MichelH
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Posts posted by MichelH
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Hello
Ixx66 fonction is not clear for me:
I also have to controle different motors (Brush and brushless motors) with Geo Macro drives. I read the chapter "setting up turbo motor operation"
and as described Ixx66 = 16384 (p. 80, Geo Macro Drive User).
Regarding Sina's answer, I don't really understand the role of Ixx66: For example, my drives input is 230 VAC (then a 325 VDC). Then I should use a transformer for my input voltage in order to controle 110 VDC motors (that was my first idea before I read the spec of Ixx66)?
And I read in Turbo SRM's quote: "If Ixx66 is set to a smaller value than PWM maximum count, it serves as a voltage limit for the motor (Vmax = VDC * PWM_Max_Count / Ixx66)" (source: Software reference manual: Turbo Pmac/Pmac2, p. 106)
I also understand that for Geo Macro, Ixx66 is a constant. So how can I controle the output voltage, if not with Ixx66?
Thank you for your clarification
MH
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Thank you very much serkan!
I will try to understand this way! I'm not familiar with DAC/ADC but your explanation seems clear!
Thanks again
Michel
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Hello
I am a new user of turbo Pmac. I'm working with Etel motors and amplifiers for current regulation and position servo loop via Macro done by Pmac.
I read the manual and some of the post on the forum but I still don't understand how to figure out my problem.
I made my regulation loop with physical units in order to convert my gain in Pmac units
Here's the pmac position loop regulation to understand what I mean (schema is available at p. 152 of Turbo Pmac user manual)
I calculate my gain with physicals unit (wich correspond with the logic of the schema)
- Proportionnal gain Kp (as Pmac Ixx30) [A/rad] or [A/m]
- Derivative gain Kd (as Pmac Ixx31)
- Integral gain Ki (as Pmac Ixx33) [1/s]
(units are: A: ampere, rad: radians, m: meters, s: second)
I am aware that Pmac units are [count] I also know:
Ixx69 the max. output current
How many count to make a motor turn (or 2 Pi rad).
I also read the units of Ixx30 (Kp) which are Ixx08/2^19 and the same logic for Ixx31 and Ixx33.
But I can't figure out the unit conversion
I hope you can understand what I mean, I would be glad to explain more If you want.
Thank you
Michel
- Proportionnal gain Kp (as Pmac Ixx30) [A/rad] or [A/m]
Geo Macro with DC Brush Motor
in Turbo PMAC
Posted
Ok, it is now clear for me!
Thank you very much for your answers!