D3D v20.04.27 Data Collection - Revision history

Marcin: /* Visible Extruder Shaking */

2021-02-25T05:30:28Z

Visible Extruder Shaking

← Older revision		Revision as of 05:30, 25 February 2021
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	==Visible Extruder Shaking==		==Visible Extruder Shaking==
	At very low speeds of 10% of 50 mm/s, when the stepping sounds like clicks - you can see the extruder bounce very slightly, maybe 1/4-1/2 mm - just from the clicks. When speed increases, bouncing is due to inertia. I was thinking bouncing may be due to riding of nozzle on lower layers (0.4 mm layer height), but it looks more like inertial effects. Because when slowed down sufficiently, visible bouncing disappears except at accelerations (motion reversal or turning).		At very low speeds of 10% of 50 mm/s, when the stepping sounds like clicks - you can see the extruder bounce very slightly, maybe 1/4-1/2 mm - just from the clicks. When speed increases, bouncing is due to inertia. I was thinking bouncing may be due to riding of nozzle on lower layers (0.4 mm layer height), but it looks more like inertial effects. Because when slowed down sufficiently, visible bouncing disappears except at accelerations (motion reversal or turning).

			'''Suggestion''' - stiffen up the axis:. 1. Use harder rods. 2. Use larger rods - 10 mm. 3. Use smooth drivers on Y and x. 4. Move nozzle closer to body, so that the shaking is not amplified by the lever arm length of the nozzle. It seems we can move the nozzle in 1/2-3/4" closer to body. Easiest solution is probably 10 mm rods, or overkill all together to 1" rods.

	=Performance=		=Performance=

Marcin: /* Layer Shifting */

2021-02-25T05:23:12Z

Layer Shifting

← Older revision		Revision as of 05:23, 25 February 2021
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	=Layer Shifting=		=Layer Shifting=
			See pictures [https://photos.app.goo.gl/22MDYgEneTW4QRa39]. My theory is, the extruder rams into the base layers sufficiently to actually move the softer, bottom layers. Just the bottom is layer shifted, with little mass - meaning those layers can be soft and easier to move around.
			==Visible Extruder Shaking==
			At very low speeds of 10% of 50 mm/s, when the stepping sounds like clicks - you can see the extruder bounce very slightly, maybe 1/4-1/2 mm - just from the clicks. When speed increases, bouncing is due to inertia. I was thinking bouncing may be due to riding of nozzle on lower layers (0.4 mm layer height), but it looks more like inertial effects. Because when slowed down sufficiently, visible bouncing disappears except at accelerations (motion reversal or turning).

	=Performance=		=Performance=

Marcin: /* Performance */

2021-02-25T03:16:17Z

Performance

← Older revision		Revision as of 03:16, 25 February 2021
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			=Layer Shifting=

	=Performance=		=Performance=
	Note that on the extruder axis, the belt cylinder must be on the X motor side, or it may be difficult to access the belt clamp for tightening. If the belt clamp is not easy to access, the axis may end up being loose.		Note that on the extruder axis, the belt cylinder must be on the X motor side, or it may be difficult to access the belt clamp for tightening. If the belt clamp is not easy to access, the axis may end up being loose.

Marcin: /* Performance */

2021-02-23T18:08:48Z

Performance

← Older revision		Revision as of 18:08, 23 February 2021
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	'''Add a hole to the upper corner piece on motor side so that motor-mounting screw can be tightened when axis is on the machine.'''		'''Add a hole to the upper corner piece on motor side so that motor-mounting screw can be tightened when axis is on the machine.'''

			X axis idler clamp broke when tightened down. Make this part 100% infill.

	=Spool Holder=		=Spool Holder=

Marcin: /* Performance */

2021-02-23T18:02:25Z

Performance

← Older revision		Revision as of 18:02, 23 February 2021
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	It is not possible to tighten Y motor 3mm screws as Z motors are close, so would need a righ angle screwdriver.		It is not possible to tighten Y motor 3mm screws as Z motors are close, so would need a righ angle screwdriver.

			'''Add a hole to the upper corner piece on motor side so that motor-mounting screw can be tightened when axis is on the machine.'''

