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11
General Mach Discussion / Re: Adding DRO to MachTurn
« on: April 25, 2010, 07:23:57 AM »
Right , had a time to play this morning and done everything you suggested . It works fine in manual mode using page up and page down . The only thing I have a problem with is the toolchange through MDI . When you type in t0202 m06 the turret runs the wrong way i.e. it runs up against the pawl first . I do not know how to change this in Mach3 .  Apart from that it looks like jobsa goodun . :)

12
General Mach Discussion / Re: Adding DRO to MachTurn
« on: April 24, 2010, 04:38:31 AM »
Cheers Hood . I will have a stab at that tomorrow hopefully . Family things today unfortunately but at least I should be able to have a good stab at it tomorrow thanks to your kind help . You are a star sir . Thank you .

13
General Mach Discussion / Re: Adding DRO to MachTurn
« on: April 24, 2010, 03:11:53 AM »
Here is the wording in the link .


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Re: ATC for lathe
« Reply #22 on: September 11, 2007, 04:20:24 PM »
   Reply with quote
My Boxford TCL 125 has a ratchet type, stepper driven, 8 position turret. I used a simple G code subroutine to get it to index. Y axis was left as linear, (Mach doesn't care) and worked out the number of steps to get the 45 degrees. So the subroutine indexes the turret, say 50 degrees, then reverses the turret to stall the stepper against the ratchet (no problems the driver limits the current)
G code call is:-
M98 Ln P123 (Where n is the number of times I want to index and P123 is the subroutine.
Subroutine is:-
O123
G91 (Incremental distance mode)
G00 y-10 (Index more than 45 degrees)
G00 y2 (Back up to stall on ratchet)
G90 (Back to absolute distance mode)

M99 (Return from subroutine)

The Boxford turret has no means of telling Mach which tool it is using and because of the ratchet, it is strictly sequential.

I have not worked out the steps per degree yet and yes I believe it is geared . It is stepper driven with a microstepper . Yes the stepper remains energised although only on half power(switchable to full power if need be) . Again , if I can drive it manually through the keyboard it would be easier to figure out . The cursor keys are used for the x and z axis , but I'm still stumped as to what to use for the y axis .

Many thanks

14
General Mach Discussion / Re: Adding DRO to MachTurn
« on: April 24, 2010, 02:38:32 AM »
Good morning Hood ,

no the turret does not have a homing switch , but if I can jog it to position 1 then I reference it then .

15
General Mach Discussion / Re: Adding DRO to MachTurn
« on: April 23, 2010, 05:23:39 PM »
Hi Hood ,

thanks for the rapid reply once again . Do the screen designers show you how to configure the keyboard ? The only reason to use the keyboard for the turret is just for setting up etc . Using the turret under program , I was going to write a small sub program and and every time I need to change tool I would call up the sub program . If you look at this thread you will get the idea . The only difference I would wish to do is change the linear programming to angular .

http://www.machsupport.com/forum/index.php/topic,4162.20.html

The turret has 8 positions and rotates in only one direction to advance to the next tool position . It then backs up on itself so that it locks up against a pawl .

I would dearly love to be able to use the turret using a macro so that the tool N° is always known . That way the programming will be easier because you wont have to remember where the last tool was . You could just say you want tool 3 for instance and it go straight to it . Unfortunately my knowledge of writing VB scripts is non-existent . I would need one written for me and then told how to place it in to Mach3 and use it .

Hope this helps .

16
General Mach Discussion / Adding DRO to MachTurn
« on: April 23, 2010, 02:48:18 PM »
I am just finishing off retrofitting my Boxford TCL125 . The turret I had originally taken off is now back on the machine . When I start up Mach3 , all the screens show only two axis as you would expect . I intend to drive the turret using the "Y" or even the "A" axis but alas there is no DRO , no homing button , and also I do not know how to drive it from the keyboard . I have turned the turret using MDI without a problem . I am also toying with the idea of using degrees instead of the normal linear coordinate system .

Can anyone advise on how to add a DRO and homing buttons etc and also tell me how to configure Mach3 so that I can drive the turret with the keyboard and maybe swap the linear units to angular . Please bear in mind that the explanation needs to be as simple to follow as possible please .

Many thanks for looking .

17
General Mach Discussion / Re: Prgramming & feed rates
« on: January 17, 2010, 05:35:56 AM »
Cheers once again Hood and thanks Phil .

I was not expecting those answers . I will carry on with caution later on today and will post back . I think it is much better to start from an informed decision and then move forward . That way you tend to get less bang and more buck , so to speak .


18
General Mach Discussion / Prgramming & feed rates
« on: January 16, 2010, 11:06:51 AM »
Hello once again everybody

I have a Boxford TCL125 and it was running fine with Mach3 . However the computer committed suicide and had to be replaced . Thankfully I kept a record of ports and pins etc just in case of such an event . I have just put everything back as it was and I have 2 problems . The first is that my MPG no longer works , but that will not stop me using the machine so I will ignore it . The other problem is that I no longer have the ability to read the spindle speed for a reason I do not know . I can start and stop it , and I have now set it up so that the speed is not needed , i.e. s1000m03 in mdi starts the spindle and I can adjust the speed using the spindle % buttons .

Now to the question . As all my programs have been written in feed/rev , if I start the spindle in the program at say 1000rpm and it does 1250rpm I do not care . But will Mach3 allow the feed per rev or will it force me to use feed/mm ? For instance if it "thinks" the spindle is doing 1000rpm and the feed command is 0.1mm/rev will it feed at 100mm/min irrespective of whether or not it might be doing 1500rpm , or will it just complain it has no spindle speed visible ? Also if I use G94 instead of G95 , can I use G00 command and expect it to traverse at the full speed the machine is set to , or will I have to put in a feed command in every time I want to change from a rapid to a feed move and vice versa ?

The machine is going to be retrofitted once more in a few weeks so evey thing will be sorted then , but for now I have a couple of jobs to do urgently and any answers will be gratefully received .

I think I know what the answers are going to be , but if you don't ask , you won't know for sure . Thanks for looking .

19
General Mach Discussion / Re: Boxford tcl125
« on: November 13, 2009, 11:30:29 AM »
Thanks for that , but unfortunately I have tried to get them to ring me over the last couple of days because they have no number listed. They are obviously to busy to respond so I was hoping there might be another way.

Thanks again.

20
General Mach Discussion / Boxford tcl125
« on: November 13, 2009, 09:36:48 AM »
Can anyone tell me what they have used succesfully to control the spindle of a boxford tcl125,both driving it and deriving spindle speed etc for threading.

And can anyone tell how the turret operates on the boxford and explain how to drive it through that glorious application known as Mach3.

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