[ixx72 - 6 pole pair motor]

Steadily more confused....

 

http://www.deltatau.com/manuals/pdfs/TURBO%20SRM.PDF page 130 "A commutation cycle, or electrical cycle, consists of two poles (one pole pair) of a multiphase motor."

 

So I have 6 pole pairs, electrical cycle = 360 / 6 = 60degrees

 

I did have for my LV config:

Ixx70 = 6

Ixx71 = 2097152 ; this is a full revolution in counts

 

I now think I need:

Ixx70 = 6

Ixx71 = (2097152 /360) * 60

 

The Geobrick LV manual seems to agree with this, page 170 http://www.deltatau.com/manuals/pdfs/GEO%20BRICK%20LV.pdf

 

I would greatly appreciate anyone sanity checking that for me please.

[ixx72 - 6 pole pair motor]

I would like to check my understanding of Ixx72 in relation to commutation of a brushless motor.

 

I have a three phase brushless motor with 12 poles. Reading the SRM 683 or 1365 is typical for a three phase motor. ie 360/3 = 120degrees

 

However I am unsure whether because I have a high pole count motor the phase angle is smaller, 60 degrees?

 

12 poles

6 pole pairs

360 / 6 = 60 degrees

 

 

Cheers,

[Stepper - High pole Brushless or MicroStepped]

Hello,

 

I have a Turbo PMAC LV driving a (Motor 1) Stepper Motor with high resolution linear encoder, and some inherited code. I am struggling to determine if the Author is trying to drive the stepper closed loop as a high pole count brushless motor? or as a direct micro stepped stepper. Reading around it looks like the Author might be trying to do a bit of both?

 

In particular the following ref http://forums.deltatau.com/attachment.php?aid=179 seems to disagree with the motor protection bits in PLC 6.

 

The axis (Motor 1) is a Sanyo 1.8 degree 2 phase stepper, driving a ball screw stage, the encoder is a linear tape type with quadrature outputs.

 

It could well be that since the Geo Brick LV Setup Assistant now supports steppers as 'high count pole-pair brushless motors" then whatever way was being done could be improved?

 

Although looking at the spreadsheet I am confused about if I should select stepper or brushless for Cell B13?

 

Regards,

 

Chris

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