	=Spool Holder=		=Spool Holder=

Marcin: /* Performance */

2021-02-23T17:56:06Z

Performance

← Older revision		Revision as of 17:56, 23 February 2021
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	Note that on the extruder axis, the belt cylinder must be on the X motor side, or it may be difficult to access the belt clamp for tightening. If the belt clamp is not easy to access, the axis may end up being loose.		Note that on the extruder axis, the belt cylinder must be on the X motor side, or it may be difficult to access the belt clamp for tightening. If the belt clamp is not easy to access, the axis may end up being loose.

	Motors on both Y axes got somewhat loose. Could be from voltage being too high.		Motors on both Y axes got somewhat loose. Could be from voltage being too high and motor hot - but not really as I could srew one of them in by 2-3 turns..

	The loose X and Y motors could explain a gradual layer shifting over x and y as the print proceeds in z.		The loose X and Y motors could explain a gradual layer shifting over x and y as the print proceeds in z.

Marcin: /* Performance */

2021-02-23T17:52:13Z

Performance

← Older revision		Revision as of 17:52, 23 February 2021
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	The loose X and Y motors could explain a gradual layer shifting over x and y as the print proceeds in z.		The loose X and Y motors could explain a gradual layer shifting over x and y as the print proceeds in z.

			It is not possible to tighten Y motor 3mm screws as Z motors are close, so would need a righ angle screwdriver.

	=Spool Holder=		=Spool Holder=

Marcin: /* Spool Holder */

2021-02-23T17:48:03Z

Spool Holder

← Older revision		Revision as of 17:48, 23 February 2021
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			=Performance=
			Note that on the extruder axis, the belt cylinder must be on the X motor side, or it may be difficult to access the belt clamp for tightening. If the belt clamp is not easy to access, the axis may end up being loose.

			Motors on both Y axes got somewhat loose. Could be from voltage being too high.

			The loose X and Y motors could explain a gradual layer shifting over x and y as the print proceeds in z.

	=Spool Holder=		=Spool Holder=
	*Spool holder wears out holes of motor piece after 100 hours or so. Needs a dedicated spool holder.		*Spool holder wears out holes of motor piece after 100 hours or so. Needs a dedicated spool holder.

Marcin: /* Build */

2020-08-02T03:44:55Z

Build

← Older revision		Revision as of 03:44, 2 August 2020
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			=Spool Holder=
			*Spool holder wears out holes of motor piece after 100 hours or so. Needs a dedicated spool holder.

	=Build=		=Build=
	*For the bed, because bed holder carriage nut catchers are printed upside down, best way to smooth is using a longer bolt to suck in a nut to clear the excess plastic. Possibly a different production engineering (machine redesign or part redesign) can solve the dirty nut holes		*For the bed, because bed holder carriage nut catchers are printed upside down, best way to smooth is using a longer bolt to suck in a nut to clear the excess plastic. Possibly a different production engineering (machine redesign or part redesign) can solve the dirty nut holes

Marcin: /* Bed Rise */

2020-06-20T14:05:43Z

Bed Rise

← Older revision		Revision as of 14:05, 20 June 2020
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	=Bed Rise=		=Bed Rise=
	*There is slight difficulty of bed moving all way to top. It may be with the rod stiffness near the 3D printed pieces. Maybe raise the 3D printed motor piece higher?		*'''There is slight difficulty of bed moving all way to top.''' It may be with the rod stiffness near the 3D printed pieces. Maybe raise the 3D printed motor piece higher?
	*When resting bed on Z carriages, use all 4 rods, not 2 - otherwise there is excessive weight on 2 rods and they bend.		*When resting bed on Z carriages, use all 4 rods, not 2 - otherwise there is excessive weight on 2 rods and they bend.
	*'''Maybe the carriage piece needs to be modified so belt hole is on both sides - that way we have full control over motion direction for series motors.''' Large hole was found on one Z, peg was too small.		*'''Maybe the carriage piece needs to be modified so belt hole is on both sides - that way we have full control over motion direction for series motors.''' Large hole was found on one Z, peg was too small.