MK2-250 - Revision history

Davo: /* Description */

2021-03-15T14:17:30Z

Description

← Older revision		Revision as of 14:17, 15 March 2021
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	# Below the fitting, filament is routed into a PTFE guide tube, which leads the filament between two counter-rotating motor shafts, precisely spaced for flexible 1.75mm filament, giving precise positioning, advance and retract control; the guide tube continues to the top of the brass nozzle, and mates to it.		# Below the fitting, filament is routed into a PTFE guide tube, which leads the filament between two counter-rotating motor shafts, precisely spaced for flexible 1.75mm filament, giving precise positioning, advance and retract control; the guide tube continues to the top of the brass nozzle, and mates to it.
	# At the nozzle, heat is transferred to the filament, whereupon it is forced out through the brass nozzle. Nozzles are available in 1.0mm, 0.75mm, 0.50mm and 0.35mm sizes, as well as blanks, which you can open up to your own custom diameter.		# At the nozzle, heat is transferred to the filament, whereupon it is forced out through the brass nozzle. Nozzles are available in 1.0mm, 0.75mm, 0.50mm and 0.35mm sizes, as well as blanks, which you can open up to your own custom diameter.

			# MK2-250 heads take Hyrel proprietary nozzles; standard nozzles may work for a short time, but will eventually cause problems.

	== Loading the Head onto the Printer ==		== Loading the Head onto the Printer ==

Davo: /* Firmware */

2020-06-22T19:56:23Z

Firmware

← Older revision		Revision as of 19:56, 22 June 2020
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	== Firmware ==		== Firmware ==

	MK2-250 heads all use the firmware labeled "FILAMENTS_33A.hex" or "hothead.mk400.33A.hex" (these are actually the same file with different names).		With version 4 and later, all heads take the same firmware!

			With version 3 and earlier, MK2-250 heads all use the firmware labeled "FILAMENTS_33A.hex" or "hothead.mk400.33A.hex" (these are actually the same file with different names).

	== Maintenance ==		== Maintenance ==

Davo: /* Changing Nozzles */

2020-06-19T17:32:04Z

Changing Nozzles

← Older revision		Revision as of 17:32, 19 June 2020
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	# Use normal procedure for heating and loading filament.		# Use normal procedure for heating and loading filament.

	Please let me know if any of that is not clear. '''You really should not have to do this. If you replace our nozzle with some other nozzle, you may have issues, because ours is designed to mate with the guide tubing with no gap.'''		Please let me know if any of that is not clear.

			'''You really should not have to do this. If you replace our nozzle with some other nozzle, you may have issues, because ours is designed to mate with the guide tubing with no gap.'''

Davo: /* Changing Nozzles */

2020-06-19T17:31:52Z

Changing Nozzles

← Older revision		Revision as of 17:31, 19 June 2020
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	# Use normal procedure for heating and loading filament.		# Use normal procedure for heating and loading filament.

	Please let me know if any of that is not clear. You really should not have to do this. If you replace our nozzle with some other nozzle, you may have issues, because ours is designed to mate with the guide tubing with no gap.		Please let me know if any of that is not clear. '''You really should not have to do this. If you replace our nozzle with some other nozzle, you may have issues, because ours is designed to mate with the guide tubing with no gap.'''

Davo: /* Maintenance */

2020-06-19T17:31:35Z

Maintenance

← Older revision		Revision as of 17:31, 19 June 2020
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	Very little maintenance is required on this head. Use a wire brush or tweezers to remove any excess plastic on the nozzle. Flexible filaments do not erode as easily as more rigid filaments.		Very little maintenance is required on this head. Use a wire brush or tweezers to remove any excess plastic on the nozzle. Flexible filaments do not erode as easily as more rigid filaments.

			=== Changing Nozzles ===

			How to disassemble the nozzle from the MK1 head:

			# Carefully:
			# Heat to the printing temperature of the material loaded.
			# Move the manual lever to the left, retracting material until it is free of the hobbed shaft, then remove by hand.
			# Turn off heat to the head and remove it from the yoke.
			# With a 1/4" driver or wrench, remove the nozzle.
			#. Inspect the nozzle cavity for any stray material; if found, remove with tweezers, solvent, air pressure or other means.

