The illusive Boxford 260vmc

[Ricardoco]

except it can't deal with the 50:1 reduction needed

Yes but it would seem to be easier to change from 50 holes to 1 than to design circuit, buy parts, assemble board, program board.

[irving2008]

well £24 delivered isnt bad...

blanking out 49 holes might not be as easy as you think, you might need to provide an alternate sensor. Also if you do blank the holes you'd prevent using it for closed loop speed control later...

[Ricardoco]

well £24 delivered isnt bad...

I liked the look of it, its fit for purpose and the price is not bad, although im not sure if i will end up buying another sensor, it will be interesting to see what that chip is on the back.

blanking out 49 holes might not be as easy as you think, you might need to provide an alternate sensor. Also if you do blank the holes you'd prevent using it for closed loop speed control later...

As always im thinking you are correct, maybe ill just mount another sensor on the spindle and be done with that, mind you i couldnt find anything suitable on fleabay

Rick

[Ricardoco]

This may sound stupid, but im just wiring up the drivers to the BOB and i was wondering if there were default ports used for axis, IE X=pin??? y=pin??? etc.. I do like to keep things default, as it makes things less complicated If I get problems.

[irving2008]

yes there are...

Typically (courtesy DIYCNC)

1 Charge pump signal Enable
2 X Direction X Axis
3 X Step X Axis
4 Y Direction Y Axis
5 Y Step Y Axis
6 Z Direction Z Axis
7 Z Step Z Axis
8 A Direction A Axis
9 A Step A Axis
10 Input 1 Input pin
11 Input 2 Input pin
12 Input 3 Input pin
13 Input 4 Input pin
14 Output signal Output pin
15 Input 5 Input pin
16 Spindle pulse Output pin
17 Relay 1 Output pin

18-25 Ground GND

[GeorgeD]

blanking out 49 holes might not be as easy as you think

Hmmmm.... childs putty will do nicely methinks

[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?