Formula to calculate the right SCALE
10 Jul 2017 22:23 #95625
by Banda68
Formula to calculate the right SCALE was created by Banda68
Hello to Everybody!
Please apologize me for a very simple question but I ask to You if somebody can help me.
I have build the 4 axis on my machine (Axis A)
So it can rotate at 360 degree
I have a pulley system so from the motor to the A Axis the Reduction ratio is 1 to 12
(On the motor 18 teeth, than 3 pulley of 72 teeth to have 1:12 reduction ratio)
I would like have a high torque for this axis.
I have a 1.8 degree degree stepper motor and the stepper card is configurated at Sixteen step
(Number of steps per 1 Shaft revolution is 3200)
Please can You write to me the formula to calculate the right SCALE parameter in . INI configuration file considering the Reduction ratio is 1 to 12 ?
Many Thanks for Your great Help!!
Kind Regards
Luciano!!
Please apologize me for a very simple question but I ask to You if somebody can help me.
I have build the 4 axis on my machine (Axis A)
So it can rotate at 360 degree
I have a pulley system so from the motor to the A Axis the Reduction ratio is 1 to 12
(On the motor 18 teeth, than 3 pulley of 72 teeth to have 1:12 reduction ratio)
I would like have a high torque for this axis.
I have a 1.8 degree degree stepper motor and the stepper card is configurated at Sixteen step
(Number of steps per 1 Shaft revolution is 3200)
Please can You write to me the formula to calculate the right SCALE parameter in . INI configuration file considering the Reduction ratio is 1 to 12 ?
Many Thanks for Your great Help!!
Kind Regards
Luciano!!
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10 Jul 2017 23:22 #95630
by rodw
Replied by rodw on topic Formula to calculate the right SCALE
You need to know how far it moves in 1 revolution. Is it ball screw, rack and pinion or something else? What are the specifications for your drive that let you calculate the distance moved in 1 revolution?
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- Todd Zuercher
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11 Jul 2017 02:40 #95636
by Todd Zuercher
I believe for configuring your rotary axis you need to specify the axis scale in steps/degree (or what ever angular units you are configuring the machine to use.)
So for the numbers you gave one revolution of the step motor will give 1/12 of a rev of your rotary, or 3200 steps = 30 degrees. Which is 106.667 steps/degree and that is what your step scale shoudl be. (provided the numbers you gave were correct.)
Replied by Todd Zuercher on topic Formula to calculate the right SCALE
Hello to Everybody!
Please apologize me for a very simple question but I ask to You if somebody can help me.
I have build the 4 axis on my machine (Axis A)
So it can rotate at 360 degree
I have a pulley system so from the motor to the A Axis the Reduction ratio is 1 to 12
(On the motor 18 teeth, than 3 pulley of 72 teeth to have 1:12 reduction ratio)
I would like have a high torque for this axis.
I have a 1.8 degree degree stepper motor and the stepper card is configurated at Sixteen step
(Number of steps per 1 Shaft revolution is 3200)
Please can You write to me the formula to calculate the right SCALE parameter in . INI configuration file considering the Reduction ratio is 1 to 12 ?
Many Thanks for Your great Help!!
Kind Regards
Luciano!!
I believe for configuring your rotary axis you need to specify the axis scale in steps/degree (or what ever angular units you are configuring the machine to use.)
So for the numbers you gave one revolution of the step motor will give 1/12 of a rev of your rotary, or 3200 steps = 30 degrees. Which is 106.667 steps/degree and that is what your step scale shoudl be. (provided the numbers you gave were correct.)
The following user(s) said Thank You: Banda68
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11 Jul 2017 07:59 #95646
by Banda68
Replied by Banda68 on topic Formula to calculate the right SCALE
Dear Away I have just the pulley system to Reduction ratio is 1 to 12 without any ball screw.
I have an Angular postponement to Reduction ratio is 1 to 12 without any ball screw.
I have a 1.8 degree degree stepper motor and the stepper card is configurated at Sixteen step
(Number of steps per 1 Shaft revolution is 3200)
I hope I give to You all information.
Many Thanks
Luciano
I have an Angular postponement to Reduction ratio is 1 to 12 without any ball screw.
I have a 1.8 degree degree stepper motor and the stepper card is configurated at Sixteen step
(Number of steps per 1 Shaft revolution is 3200)
I hope I give to You all information.
