Choosing correct motor for Delta
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My immediate reaction is to stick with 0.9 motors. They literally, physically, have double the coil/magnet assemblies of a 1.8 motor. No amount of microstepping overcomes that for your stated goal of smoothness.
The question then becomes: Which motor 0.9 motor? I haven't done research in a couple of years and may not know of something new. When I built my large-ish custom delta, with Duet2, I chose these:
https://www.sparkfun.com/products/10846
They have been outstanding on my main "workhorse" printer. 600mm (24 inch) bed.
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https://duet3d.dozuki.com/Wiki/Choosing_and_connecting_stepper_motors
These motors pair quite nicely with the Duet 2. I use them on my CoreXY and I know several people are using them on deltas. They are often recommended for just that.
Electrical Specification Manufacturer Part Number: 17HM19-2004S1 Motor Type: Bipolar Stepper Step Angle: 0.9 deg Holding Torque: 46Ncm(65.1oz.in) Rated Current/phase: 2.0A Voltage: 2.9V Phase Resistance: 1.45ohms Inductance: 4.0mH ± 20%(1KHz) Physical Specification Frame Size: 42 x 42mm Body Length: 48mm Shaft Diameter: Φ5mm Shaft Length: 24mm D-cut Length: 24mm Number of Leads: 4 Lead Length: 500mm Weight: 370gFor microstepping on the 2660 it is best to use x16 with interpolation to x256 enabled. This reduces the overhead on the CPU and still has the advantage of x256 smoothness and quietness since the driver sends a full 256 step pulses to the motor.
Using higher native microstepping on all axis is likely to result in a high hiccup count and possibly missed steps or even complete lockup. And honestly there is no benefit to doing so, especially if you're already using 0.9 degree motors. The one case where it may benefit is ungeared extruders with a low steps per mm.
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I got significantly better layer stacking with my Delta with LDO steppers when i upgraded from OMC (same as ones linked above).
LDO datasheeet: https://cdn.shopify.com/s/files/1/0239/9287/files/LDO-42STH47-1684MAC_RevA_9f61050a-7275-4b98-a6c5-9f28bd0cb2b7.pdf?172
Filastruder carries them.
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@wesc That's cool. I've heard good things about LDO motors before.
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Hmmm.... you guys are going to talk me into an upgrade... hmmm....
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@wesc said in Choosing correct motor for Delta:
I got significantly better layer stacking with my Delta with LDO steppers when i upgraded from OMC (same as ones linked above).
LDO datasheeet: https://cdn.shopify.com/s/files/1/0239/9287/files/LDO-42STH47-1684MAC_RevA_9f61050a-7275-4b98-a6c5-9f28bd0cb2b7.pdf?172
Filastruder carries them.
The specs of that motor are almost identical to the E3d high torque motor: https://e3d-online.dozuki.com/Document/wiwQjVSQdCLQT44I/MT-1704HSM168RE.pdf
Are Motech and LDO the same?
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Are Motech and LDO the same?
Could very well be. or could be matched specs and China copying China. Motech and LDO are about 100km apart from each other in China.
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@Danal I use the same Motors on my Rostock max for years now and they've held up quite well for the abuse I did on them. I have looked for lower inductance / inertia 0.9 steppers with good torque but I haven't found one I'm confident will perform better for a decent price (I'm looking at you moons' industries...)
If you get a chance, test out my settings I scope tuned for the motors. Mine run 1500ma without getting hot and are as silent as I can expect of them.
https://forum.duet3d.com/topic/13028/my-tuned-tmc2660-settings/2
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@lord-binky I have moons motors. They’re an old design, same as stepperonline and don’t run any better.
Maybe try Lin engineering if you’re looking to spend $50 per motor. Same company, totally different level of support and design. Lin has been around for a long time so lots of used ones out there.
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@oarjjj If I'm going to spend that on a motor i would rather get a set of smart steppers