[michel colonade]

hi everybody
i am sure that this question have been asked few times, but i didn' t find a realy answer to it
i have 4 steppers motors with those characteristics :
model : 34HST9805-37B2
Step angel ( ° ) : 1.8
Rate Voltage(V) : 6.4
Rate Current (A) : 2
Phase Resistance ( Ω ) : 3.2
Phase Inductance (mH) : 15
Holding Torque (oz.in) : 880
Lead Wire (NO.) : 8
Rotor Inertia (kg. c?) : 7

i have also a geckodrive G540.
my question is : what power supply do i need for them, and how can i know how to connect the 8 wires
unfortunaly, all i have is in chineese, and i don' t understand chineese

[automationtechinc]

Hi Sir

email specification to:[email protected]

We will help you to find how to wire

You need a 48VDC,7.3A power supply

http://www.kelinginc.net/StepperMotor.html

[automationtechinc]

Based on the drawing:


This is only for G540 for your refrence
A+: Red/Blue
A-: Yel/Blk
B+: Wht/Brn
B-: Org/Grn

http://www.kelinginc.net/StepperMotor.html

[michel colonade]

do that mean that :
red/blue goes to pin number 6
yellow/black to pin number 7
white brown to pin number 8
and org/green to pin number 9

[Crevice Reamer]

Hi Michel.

The specs you have given are for a 124V 2A Series connected motor. If wired in Series, it will not be a good match for G540. However, wired Parallel, it would be a 61V 4A motor, and a VERY good match. At the G540 Max 3.5A, it would detune slightly to 770 Oz.

I don't have any wiring color diagram to go by, so I really hope that the wiring instructions from Keling are for Bipolar Parallel and NOT Bipolar Series.

CR.

[michel colonade]

thank you crevice
i attach the diagram that i reiceved from the chineese seller, i am pretty sure that you do not understand chineese, but you will certainly understand better than me according to this diagram.
i want like you suggest, to connect those motors in parralel
do you mean that for a parallel connection, i need a power supply with 61v 4amp, do you know a place where i can buy one like that.[ATTACH][/ATTACH]

[Crevice Reamer]

You're OK. John has given you good advice for parallel wiring. Red/Blue to pin 9, Yel/Blk to pin 8, Wt/Brn to pin 7 and Org/Grn to pin 6. A 48V, 7.3A is proper PSU:
http://kelinginc.net/SwitchingPowerSupply.html

Use a 3.5K or 3.48K current limit resistor like this one:
3.48KXBK-ND
http://search.digikey.com/scripts/Dk...K-ND&x=15&y=19

While you are ordering from Digikey, might as well also get some spare F2318-ND G540 fuses:
http://search.digikey.com/scripts/Dk...&name=F2318-ND

CR.

[michel colonade]

thank you so much crevice, now i can go on and ordering what i need.
what happen if by mistake, i was connecting A- INSTEAD A+ and vice versa (also B+ instead B-) ?

i also ordered last week, a ncpod (usb emulator) to connect directly to pc via usb, i will connect it to the G540.
has anyone an idea of a possible wiring diagram between the Ncpod and the G540
the supplyer of ncpod gave me these several instructions :

"You will need to make a Pigtail connector harness that goes from the ncPod's MTA connectors to a DB25 connector. You will need to connect the Step and Direction signals for each axis along with a single Ground. You will also need to connect a switch to the G540's Enable input so that you can enable/disable the motor drivers. That's all you need to get started."

i understand that i have to do a connection from the MTA connectors from the Ncpod to the parallel port of the G540, i think that i am able to find the step and dir pins, but where do i have to connect the single ground ?
and i do not understand what is the switch to the G540

[Crevice Reamer]

Cyan is difficult to read, so I changed it to red:

thank you so much crevice, now i can go on and ordering what i need.
what happen if by mistake, i was connecting A- INSTEAD A+ and vice versa (also B+ instead B-) ?

Nothing much if you switch BOTH motor wirings. If you switch only ONE, then the motor will run in reverse.

i also ordered last week, a ncpod (usb emulator) to connect directly to pc via usb, i will connect it to the G540.
has anyone an idea of a possible wiring diagram between the Ncpod and the G540
the supplyer of ncpod gave me these several instructions :

"You will need to make a Pigtail connector harness that goes from the ncPod's MTA connectors to a DB25 connector. You will need to connect the Step and Direction signals for each axis along with a single Ground. You will also need to connect a switch to the G540's Enable input so that you can enable/disable the motor drivers. That's all you need to get started."

i understand that i have to do a connection from the MTA connectors from the Ncpod to the parallel port of the G540, i think that i am able to find the step and dir pins, but where do i have to connect the single ground ?
and i do not understand what is the switch to the G540

Step & direction are Parallel port pins 2-9. They will connect to pins 2-9 of DB25 connector. Single ground can go to DC negative terminal of PSU, same as G540 terminal 12 should.

http://cnczone.com/forums/showthread...=106312&page=7

The switch is the NC EStop switch and one wire of that connects to G540 terminal 10 and the other wire also goes to the PSU DC negative terminal. I recommend THIS big red mushroom switch:
http://kelinginc.net/CNCPackage.html

BTW, would you please post a link for those N34 motors? They are a good N34 match for the G540 and others might like to have them.