Many Thanks
Luciano
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11 Jul 2017 10:01 #95648
by Banda68
Replied by Banda68 on topic Formula to calculate the right SCALE
Dear Rodw I have just the pulley system to Reduction ratio is 1 to 12 without any ball screw.
I have an Angular postponement to Reduction ratio is 1 to 12 without any ball screw. Just belts
Pratically the shaft of the motor made 1 revolution and the A Axis made 1/12 step
I have a 1.8 degree degree stepper motor and the stepper card is configurated at Sixteen step
(Number of steps per 1 Shaft revolution is 3200)
please can You write to me the formula for calcolate the right SCALE parameter?
Than I will change the value in my .ini file
Please can You confirm to me I have to change this setting just in .ini file?
Or i must modify some other file/files?
Many Thanks for your great Help!!
I hope I give to You all information.
Many Thanks
Luciano
I have an Angular postponement to Reduction ratio is 1 to 12 without any ball screw. Just belts
Pratically the shaft of the motor made 1 revolution and the A Axis made 1/12 step
I have a 1.8 degree degree stepper motor and the stepper card is configurated at Sixteen step
(Number of steps per 1 Shaft revolution is 3200)
please can You write to me the formula for calcolate the right SCALE parameter?
Than I will change the value in my .ini file
Please can You confirm to me I have to change this setting just in .ini file?
Or i must modify some other file/files?
Many Thanks for your great Help!!
I hope I give to You all information.
Many Thanks
Luciano
Please Log in or Create an account to join the conversation.
11 Jul 2017 10:08 #95651
by Banda68
Replied by Banda68 on topic Formula to calculate the right SCALE
Dear Todd
Many Thanks for your quick answer!
Please can You write to me the formula to calculate 106.667 Steps/degree?
Please can You confirm this code is ok?
This is the code of my A Axis in .ini file:
[AXIS_3]
TYPE = ANGULAR
HOME = 0.0
MAX_VELOCITY = 900.0
MAX_ACCELERATION = 350.0
STEPGEN_MAXACCEL = 700.00
SCALE = 106.667
FERROR = 1
MIN_FERROR = .25
MIN_LIMIT = 0.00
MAX_LIMIT = 360.0
HOME_OFFSET = 0.00000
HOME_SEARCH_VEL = 12.0000
HOME_LATCH_VEL = 0.7
HOME_SEQUENCE = 1
I have to change just in .ini file or too in other files?
Many Thanks for Your great Help!
Kind Regards
Luciano
Many Thanks for your quick answer!
Please can You write to me the formula to calculate 106.667 Steps/degree?
Please can You confirm this code is ok?
This is the code of my A Axis in .ini file:
[AXIS_3]
TYPE = ANGULAR
HOME = 0.0
MAX_VELOCITY = 900.0
MAX_ACCELERATION = 350.0
STEPGEN_MAXACCEL = 700.00
SCALE = 106.667
FERROR = 1
MIN_FERROR = .25
MIN_LIMIT = 0.00
MAX_LIMIT = 360.0
HOME_OFFSET = 0.00000
HOME_SEARCH_VEL = 12.0000
HOME_LATCH_VEL = 0.7
HOME_SEQUENCE = 1
I have to change just in .ini file or too in other files?
Many Thanks for Your great Help!
Kind Regards
Luciano
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- Todd Zuercher
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11 Jul 2017 15:02 - 11 Jul 2017 20:40 #95671
by Todd Zuercher
Replied by Todd Zuercher on topic Formula to calculate the right SCALE
I thought I kind of did.
I'll try again.
Step motor's Steps/rev (including micro-stepping) = S (3200)
Motor Revolutions / Rotary Axis revolution = R (12:1)
Rotational Units(/rev) = U (360 degrees)
Steps per Unit = S*R/U = 3200*12/360 = 106.667
Yes, that is where you put it. I don't think you need to put it any where else.
I'll try again.
Step motor's Steps/rev (including micro-stepping) = S (3200)
Motor Revolutions / Rotary Axis revolution = R (12:1)
Rotational Units(/rev) = U (360 degrees)
Steps per Unit = S*R/U = 3200*12/360 = 106.667
Yes, that is where you put it. I don't think you need to put it any where else.
Last edit: 11 Jul 2017 20:40 by Todd Zuercher.
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11 Jul 2017 20:23 #95696
by Banda68
Replied by Banda68 on topic Formula to calculate the right SCALE
Dear Todd Many Thanks for your great Help!
Many thanks too for your quick answer!
Have a nice day
Luciano
Many thanks too for your quick answer!
Have a nice day
Luciano
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