Messages

181

General Mach Discussion / Re: stepper motor speed

« on: February 24, 2015, 11:08:37 AM »

Thanks chaps - I will report back when I am back at the machine this weekend
best regards

182

General Mach Discussion / Re: stepper motor speed

« on: February 19, 2015, 02:38:05 PM »

Thank you very much-- yes that answers my question.
 i tried to enter 1000 in the velocity "window"  on motor tuning and it will
not accept the 1000
it reverts to 686 while the graph is at its highest??

183

General Mach Discussion / Re: stepper motor speed

« on: February 19, 2015, 10:56:39 AM »

thanks Ger21

Perhaps what i mean is "if a stepper is set to run at a certain speed when unloaded
will it run at the same speed when a load is applied?" ( I realize that the motor could of course
be stalled if a high load is applied- but lets presume a low load which the particular
motor could quite easily handle - will it still run at the speed it was set at unladen?)

184

General Mach Discussion / Re: stepper motor speed

« on: February 19, 2015, 04:34:47 AM »

thank you -- do I just jack it up to say 1000 ?
can I jack it up to higher??

Do stepper motors turn at the set speed even when not loaded??
So if the speed is set at 1000 un loaded  and checked with a tach at 1000
when i put it under light load will is still try to run at 1000?
using this as a benchmark i am hoping to be able establish
the max load for this motor?
 

185

General Mach Discussion / stepper motor speed

« on: February 18, 2015, 02:31:19 PM »

Hello chaps.

I do not have any specs on the stepper motors that i am using and i dont know what
what speed they are doing when i am at a fast feed  (G0).

This is the question.
If I connect up an odometer to the shaft of the stepper what gcode can i
give it to make it go full speed.

Maybe a stupid question - but all suggestions are sincerely appreciated

regards from south africa

fred evans

186

General Mach Discussion / Re: suggestions needed for setting up tailstock stepper on lathe

« on: February 01, 2015, 12:54:56 PM »

Hello chaps --0 thanks for the input

TP - your suggestion looks quite easy. when you say setup screen do i have to do
any work on screens like adding dros etc?. I havent got that far yet.

Rich i will download the sreeen you suggest. If I instal this new screen will its configuration
change the configuration of mt current 1025.lset screen?
My concern is that i find that i have to use the old screen while learning the new screen and
i dont want to find it broken if i choose to select the old screen.

regards

fred

187

General Mach Discussion / suggestions needed for setting up tailstock stepper on lathe

« on: January 31, 2015, 01:10:10 PM »

Hello Chaps

I am using a lathe with Mach3. I use screen 1024.lset ( the entry
level screen )

I have wired up a stepper motor to drive the tailstock  screw.

The ides is to use the tailstock for drilling  and  holding  the
rolling centre when machining  long shafts.

For drilling I dont think it will be  important ( for me at this stage anyway)
to be precise with dimensions and depth . All i really need at the
moment is to be able to put some code in which will drill a starting hole
in a solid rod before boring.
Again - for holding the rolling centre on a long shaft - will manufacture a
spring loaded rolling centre which will apply spring pressure to the
rolling centre to allow for small discrepancies in the shaft lengths.
The rolling centre will have a spring controlled travel of about 5 mm which
should be enough for what i want to do 

I would appreciate advice and suggestions on doing the setup such as
which axis to use , which switches to activate , etc  and most importantly- where to
find the setup details in the operators manual

best regards and many thanks in advance

fred evans

188

General Mach Discussion / Re: code to see if homed

« on: January 27, 2015, 02:23:50 AM »

thanks ever so much-- will also  give me an oppurtunity to look at a macro

189

General Mach Discussion / Re: code to see if homed

« on: January 26, 2015, 02:32:23 PM »

when i am running a part prg i would like to try and set up a message if the machine has not
been homed

190

General Mach Discussion / Re: code to see if homed

« on: January 25, 2015, 11:08:50 PM »

Thank you Hood-- Am i correctly presuming that VB is visual basic?
I have not got as far as writing macros yet.
I will pass on this for a few more sessions until i learn about macros

best regards

fred