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Offline Tweakie.CNC

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Re: Newbie with TB6560 1st time testing problems
« Reply #40 on: April 01, 2013, 11:49:33 AM »
Hi Gary,

It depends on your leadscrew pitch and if you use Imperial or Metric as it is perhaps better to arrive at a nice round number but I would recommend that you set your driver board to 1/8 microstepping (dip switches 5 & 6 OFF) then Al's calculator should help you to arrive at the correct steps per unit. http://www.machsupport.com/forum/index.php/topic,16315.0.html

Tweakie.

Addition;  More info here http://www.machsupport.com/forum/index.php/topic,12512.0.html
« Last Edit: April 01, 2013, 11:57:54 AM by Tweakie.CNC »
PEACE
Re: Newbie with TB6560 1st time testing problems
« Reply #41 on: April 01, 2013, 11:57:45 AM »
Hi Tweakie
I will do so as suggested and use Al's calculator.
Would you please advise regarding slaving A axis to X axis. The M3 manual does not give any other details but to slave the axis in config>slaving. I have "slaved " the 2 axis together but they still run separately. In other words when I jog the X axis only the 1 motor turns. If I jog the 4th axis it runs on its own. Are there any further setting to do?
Regards
Gary
Re: Newbie with TB6560 1st time testing problems
« Reply #42 on: April 01, 2013, 12:06:36 PM »
Hi Tweakie
I forgot to mention that my machine linear movements are a mixture. The 2 sides of the X axis and the Y axis run on module 1.5 racks, the pinions are 20 tooth mounted on a 60 tooth belt driven gear, the motor has a 20 tooth belt gear pulley. The Z axis is a direct drive form the motor to 1/2" - 10, 5 start acme screw running through a "Dumpster" nut.
Regards
Gary

Offline Tweakie.CNC

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Re: Newbie with TB6560 1st time testing problems
« Reply #43 on: April 01, 2013, 12:44:14 PM »
Hi Gary,

I don't use slaved axes so I am not the best person to ask about this one.  :'(

I calculate your steps per at 160 assuming I got everything right.

Tweakie.
« Last Edit: April 01, 2013, 12:46:00 PM by Tweakie.CNC »
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Re: Newbie with TB6560 1st time testing problems
« Reply #44 on: April 01, 2013, 01:00:23 PM »
Hi Tweakie
When trying to work out micro stepping, my board specs have setting for: 1. 1/2, 1/8, 1/16. What/ how does this relate to M3 settings. I have spent the day trying to reseach this and still no answer. Alez's calculator wont allow me to enter a figure as 1/8!!!!!
How does one get this magical number? Do I enter for example: 0.125! This does not make sence to me as one enters 10 for a gecko.  
The M3 manual states
"5.5.1.3 Calculating Mach3 steps per motor revolution
We very strongly recommend that you use micro-stepping drive electronics for stepper
motors. If you do not do this and use a full- or half-step drive then you will need much
larger motors and will suffer from resonances that limit performance at some speeds.
Some micro-stepping drives have a fixed number of micro-steps (typically 10) while others
can be configured. In this case you will find 10 to be a good compromise value to choose.
This means that Mach3 will need to send 2000 pulses per revolution for a stepper axis
drive."
Re: Newbie with TB6560 1st time testing problems
« Reply #45 on: April 01, 2013, 01:05:25 PM »
Hi Tweakie
Sorry for the protracted reply and thanks for the magical in sight. In other word you just used the 8 of 1/8 please confirm if my assumtion is correct.
I am feeling fustrated/ anxious/ burnt out as I have spent the last 12hrs solid on the net trying to research and find answers.
Regards
Gary
Re: Newbie with TB6560 1st time testing problems
« Reply #46 on: April 01, 2013, 01:27:31 PM »
Hi Tweakie
How did you derive a figure of 30mm for the lead screw pitch.
Surely for a module 1.5 rack (1.5mm between teeth would) =4.71[3.1452 x 1.5]
Using 4.71 the calc comes out as 1019.10828 with a resolution of 0.000981mm/step
Gary
Re: Newbie with TB6560 1st time testing problems
« Reply #47 on: April 01, 2013, 01:32:16 PM »
Hi Gary, time to throw in my four peneth in. Why cant you use the axis setting option on the setting page of Mach. Its in the bottom left hand corner of the page and providing you can measure the distance your axis have moved it will set the steps for you. I did this and it gave me my setting which I rounded up. I think mine gave me 799.9 so I set it to 800. Jim
Re: Newbie with TB6560 1st time testing problems
« Reply #48 on: April 01, 2013, 01:37:51 PM »
Hi Jim
Before running the axis, I need to sort out the slaving issue still.
Gary
Re: Newbie with TB6560 1st time testing problems
« Reply #49 on: April 01, 2013, 01:38:53 PM »
I cannot find any references to slaving. doing a search brings me back to my own posts