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General Mach Discussion / I can´t get the table coord´s and "steps per unit" to work...not even close!
« on: February 18, 2015, 04:02:03 PM »
Hi all!
First of all..thanks for all the help I already got from this forum!!
I´m new at this CNC stuff so excuse me in advance for any stupied questions and for not understanding all technical terms...
All my problems are probably some newbie mistakes...
I have just completed building my router and everything seems to work fine. I use the blue TB6550 driver board and 4 pcs Nema 23 motors (see technical spec. below)
My homing and limit switches works as they should I think. I have chosed to have my homing in the lower right corner.
Now I´m ready to start milling!!
So...here are my problems:
I can´t get the Nach3 table coord´s and "steps per unit" to work...not even close!
My cutting area is 800mm x 1200mm. When I load the roadrunner g-code the roadrunner is much larger than my whole cutting area!?
Why is that?
And when I moved my router from Y0 to Ymax the DRO showed 9.76someting...(My Ymax should be around 1200 mm)
Then I checked the "steps per unit" and when I typed in 1 mm the router took off to 120 mm and the calculator set the "step per unit" to 8.333 with DIP 1/2
With DIP 1/8 "steps per unit" ended up at 33.333 and 1/16 to 66.666
It feels very strange and I don´t where to go next!
I have read heavy amounts of text here and in different forums but I can´t find any answere...what am I missing!?!?
So I´m asking you guys instead and hope that you can help me out!
Cheers!!
//Martin
Here are the technical spec. for the stepper motors:
Part No.: 57BYGH633
Frame Size: NEMA23
Step Angle: 1.8 degree
Voltage: 3.0V
Current: 3.0 A/phase
Resistance: 1.0Ohm/phase
Inductance: 1.6mH/phase
Holding torque: 13.5Kg-cm 270oz-in (For Bipolar connecting, the holding torque is 270oz-in)
Rotor inertia: 480 g-cm2
Detent torque: 0.68 kg-cm
Number of wire leads: 6
Weight: 1.20lb (1.0 kg)
Length: 78mm
http://www.ebay.co.uk/itm/Super-Quality-Nema-23-Wantai-Stepper-Motor-270oz-in-3A-4-Axis-Board-CNC-Kit-/171407884797?pt=UK_BOI_Industrial_Automation_Control_ET&hash=item27e8b4c1fd
First of all..thanks for all the help I already got from this forum!!
I´m new at this CNC stuff so excuse me in advance for any stupied questions and for not understanding all technical terms...
All my problems are probably some newbie mistakes...
I have just completed building my router and everything seems to work fine. I use the blue TB6550 driver board and 4 pcs Nema 23 motors (see technical spec. below)
My homing and limit switches works as they should I think. I have chosed to have my homing in the lower right corner.
Now I´m ready to start milling!!
So...here are my problems:
I can´t get the Nach3 table coord´s and "steps per unit" to work...not even close!
My cutting area is 800mm x 1200mm. When I load the roadrunner g-code the roadrunner is much larger than my whole cutting area!?
Why is that?
And when I moved my router from Y0 to Ymax the DRO showed 9.76someting...(My Ymax should be around 1200 mm)
Then I checked the "steps per unit" and when I typed in 1 mm the router took off to 120 mm and the calculator set the "step per unit" to 8.333 with DIP 1/2
With DIP 1/8 "steps per unit" ended up at 33.333 and 1/16 to 66.666
It feels very strange and I don´t where to go next!
I have read heavy amounts of text here and in different forums but I can´t find any answere...what am I missing!?!?
So I´m asking you guys instead and hope that you can help me out!
Cheers!!
//Martin
Here are the technical spec. for the stepper motors:
Part No.: 57BYGH633
Frame Size: NEMA23
Step Angle: 1.8 degree
Voltage: 3.0V
Current: 3.0 A/phase
Resistance: 1.0Ohm/phase
Inductance: 1.6mH/phase
Holding torque: 13.5Kg-cm 270oz-in (For Bipolar connecting, the holding torque is 270oz-in)
Rotor inertia: 480 g-cm2
Detent torque: 0.68 kg-cm
Number of wire leads: 6
Weight: 1.20lb (1.0 kg)
Length: 78mm
http://www.ebay.co.uk/itm/Super-Quality-Nema-23-Wantai-Stepper-Motor-270oz-in-3A-4-Axis-Board-CNC-Kit-/171407884797?pt=UK_BOI_Industrial_Automation_Control_ET&hash=item27e8b4c1fd