The illusive Boxford 260vmc

[Ricardoco]

OK ive got an hour or so before i have to go to work so i decided to have a look at this tach setup, the 22 sensor i have used is obviously working as i get numbers on the display but they are all over the place, so i decided to investigate the existing sensor that is on the spindle, this is an rs 306-061, there are two types of this sensor, mine is the slotted type, my uestion is can i use this with the divider circuit i got from irving...(posted earlier in this thread??) or indeed if irving is around what does he think..

Rick

[Ricardoco]

This is the divider Circuit to save searching.


And here is the link to the RS sensor

midas.herts.ac.uk/Datasheets/opto/optoswitch.pdf

Rick

[i2i]

why don't you just make a disc with one slot, and swap it for the existing one.

[Ricardoco]

Im fast leaning in that direction, i may just wait and buy the tachulator, its off the shelf, programmable, it comes with the sensor, and it has good reviews, I did'nt want to go down the build your own route as ive done all this PCB DIY before it drives me nuts but at least i had a go. the thing is i dont enough hours in the day as it is. Having built the circuit got the display and the sensor now comes all the tinering about, it really would have been quicker and less hastle to just buy one lol. but i really do believe in buying within the UK if possible..

[Ricardoco]

On a side note i2i i think you may have converted one of these machines before, Do you know where i start to calibrate (if that is the term) the machine with mach EG so 10mm in mach is 10mm on the axis..

[i2i]

It may be different for you as you've got different stepper drivers in your machine. But the jist of it is, set it to mm, set the step and direction pins for each axis and enable the axis, got to motor tuning and set the steps to 200, the velocity to 1500, and the acceleration to 50, for x y and z, making sure you save tha axis settings each time. You'll need to set the step pulse length to 5ms, and you'll only need to do that once.

[Ricardoco]

It may be different for you as you've got different stepper drivers in your machine. But the jist of it is, set it to mm, set the step and direction pins for each axis and enable the axis, got to motor tuning and set the steps to 200, the velocity to 1500, and the acceleration to 50, for x y and z, making sure you save tha axis settings each time. You'll need to set the step pulse length to 5ms, and you'll only need to do that once.

I did all that at the begining, Sorry I made a hash of that question... What i was trying to say is, what do i need to do to make the amount of travel in say the x axis 10mm on the bed and 10mm in mach, so if i tell mach to move the x axis 10mm it moves 10mm as opposed to say 12mm for example? .... there, clear as mud lol

[i2i]

ok what are the steps set at in motor tuning, and what exactly do you get if you move it 10mm by mach

[Ricardoco]

ok what are the steps set at in motor tuning, and what exactly do you get if you move it 10mm by mach

LOL im not getting this am i lol Ok I thought i had to set the screw spec so mach knew how far 1 rev of the stepper would cause the bed to travel, I wanted to know how i find this information to put into mach lol, sorry im between shifts at the moment so ive had a night shift and no sleep till tonight so I can reset my body clock while im off work.


Rick

[i2i]

go to the settings page, and it's in the lower left corner

"set steps per unit