hook up the spindle encoder and I don't have any documentation on it.

67
Show"N"Tell ( Your Machines) / Re: Monty's Problematic Contraption
« on: May 22, 2008, 11:38:58 AM »
I have had good luck with the combo board from Campbell designs:

http://campbelldesigns.net/

It is based on the printer port. If you want to go usb, you might check out the smooth stepper board, although I have no personal experience with it.

Monty

68
Show"N"Tell ( Your Machines) / Re: Starting on the Hurco
« on: February 22, 2008, 10:16:08 PM »
Bummer about the solenoids. I've had some luck buying them surplus. You might try surplus center.

http://www.surpluscenter.com/sort.asp?UID=2008022221110548&catname=air&keyword=AVOC

Still not inexpensive, but hopefully a little less than what you have been looking at. If not there is always fleabay.

Maybe I'll have my lathe running by the time you need those pull studs.  ;)

Monty

69
Show"N"Tell ( Your Machines) / Re: Starting on the Hurco
« on: February 22, 2008, 09:16:48 PM »
Hey Brett,

Looks like you've got your work cut out for you. What type of tool holder does the machine currently use?

At least the thing is Y2K compiant ::).

I remember having to put those stickers on all kinds of crap when I worked for Lockheed. As if a machine tool needs to know when or where it is.....half the time I don't even know :D.

Monty

70
Show"N"Tell ( Your Machines) / Re: Worlds oldest CNC lathe?
« on: February 13, 2008, 11:43:12 PM »
Exceeeeeleeenttttt!

I can feel those guys concentrating.  :D

Looks like a shop tour would be quite an experience.

Monty

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