Topics

11

General Mach Discussion / Tangential Cutting Table and Feedrate

« on: December 27, 2007, 08:19:25 PM »

Thank you for the previous assistance with my tangential control.

I have since cut some shapes out with the table and things are looking up.

My current problem is I wish to up the feed rate to +10000 mm/min in Tangential mode.  With tangential off my machine moves very smooth with 10000 mm/min feedrates on curved objects. The moment I switch tangential on all hell breaks loose with it stop/starting jerking like in Exact stop mode. I have added the g64 to my code

I have adjusted the look ahead units to 500, adjusted accel setting in motor tuning, but with such feedrates of 5000-10000mm/min in tangent control mode my machine shakes it seft to bit's.

Any thoughts??

Jason

12

VB and the development of wizards / Digital control of the Zaxis

« on: August 05, 2007, 04:36:34 AM »

I have cross posted this in the general discussion but have come to realize it may be a VB question


My Z axis will be controlled with a pnematic actuator to toggle the Z up and down. On the Z axis will be the A axis stepper for a tangential knife.

My questions is how shall I configure Mach 3 to toggle the Z axis up and down via an output from the Grex. Under settings I can enable tangential control with a lift angle and Z lift.

With the A axis for turning the knife  is it as simple as enabling the Motor Output for the axis and let the Tangential button do the rest for turn the axis

My original post above

I have since watched the scripting tutorial and I am guessing that this is what I will do. Any thoughts on this appreciated.

When generating a tool path in Lazy cam I will setup a tool off set called cutter. My z limits will be -150 and cutter offset of +50. and set my Z raise in tangential control to raise  +50 if radius +45

I will right a M code macro something like this. I have no VB experience but this is what I'm looking to do.

M50 code
Get Z DRO
If Z is =<-50 then output 1 set to 0 ( Meaning should +45 radius be exceeded,  Z will be driven -150 + 50 offset +50 generated by tangent control = Z-50 turn off output 1)
Get Z DRO
If Z is >-50 then output 1 set to 1

Do you think this will cut it? and can I enter this M50 in the Gcode once at the start or will I have to enter it after any change in Z value with in the Gcode. I'm tipping the M50 will have to follow any z command

I am a total newby to it all and slowly feeling my way, any advice appreciate including VB coding tips

Thanks Jason

13

General Mach Discussion / Z axis design and Mach3 control

« on: August 03, 2007, 10:47:36 PM »

Hi all,

 I have searched the forums but have yet to discover the answers. I am using a Grex as the interface also.

My Z axis will be controlled with a pnematic actuator to toggle the Z up and down. On the Z axis will be the A axis for a tangential knife.

My questions is how shall I configure Mach 3 to toggle the Z axis up and down via an output from the Grex. Under settings I can enable tangential control with a lift angle and Z lift. What should be configured in the Z lift to get this output to retract the knife when the angle is reached

I have thought about using either the spindle or coolant control output??

With the A axis for turning the knife  is it as simple as enabling the Motor Output for the axis and let the Tangential button do the rest for turn the axis

Thanks for you input
Jason