Duet WiFi: Configuring Steppers on a Prusa-style (TMC 2660)

Duet WiFi: Configuring Steppers on a Prusa-style (TMC 2660) I've never used *anything* Trinamic before, and I can't figure out how to configure the steppers. I'm running a Prusa-style printer. Two Z steppers, one X and one Y. All motors are 1.8 degree. The Z axis of all things is giving me the most problems. I've set the current for Z to 1200ma. It's an 8mm pitch leadscrew, holding about 500mm of V-slot Aluminum 2020, and about 300g of extruder. Shouldn't be too much for the motors to handle, right? However, the left motor, connected to ZA, is overheating while the one connected to ZB is only mildly hot. Also, when in motion, it's really easy for me to stop one of the motors with my hand, yet at idle (idle current set to 40%) it's about as powerful as I'd expect from a TI or Polulu driver. It's also ridiculously noisy both at standby and at in motion (though they were dead quiet with no load) Z axis runs 400 steps/mm, max 900mm/min (15mm/s), other axis 53.3 steps/mm, max 9000 mm/min (150 mm/s) Is there a way to change idle current per driver? The Y axis is really easy for me to move by hand at idle, but the Z axis is fine at idle. Why is my Z axis so noisy, yet so weak when in motion? I thought stallguard was supposed to prevent that. Same for Y axis at idle. https://reprap.org/forum/read.php?416,713763,713763#msg-713763 Tue, 13 Oct 2026 00:32:20 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?416,713763,714142#msg-714142 Re: Duet WiFi: Configuring Steppers on a Prusa-style (TMC 2660) https://reprap.org/forum/read.php?416,713763,714142#msg-714142 duet3d.com].]]> dc42 Duet Sat, 15 Oct 2016 13:21:52 -0400 https://reprap.org/forum/read.php?416,713763,714100#msg-714100 Re: Duet WiFi: Configuring Steppers on a Prusa-style (TMC 2660) https://reprap.org/forum/read.php?416,713763,714100#msg-714100
I've switched out the Z motors to these 2A motors. They're quite a lot quieter now, though not as quiet as the other drives. Running a million times cooler though. Completely forgot to check the current rating, I assumed they were all 2A.

Can I still use the 0.4A motors for a bowden extruder, or are they basically useless with the standard tmc2660 drivers?

Thanks so much for your help!]]> kenblu24 Duet Sat, 15 Oct 2016 10:07:47 -0400 https://reprap.org/forum/read.php?416,713763,714037#msg-714037 Re: Duet WiFi: Configuring Steppers on a Prusa-style (TMC 2660) https://reprap.org/forum/read.php?416,713763,714037#msg-714037

Quote
kenblu24
The motors seem to be about the same temperature now. I've checked each motor to make sure that the wires terminate correctly, and the windings don't seem to be shorting to each other if that's what you meant (sorry, not experienced with electronics at all) I made sure that there was nothing conductive under the duet, and nothing seems to be touching the connectors or wires. They're the same motor. Here's a YT video with the sound.

The problem is that those motors are not a good choice for a 3D printer. You won't ever get smooth movement at high speeds using them, although you will get better results if you use 24V power instead of 12V. I suggest you plan to replace them. Instead of 12V 0.4A motors, you should use motors rated at something like 3V 1.8A.

The best you can do with those motors is:

1. Wire the two Z motors in parallel and connect them both to ZA. Put the jumpers back in ZB.

2. Set the Z motor current to about 650 or 750mA and the other motor currents to 350mA. The actual motor current will be the value you requested rounded down to a multiple of 101mA.

HTH David]]> dc42 Duet Sat, 15 Oct 2016 03:06:34 -0400 https://reprap.org/forum/read.php?416,713763,714018#msg-714018 Re: Duet WiFi: Configuring Steppers on a Prusa-style (TMC 2660) https://reprap.org/forum/read.php?416,713763,714018#msg-714018
M350 X16 Y16 Z32 E32 I1 ; Set 16x microstepping

The "Z32" might need set to 16? Also, do your Z screws spin freely, as in not bound or too tight?]]> BuildAThing Duet Fri, 14 Oct 2016 23:31:23 -0400 https://reprap.org/forum/read.php?416,713763,714003#msg-714003 Re: Duet WiFi: Configuring Steppers on a Prusa-style (TMC 2660) https://reprap.org/forum/read.php?416,713763,714003#msg-714003 kenblu24 Duet Fri, 14 Oct 2016 19:56:33 -0400 https://reprap.org/forum/read.php?416,713763,713999#msg-713999 Re: Duet WiFi: Configuring Steppers on a Prusa-style (TMC 2660) https://reprap.org/forum/read.php?416,713763,713999#msg-713999 BuildAThing Duet Fri, 14 Oct 2016 18:57:35 -0400 https://reprap.org/forum/read.php?416,713763,713994#msg-713994 Re: Duet WiFi: Configuring Steppers on a Prusa-style (TMC 2660) https://reprap.org/forum/read.php?416,713763,713994#msg-713994
The motors seem to be about the same temperature now. I've checked each motor to make sure that the wires terminate correctly, and the windings don't seem to be shorting to each other if that's what you meant (sorry, not experienced with electronics at all) I made sure that there was nothing conductive under the duet, and nothing seems to be touching the connectors or wires. They're the same motor. Here's a YT video with the sound.

Multimeter is on the 200 setting.

Left motor connected to ZA via a 4-wire extension (about the length of the printer, which is 500mm wide). Measured from the end of the extension: Blue-Red reads 45.9; Green-Black reads 46.3
Measured directly from the motor wires, Blue-Read reads 38.4; Green-Black reads 38.6.

Right motor connected to ZB directly. No extension. Blue-Red reads 39.5; Green-Black reads 39.2]]> kenblu24 Duet Fri, 14 Oct 2016 18:19:52 -0400 https://reprap.org/forum/read.php?416,713763,713969#msg-713969 Re: Duet WiFi: Configuring Steppers on a Prusa-style (TMC 2660) https://reprap.org/forum/read.php?416,713763,713969#msg-713969
The percentage idle current can't be set per motor at present.]]> dc42 Duet Fri, 14 Oct 2016 16:13:25 -0400 https://reprap.org/forum/read.php?416,713763,713763#msg-713763 Duet WiFi: Configuring Steppers on a Prusa-style (TMC 2660) https://reprap.org/forum/read.php?416,713763,713763#msg-713763
The Z axis of all things is giving me the most problems. I've set the current for Z to 1200ma. It's an 8mm pitch leadscrew, holding about 500mm of V-slot Aluminum 2020, and about 300g of extruder. Shouldn't be too much for the motors to handle, right? However, the left motor, connected to ZA, is overheating while the one connected to ZB is only mildly hot. Also, when in motion, it's really easy for me to stop one of the motors with my hand, yet at idle (idle current set to 40%) it's about as powerful as I'd expect from a TI or Polulu driver. It's also ridiculously noisy both at standby and at in motion (though they were dead quiet with no load)

Z axis runs 400 steps/mm, max 900mm/min (15mm/s), other axis 53.3 steps/mm, max 9000 mm/min (150 mm/s)

Is there a way to change idle current per driver? The Y axis is really easy for me to move by hand at idle, but the Z axis is fine at idle.

Why is my Z axis so noisy, yet so weak when in motion? I thought stallguard was supposed to prevent that. Same for Y axis at idle.]]> kenblu24 Duet Thu, 13 Oct 2016 22:11:08 -0400