[miseree]

Does anyone have a recommendation/experience on what wiring is best for the 906 oz-in Keling Motor? Parralel/Series/Unipolar? Everywhere I have seen suggests trial and error to see which works best. Has anyone tried all configurations on their x3 (CNC fusion deluxe kit with upgraded ball screws)?

[miseree]

For anyone reading, I posed this question to John (Keling Inc / Automation Technologies). He suggested that the motor be wired in bipolar parallel for this configuration.

[H500]

Bipolar parallel is almost always the best one to use for most systems.

[kawazuki]

Yeah replace it with the Keling Nema34 465oz in motor that is designed for the drive! The 906 won't perform half as well as that one if you are handicapping it by feeding it a max of 3.5A
And its $30 cheaper!

[Crevice Reamer]

Yeah replace it with the Keling Nema34 465oz in motor that is designed for the drive! The 906 won't perform half as well as that one if you are handicapping it by feeding it a max of 3.5A
And its $30 cheaper!

The 465 requires 6 amps to get the 465 oz. Detuning it to 3.5A will give you only 271 oz.

This is NOT enough for good Z performance on the (s)X3.

The 906 requires 6.1A to get 906 oz. Detuning IT to 3.5 A will provide 520 oz.

The pulley which comes with the CNC Fusion kit will up this to 640 oz.

This works well.

Yes, Parrallel wiring is best.

CR.

[hoss2006]

The 465 requires 6 amps to get the 465 oz. Detuning it to 3.5A will give you only 271 oz.

This is NOT enough for good Z performance on the (s)X3.

The 906 requires 6.1A to get 906 oz. Detuning IT to 3.5 A will provide 520 oz.

The pulley which comes with the CNC Fusion kit will up this to 640 oz.

This works well.

Yes, Parrallel wiring is best.

CR.

Try this one.
NEMA34 465 oz/in 3.5A Stepper Motor Dual Shaft (KL34H260-35-4B)
High-Torque Stepper Motor, Stepper Motor, Driver, Stepper Motor kit, DC Servo Motor, DC Servo Motor kit, Stepper Motor Power Supply, CNC Router, Spindle, and other Components. Automation Technology Inc
Hoss

The inductance is a little high but the new nema 23 570 oz/in 3.5 amp motors will work too for even less money.
KL23H2100-35-4BM

[Crevice Reamer]

Thanks Hoss!

Guess I was looking at the wrong 465. That one should work ok, although it will still be 55 oz less torque. Not a bad trade-off for $30 less.

CR.

[H500]

I use a 280 oz-in motor at 40v, geared down approx 2-1 on my sx3 z axis. The rapid is more than 100ipm with a gas spring, and about 90ipm without.

It's under powered for drilling, but my gas spring is 140lb. I should have used 80.

[Crevice Reamer]

I still recommend the 906 for (s)X3 Z power with G 540. Not only will it provide more torque, but its Voltage requirement of 58V more nearly suits the G 540.

(Using the formula for best Voltage: 32 times the square root of motor inductance in mH)

The 465, while matching the G 540s 3.5A, has a slightly higher Voltage of 66V. (This may detune top speed slightly at 48V.) It's still a viable option though, just not the best in my opinon.

The 570, while 3.5A, has a WAY higher Voltage requirement of 81V.

I cannot recommend using 1/4 inch shaft motors for heavy lifting loads on Z. These shafts have been known to shear off from such loads. A 1/2 inch shaft for Z just makes more sense to me. And, if you have to add a gas spring to it, cost savings dwindle.

The old saying:"You get what you pay for" comes to mind. Some things are just worth paying a little more for.

CR.

[H500]

If I was buying today, I would go with the KL23H2100-50-4B. 3.5A will give 400oz-in. The 2.5mH inductance is well matched to the 50v rating of the g540.

The motor will be able to spin faster, making it possible to use a higher drive ratio for more torque.

[vcatalasan]

[QUOTE=H500;1219147]If I was buying today, I would go with the KL23H2100-50-4B. 3.5A will give 400oz-in. The 2.5mH inductance is well matched to the 50v rating of the g540.

The motor will be able to spin faster, making it possible to use a higher drive ratio for more torque.[/QUOTE

I asked Keling about that stepper several days ago but but got this response

Can you tell me if this stepper motor will work for the G540?

KL23H2100-50-4B

Thanks,

Vic

This is their response

--------------------------------------------
for g540, you need KL23H2100-35-4B

[vcatalasan]

Sometimes going with what users recommend is more useful than what manufacturer recommends?

[doorknob]

Sometimes going with what users recommend is more useful than what manufacturer recommends?

Keling is not the manufacturer of those motors, nor are they the manufacturer of the drive. Rather they are merely a distributor.

[vcatalasan]

My bad, I thought they would at least spec these motors out?

[Crevice Reamer]

If I was buying today, I would go with the KL23H2100-50-4B. 3.5A will give 400oz-in. The 2.5mH inductance is well matched to the 50v rating of the g540.

The motor will be able to spin faster, making it possible to use a higher drive ratio for more torque.

This may work well for X and Y and offer a slight torque (detunes to 400 oz from 570) and speed increase over 381. It costs $5 more than 381 though. It's likely a wash. I would probably still go for the simpler 381.

CR.

[vcatalasan]

I ordered my 906 stepper, but DSP did not have all the items in stock, will try CNC fusion if they can sell me a set.

So I have an extra 380oz motor that I want to power a tapping unit similar to what Hoss made.

Vic

[H500]

This may work well for X and Y and offer a slight torque (detunes to 400 oz from 570) and speed increase over 381. It costs $5 more than 381 though. It's likely a wash. I would probably still go for the simpler 381.

CR.

You also get a 3/8" shaft instead of 1/4.

[juano2001]

Sorry to Hijack...

CR, I recently ordered the 906 motor and also the cr pulley (now standard) option from cnc fusion. Can you tell me the steps per that you use in mach3 for the Z and also what if any size resistor you used on the 906 wiring

Cheers

[Crevice Reamer]

Sorry to Hijack...

CR, I recently ordered the 906 motor and also the cr pulley (now standard) option from cnc fusion. Can you tell me the steps per that you use in mach3 for the Z and also what if any size resistor you used on the 906 wiring

Cheers

Hi Juan.

Seems on topic to me.

200 x 5TPI X 10 microsteps = 10,000 SPI. Now to adjust for pulley gearing:

Drive pulley is 14 teeth. Shaft pulley is 18 teeth for a ratio of about 1.29:1.

520 detuned ounces x 1.29 = about 670 oz.

10,000 SPI x 1.29 = about 12,900 SPI. This is not exactly accurate, I rounded some decimals, but it is a ballpark. You would have to tweak a little for individual mechanical differences in your machine anyway.

Easiest way is to let Mach3 calculate this for you.

You MUST use a resistor or G 540 will allow motors to run hot.

Order some of THESE:
http://www.digikey.com/product-detai...8KXBK-ND/13132

They are good for 381 and 906 both.

CR.