Messages

181

General Mach Discussion / Re: Quantifying A-axis rotary

« on: December 16, 2005, 06:41:49 PM »

Ah-ha! Thanks so much.Think that's going to do it.Voila!

182

General Mach Discussion / Re: Quantifying A-axis rotary

« on: December 16, 2005, 04:55:44 PM »

That is hard to comprehend unless what you're saying is : if I place the number of steps per unit in the a-axis window which represent one full rotation of the rotary table,Mach2 offsets that for it to be represented in degrees. If this is true then am I placing the 400 steps per unit of the stepper motor(one full stepper revolution) or the 400*72(28,800,one full rotation of the table)) for the number of stepper motor pulses times the worm gear ration,into the motor tuning,steps per unit window?-Keith

183

General Mach Discussion / Re: Quantifying A-axis rotary

« on: December 16, 2005, 03:20:35 PM »

One more thought about all this not clear; how to set up the units in the motor tuning section of mach2:my rotary table's motor is 400 steps per and the worm gear requires 72 turns to complete a revolution that makes 28,800 steps to make the table turn 360 degrees.Since I am using inches as a unit in mach2,do I use the diameter of the rotary table(4") to calculate the steps per unit,in the motor tuning of mach2 for the a-axis?-Thanks for all your help,Keith

184

General Mach Discussion / Re: Quantifying A-axis rotary

« on: December 16, 2005, 09:27:05 AM »

Awesome Graham ! I woke up thinking "of course it is resolved in degrees..." I mean the increments on the 'table' are in degress ! but still had the equations and 'steps per whatever'  in my brain's limbo.
That's the whole kit and kaboodle you laid out for me. My first xmas present. Very appreciated ! 'Cut','Pasted' and 'Saved as...'-Keith
PS-Since starting my CNC knowledge 6 months ago (I'm actually an electronics person)and when it comes to learning all this,I rarely say "what?" anymore ; my "whats?" have become reserved for the supplier of my system's bold and erroneous suggestions at solutions,that I later ,empirically prove wrong.

185

General Mach Discussion / Quantifying A-axis rotary

« on: December 15, 2005, 06:18:26 PM »

Hi,I'm just getting my feet wet with my 4th axis,rotary table.I did a 'g1' a(value).I just put in 360 as the value not thinking anything about degrees,just as a starting point.Did the move.My question is, 'in finding a value for where you want to wind up',is this value strictly an 'inch per minute' number? ...and if I calculate the proper ratio for the worm gear to 'pulses per',will this put me where I want on some point ,on some circumference?
Thanks,Keith