Changing TMC2660 into TMC2130

Stan

@brunofporto oh okay thanks man! What does the stealth chop do then? If the TMC2660 is already that silent?

dc42

@stan said in Changing TMC2660 into TMC2130:

I am mostly looking into the silent/stealth chop (seen and heard it on a prusa) since my printer is installed in the office and makes a lot of noise.. @dc42

Most users of the Duet find that the TMC2660 drivers make their motors silent or nearly silent. A few users with high inductance motors find that they need to tweak the chopper control settings to avoid noise at standstill. The interpolation to x256 microstepping is responsible for the noise reduction.

Stealthchop mode on the TMC2130 is reported to be useless for 3D printing because it causes problems at high speeds. Stealthchop 2 on the TMC2224 used on the Duet Maestro is better, but you still have to switch them to spread cycle at high speeds.

Stan

@dc42 okay thanks a lot man! I think i am just going to buy the ethernet then? Not really looking into tweaking a whole lot of settings

dc42

@stan said in Changing TMC2660 into TMC2130:

@dc42 okay thanks a lot man! I think i am just going to buy the ethernet then? Not really looking into tweaking a whole lot of settings

What motors do you have? If they are low-current high-inductance motors then the Maestro may be more suitable, unless you need stall detection.

Stan

@dc42 it's a dual extruder printer with 5 nema 17 steppers if i'm not mistaken

dc42

@stan said in Changing TMC2660 into TMC2130:

@dc42 it's a dual extruder printer with 5 nema 17 steppers if i'm not mistaken

OK, but do you know the specification or model number of the stepper motors?

Stan

@dc42 it's a 48mm stepper, thats all i know sorry... It's a leapfrog Creatr HS and i bought it whole.

dc42

@stan said in Changing TMC2660 into TMC2130:

@dc42 it's a 48mm stepper, thats all i know sorry... It's a leapfrog Creatr HS and i bought it whole.

Do the stepper motors have labels on them?

Stan

@dc42 no sorry they pulled off all the stickers from the motors.. i think they're just the nema 17's from most printers?

dragonn

@stan nema 17 is only a form factor. They are many, many different motors with are nema 17.

Stan

@dragonn oh ok thanks! Only info i can get atm is from their site and it says "nema 17 (48mm)"

briskspirit

@stan Look closer, there should be a laser engraved model number maybe on the back

dc42

If there really isn't a sticker, measure the motor length (48mm?) and the resistance of one winding. Then look at https://www.omc-stepperonline.com/nema-17-stepper-motor for a motor with the same length and similar phase resistance. That will give you a good indication of the rated current.

Some printers use one type of motor on the X and Y axes and a different type for the Z axis, especially if they have two Z motors.

Stan

@dc42 @briskspirit there is neither a laser engraved model number or a sticker... I have just mailed the company for mor details. If i can't get more info from them i'll try the method of measuring the length and resistance. Thank you all for your quick responses!

Stan

@dc42 okay measured the phase resistance at 1.8ohms, think that means between 1.5 and 2A? And found out i have 2 Y motors.. guess i overlooked one. So in short: 6x bipolar stepper motors with a current draw between 1.5 and 2 amps. Hope this helps you and me out? Thanks again man!

dc42

It looks like those motors would be a good match for the TMC2660.

Stan

@dc42 and what about the secondary Y-motor? Just wire it in with the other one but switch out two wires?

dc42

@stan said in Changing TMC2660 into TMC2130:

@dc42 and what about the secondary Y-motor? Just wire it in with the other one but switch out two wires?

Three possibilities:

Wire the two Y motors in series. That way they get the same current. If you have only one Z motor, then the simplest way to achieve this would be to connect the Y motors to the two Z outputs, and the Z motor to the Y output. Then use the M584 command in config.g to swap Z and Y.
Wire them in parallel, and double the Y motor current in the M906 command in config.g.
If you have only one extruder then the E1 motor output will be free. So you can connect one motor to the Y output, and the other to the E1 output, and use the M584 command in config.g to tell the firmware you have done that.

If you are using 24V power then series connection should work well. If you are using 12V power then I suggest one of the other two options.

Stan

@dc42 okay thanks a whole lot again man! Did not see there were 2 Z connectors... Decided to go with the duet ethernet. Then i'll try to change the Z and Y then in the slicer. I'll order soon!