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### double check my numbers and follow error

Posted: **Wed Sep 04, 2019 11:04 pm**

by **turbothis**

ok so now i have a real nice 2000P/R encoder on the spindle servo

the servo is now 14 tooth and the spindle 26 tooth. 0.53846153846 ratio

so invDistPerCycle is 0.000375

count/rev in kmotioncnc 14814.8148148

and A axis count/deg 41.1522633722

my god my brain is exploding

might get a dam 28 tooth for the spindle.

### Re: double check my numbers and follow error

Posted: **Wed Sep 04, 2019 11:16 pm**

by **TomKerekes**

invDistPerCycle is 0.000375

correct.

servo is now 14 tooth and the spindle 26 tooth. 0.53846153846 ratio

correct

count/rev in kmotioncnc 14814.8148148

and A axis count/deg 41.1522633722

No, I get:

2000 x 4 x 26 / 14 = 14857.142857142857

/ 360 = 41.269841269841269

### Re: double check my numbers and follow error

Posted: **Wed Sep 04, 2019 11:23 pm**

by **turbothis**

thanks

i put that in and S1000 (MDI) but get 798 actual rpm?

### Re: double check my numbers and follow error

Posted: **Wed Sep 04, 2019 11:27 pm**

by **turbothis**

#define SPINDLEAXIS 2 // Axis Channel to Jog to rotate Spindle

#define FACTOR (11832.8889/60.0) // to convert RPM to counts/sec (counts/rev / 60.0sec)

#define SPINDLECW_BIT 154

#define SPINDLECCW_BIT 155

#define SPEEDVAR 99 // global persistant variable to store latest speed

#define STATEVAR 98 // global persistant variable to store latest state (-1=CCW,0=off,1=CW)

#define KMVAR PC_COMM_CSS_S // variable KMotionCNC will pass speed parameter (113)

#define USE_POS_NEG_VOLTAGE 1 // 0 = output Magnitude, 1 = output positive and negative speed

so now it is 14857.142857142857 for the FACTOR?

### Re: double check my numbers and follow error

Posted: **Wed Sep 04, 2019 11:34 pm**

by **TomKerekes**

i put that in

what? where?

so now it is 14857.142857142857 for the FACTOR?

Yes

### Re: double check my numbers and follow error

Posted: **Wed Sep 04, 2019 11:41 pm**

by **turbothis**

i meant i put in the new numbers for counts per rpm and counts per degree

i also punched in the new number to the factor and all seems to be working now just fine

i hate my 75$ construction calculator just rounds things real easy and online calcs are kinda silly to use. that and a crazy long number..........AAAAAAAAAAAAAAAA