The illusive Boxford 260vmc

[irving2008]

George,
I really wonder sometimes if you say things just to wind people up. or did you miss out on potato guns in your childhood? now go calculate the force delivered in your eye from a pea-sized lump of putty due to the tangential velocity at 3000 rpm

Hmmmm.... childs putty will do nicely methinks

[GeorgeD]

Hey Rick,can you pop some putty in two holes of those holes when you get the machine up and running....if the putty flies out I will buy Irving 2 pints a day for the next 12 months.

Push it in the holes and cut off the excess both sides of the holes.

[Ricardoco]

Hey Rick,can you pop some putty in two holes of those holes when you get the machine up and running....if the putty flies out I will buy Irving 2 pints a day for the next 12 months.

Push it in the holes and cut off the excess both sides of the holes.

:heehee: Hmmmm Hey Irving, Being as i would be the one giving the results of this, what do you say 365 each!!! lol :whistling:


Hey George, thanks for the suggestions. its nice that you take the time to reply.


Rick

[Ricardoco]

Hey Irving, thanks for the pinouts, thats made life a little simpler, i notice that there is only 1 pin for spindle output pulse, on my board from cncdoctor there are two,one terminal labled "Pulse" and one "RTN"...

Also Ive been looking for a sensor for this display i found on fleabay with no luck, do you have any suggestions?

[irving2008]

Hey Irving, thanks for the pinouts, thats made life a little simpler, i notice that there is only 1 pin for spindle output pulse, on my board from cncdoctor there are two,one terminal labled "Pulse" and one "RTN"...

Also Ive been looking for a sensor for this display i found on fleabay with no luck, do you have any suggestions?

look on fleabay for "slotted opto", returns half a dozen options... just the device.. will need mounting on a small circuit board with a couple of resistors, and you'll have to rig up some sort of vane on the spindle to interrupt once per rev...

Alternatively, and more easily, if you are set on the ebay display, use a 74HC390 divider chip to give a 'divide by 50' with only 1 chip and 10 solder joints!

[Ricardoco]

look on fleabay for "slotted opto", returns half a dozen options... just the device.. will need mounting on a small circuit board with a couple of resistors, and you'll have to rig up some sort of vane on the spindle to interrupt once per rev...

Alternatively, and more easily, if you are set on the ebay display, use a 74HC390 divider chip to give a 'divide by 50' with only 1 chip and 10 solder joints!

Ok that sounds good but this is uncharted ground for me, the 74hc390 seems like the way to go and i will get a new slotted sensor just to be on the safe side as i dont know if the existing one is ok, you make the circuit sound so simple ill just trust your judgement over mine:confused:



Rick

[GeorgeD]

If you have any old disc drives? these had a slot opto in them.

[Ricardoco]

If you have any old disc drives? these had a slot opto in them.

Im going to have a look and see what ive got, im sure ive got a couple of big old mice hanging around as well, and i think they have something similar in them..

Rick

[GeorgeD]

Hah,yes forgot about the mice

The ones I'm on about are the type in your Noahs base computer ie 51/4 floppys.

Ain't you got a maplins by you?

[Ricardoco]

Progress Report

The initial inspection has been completed,
and Redundant system hardware identified and removed along with ancilliary wiring.
New control systems identified, evaluated and purchased.
New system requirements.


Electrical Systems
Computer system hardware.......................Completed
Stepper control systems...........................Completed.
Front control panel fabrication....................In progress.
Spindle Speed control...............................In progress.
Spindle Tacho..........................................In progress.
Relay controls.........................................N ot started.
Limit Switches.........................................N ot started.
Software configuration..............................Not started.

Mechanical Systems.
Ballscrew inspection..................................Comple ted.
Bearing Inspection....................................Comp leted.
Motor Refurb............................................ Completed.
Lubrication systems...................................Not started.

Other Stuff

Not yet considered ?????????

Well i dont think ive forgotten anything buts thats a little progress report.

I must say A big thankyou to everyone who has helped me with this project so far with particular thanks going to Irving, George and i2i.

Onward!!