CR.

[michel colonade]

this is the link for the steppers
http://cgi.ebay.com/ws/eBayISAPI.dll...:X:AAQ:US:1123

i bought them for 309$
today i runed them with mach3, and they seemed very smooth, and have no noise at all
michel

today, i read the gecko 540's manual, and they say there that the maximum power supply that should be used with it, have to be at a maximum of 50v
do you think that a 61v power supply will match with the G540 ?

[Crevice Reamer]

this is the link for the steppers
http://cgi.ebay.com/ws/eBayISAPI.dll...:X:AAQ:US:1123

Thanks for the link. $129 shipping--OUCH!!

today, i read the gecko 540's manual, and they say there that the maximum power supply that should be used with it, have to be at a maximum of 50v
do you think that a 61v power supply will match with the G540 ?

NO!!! Absolutely not. Anything over 50V can fry G540. You CAN operate 61V motors on 48V quite well though. There are people out there getting reasonable speeds out of 85V motors with G540 & 48V. The Keling 387s that power the Iron Man router to 250 IPM are 65V motors.

[nomedia="http://www.youtube.com/watch?v=VQsRHXumcgw&feature=player_embedded"]YouTube - IronMan CNC Router 4 Axis[/nomedia]

Your motors are fairly close to optimum Voltage, and the 48V 7.3A PSU is PLENTY of power for these motors. I estimate they should be capable of 1100 to 1200 RPM with the G540 & 48V.

CR.

[Crevice Reamer]

I think this motor would be GREAT with the G540. Detuned to 770 oz at 3.5A, it is the strongest N34/G540 combo I have seen to date. This would run an (S)X3 Z axis WITHOUT special pulleys.

I hope John at Keling is looking into stocking something like this.

CR.

[michel colonade]

ok, i finished now this DXF file
the only point that i didn' t fix is from what post, and to what post is going the single ground
michelncpod to G540.dxf

[mnwolgamott]

Micheal did you ever solve the problem of drivers for the chinese motors 34HST9805-37B2, I have similar problem where motors do not seem to deliver promised torque. trying to find a reasonable priced solution, to what is becomming an expensive lesson.

[fedravasek]

Micheal did you ever solve the problem of drivers for the chinese motors 34HST9805-37B2, I have similar problem where motors do not seem to deliver promised torque. trying to find a reasonable priced solution, to what is becomming an expensive lesson.

For this motor you need source power about 124v. because induction is 15 for parallel connection. sqrt15 * 32 = 123.9v (optimal).:stickpoke
I have 300rpm for 80v with good torque

Best regards!

[Crevice Reamer]

I have made a mistake.

After closer examination of the Chinese diagram, I must conclude that the 2A specs are not SERIES, but UNIPOLAR wiring. The actual specs for Parallel wiring are 2.8A and 15 mH inductance. That means this motor will require 124V for best performance. At the G540 48V, the motor will run slow, so it's NOT the good match that I originally thought it was.

I'm very sorry Michel, and hope you have not already ordered it.

If you need a N34 motor to use with G540, the best one currently available is the Keling KL34H295-43-8A 906 that detunes at 3.5A to 522 OZ.

CR.

[michel colonade]

thank you crevice
unfortunaly, i already have those motors
they actualy turn at 660 rpm
it is a little slow
can i buy new drivers from gecko that will match better with those motors ?
michel

[Crevice Reamer]

thank you crevice
unfortunaly, i already have those motors
they actualy turn at 660 rpm
it is a little slow
can i buy new drivers from gecko that will match better with those motors ?
michel

Not really. The larger Geckos are limited to 80V. That would get you about 200 more RPM, but it would probably be cheaper to get the Keling 906 motors to run with the G540. THEY would run 1200+ RPM with 48V & G540.

What are you going to run with these motors? Maybe you don't need N34, and could use smaller, less expensive, N23 motors, like the $49 Keling KL23H2100-35-4B.

I'm so sorry to have given you bad advice.

CR.

[michel colonade]

do not worry crevice, you are not guilty
i reiceved those motors before you started to help me on this forum.
for your question : i am a sculptor, and i carve stone elements, but last year i had an accident and now it is more difficult for me to work (jerusalem stone is very hard for a limestone) , so i introduce myself into the cnc world, to try building a cnc machine that will replace me (it is scary to speak like that, machines replacings human beans !!!)
so i am in my first project, first cnc machine for stone and marble machining
i am planing to build 6 others machines for my factory, of course after i will be more experimented after this first one.
you are cool
michel