Hi,
For slower speed of engine, I’m look for use less volt.
With power supply 36.5V 600W, if use with MCC / MCC bigger than 12 A, the IONI Fault. 12 A is the maximum
The Fault code:
LSS for Red
LLS for green
For information:
Small Mige
IONI Pro HC
Simucube
MPP: 600W
FOC: Maximum
FOV: 50 DC
FUV: 20 DC
I check the “Measure resistance & inductance”
Granity: 1.13
IONI: 1.6.1
I don’t understand why it’s not possible for more Amp ?? 
Can you check the fault reason from Granity testing tab?
I would guess its an undervoltage fault, but I could be wrong.
If its the initialization fault, please state your MMC and MCC values. There should always be some small difference between them - for example MCC 10 A and MMC 12.86 A.
[ ] Initialized !
[ ] Error recovering
[ ] Tracking error warn
[ ] Target reached
[X] Enabled
[ ] Run (drive active)
[ ] Homing active
[ ] Braking
[X] Permanent stop !
[X] Voltages good
[X] Fault stopped !
[ ] Ready for use
[ ] STO active
[ ] Tracking error
[ ] Over velocity
[ ] Hardware
[ ] Over temperature
[ ] Feedback
[ ] Over current
[ ] Internal comm error
[ ] Power stage forced off
[X] Under voltage !
[ ] Over voltage
[ ] Motion range
[ ] Firmware error
[X] Init !
[ ] Motion
[X] SimpleMotion !
Fault location ID1 440502 ?
Fault location ID2 0 ?
! = reasons for inactivity[X] GPI 1
[X] GPI 2
[X] GPI 3
[ ] GPI 4
[X] GPI 5
[ ] GPI 6
[ ] HSIN 1
[ ] HSIN 2
[ ] ANA1 as digital
[X] ANA2 as digital
[X] ENC A
[ ] ENC B
[ ] ENC C
[ ] ENC D
[X] Hall U
[ ] Hall V
[X] Hall W
[X] Soft enable
[X] Phys enable
[X] Pos feed enable
[X] Neg feed enable
[X] Home switch
[ ] Clear faults
Analog in 1 -0.11 V
Analog in 2 0.00 V
Analog Enc A 3.76 V
Analog Enc B -3.70 V
HV bus voltage 36.2 VDC
Device temperature 31 °C
Actual current limit ±13.0 A
Last limit reason Voltage limit
Output current 0.00 A
Velocity feedback 0 r/s
Velocity feedback (raw) 0
Position feedback -2250
Setpoint value 0
Debug 1 -1
Debug 2 0
Debug 3 -1
Debug 4 -1
Debug 5 -1
Debug 6 -1
Parameters
| GCFWVER=10601 | FWVER=-1 | HWTYPE=11201 | HWSERIAL=112011468
| BUILDREVISION=722e9ce | CEI=2 | UID=35f409b1 | SMO=0
| TRF1=0 | TRF2=0 | TRA1=0 | TRA2=0
| MPP=600 | NOTCHFILT=655616 | TED=0 | TEF=0
| TEI=0 | SERIALENCBITS=6 | COMMUTATIONCFG=53775 | FBR=10000
| FBD=1 | FB2D=0 | TBW=6 | KVP=2200
| KVI=30 | KPP=50 | VFF=0 | AFF=0
| PFF=85 | CM=2 | MT=3 | AD=0
| FLAGS=196628 | MMC=13 | MCC=13 | FOC=6
| FOV=50 | FUV=20 | FPT=1000 | FVT=100
| FEV=140 | FMO=0 | LSF=1 | AXS=1
| AXT=3 | FFT=0.1 | TSR=0 | TCH=0
| TTR=1 | TBT=0 | CRI=3 | DIV=100
| PIF=2500 | MUL=100 | CAL=32 | CSD=10
| CVL=1400 | CRV=100 | MR=2.722 | ML=9.035
| MTC=2300 | MPC=8 | MMS=1000 | CAO=0
| HOMING=0 | HMV=100 | HMA=10 | HMH=500
| HMT=1 | HHL=0 | HLL=0 | HMF=0
| HSA=0 | HSS=0 | overrideAddr1=0 | overrideAddr2=0
| overrideAddr3=0 | overrideVal1=0 | overrideVal2=0 | overrideVal3=0
| BED=1.5 | BER=0 | BDD=1 | CAPS1=1.04832e+06
| CAPS2=3999
The problem arrive just after stop and re-start.When the motor turn for initialise.
OK I change MCC MMC for see
MCC: 12
MMC: 13
Same problem
It does indicate under voltage fault. What is the current rating of that power supply? What is the make and model? If it is Meanwell or other reputable manufacturer, then I would expect no under voltage. But for a chinese ebay supply, anything is possible…
I check the voltage when I restart the drive with multimeter. Don’t move, always 36 V
Chinese MWKJ S-600-36
There might be ripple in voltage that could trip the fault.
OK, I look for change … 
Hi Pascal, what is the coil-resistance of your servo? It is possible that it is to high for 36V to drive the requested current through the stator, hence the UV fault.
Post it here so we can calculate max current you can push with 36V for that servo.
Edit: Ok, the coil-resistance for your servo is 2.7R
So Ipos = (V/Rx0.92) (Assume 92% efficiency in practice for IONI)
(36/2.7)x0.92) = 12.26Apos
To convert Ipos to Irms divide Ipos/1.4142 (12.26Apos = 8.67Arms)
So if you are setting over ~12.26Apos in Granity, then you will get UV fault.
Cheers,
Beano
His MR is 2.722. I wonder if it is calculated with the measurement function in Granity or set by hand.
Hi Mika,
36V is not enough to drive higher current through the stator. It will fault over ~12Apos. See above.
So all good with his hardware.
Anyway, he get’s close enough to max small MiGe peak current with this combination, so it is ideal for what he wants.
HA, all good, I know how long hours you guys work - I am amazed your brain is still functioning at those hours, mine just shuts down 
OK thanks for your answer. 
Cheers, you’re welcome!
I’m back, I work on my set-up… 
How calculate the torq with 36 V power supply ?
I have calculated maximum current above, 12.26Apos. 12.26/1.4142= 8.7Arms. Arms x Torque coeff = max torque. For small Mige, torque coefficient is 2.2NM/A.
Thus you can get maximum of 19.14NM at 36V - more than good enough I would say and a pretty well-balanced setup, if you are after lower rpm/slightly slower response.
Cheers,
Beano
OK the tension don’t work for Torq.
For calculate the power of the supply. You use Apos or Arms ??
The torque setting displayed in the tuner is not accurate yet, I think Mika will fix that at some point, not a high priority now. I use Irms multiplied by torque ratio to calculate theoretical torque, it is very close to practice.
Cheers,
Beano