			How to reassemble the nozzle on an MK1 head:

			# Carefully:
			# Ensure your MK1 has no filament loaded.
			# With a 1/4" driver or wrench, attach the nozzle.
			# Use normal procedure for heating and loading filament.

			Please let me know if any of that is not clear. You really should not have to do this. If you replace our nozzle with some other nozzle, you may have issues, because ours is designed to mate with the guide tubing with no gap.

Davo at 16:06, 25 February 2018

2018-02-25T16:06:22Z

← Older revision		Revision as of 16:06, 25 February 2018
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	# Straighten (if needed) the last few cm of the new filament, which should be routed through the guide tubing. Insert it down through the pneumatic fitting, into the PTFE guide tube, until it comes in contact with the motor shafts.		# Straighten (if needed) the last few cm of the new filament, which should be routed through the guide tubing. Insert it down through the pneumatic fitting, into the PTFE guide tube, until it comes in contact with the motor shafts.
	# Press the manual feed lever to the right, advancing the filament two to three cm.		# Press the manual feed lever to the right, advancing the filament two to three cm.
	# In repetrel, click the motor on at 500 (pulses per ~~minute~~) until the new filament advances to the melting zone and forces the old filament out. Advance about 30cm of filament, checking for smooth sides and uniform color.		# In repetrel, click the motor on at 500 (pulses per second) until the new filament advances to the melting zone and forces the old filament out. Advance about 30cm of filament, checking for smooth sides and uniform color.
	# Remove excess filament with tweezers. Seat the guide tubing. You are ready to go.		# Remove excess filament with tweezers. Seat the guide tubing. You are ready to go.

Davo at 15:04, 1 April 2017

2017-04-01T15:04:21Z

← Older revision		Revision as of 15:04, 1 April 2017
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	The MK2-250 is specially designed for flexible filaments, and works with flexible 1.75mm filaments which print at temperatures up to 250°C.		The MK2-250 is specially designed for flexible filaments, and works with flexible 1.75mm filaments which print at temperatures up to 250°C.

	* [[File:Yt.png]] [https://www.youtube.com/watch?v=SOGKeU3vLbs Video: Overview of the MK2-250 Print Head]

	[[File:MK2-250.png\|300px\|left\|MK2-250]]		[[File:MK2-250.png\|300px\|left\|MK2-250]]
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	*PlastInk_Rubber		*PlastInk_Rubber
	</div>		</div>

			== Videos ==

			# '''General MK Series Videos:'''
			## [[File:Yt.png]] [https://www.youtube.com/watch?v=Fg9omXlYR-Q MK Series Printing Tips]
			## [[File:Yt.png]] [https://www.youtube.com/watch?v=0Aj9WCabPgw Post Processing with a Heat Gun]
			## [[File:Yt.png]] [https://www.youtube.com/watch?v=Llas80vYFPc Loading and Unloading Filament in the MK Series head]

			# '''MK2-250''' Extruder for Flexible Filament Videos:
			## [[File:Yt.png]] [https://www.youtube.com/watch?v=SOGKeU3vLbs Overview]
			## [[File:Yt.png]] [https://www.youtube.com/watch?v=0dS3bC0BnRQ Loading and Printing]

	== Description ==		== Description ==

Davo at 19:35, 28 November 2016

2016-11-28T19:35:40Z

← Older revision		Revision as of 19:35, 28 November 2016
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	* [[File:Yt.png]] [https://www.youtube.com/watch?v=SOGKeU3vLbs Video: Overview of the MK2-250 Print Head]		* [[File:Yt.png]] [https://www.youtube.com/watch?v=SOGKeU3vLbs Video: Overview of the MK2-250 Print Head]

	[[File:MK2-250.png\|300px\|MK2-250]]		[[File:MK2-250.png\|300px\|left\|MK2-250]]

	This includes the following materials:		This includes the following materials:

	<div style="column-count:5;-moz-column-count:5;-webkit-column-count:5">		<div style="column-count:3;-moz-column-count:3;-webkit-column-count:3">
	*BendLay		*BendLay
	*Flex 45		*Flex 45

Davo at 19:29, 28 November 2016

2016-11-28T19:29:19Z

← Older revision		Revision as of 19:29, 28 November 2016
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	The MK2-250 is specially designed for flexible filaments, and works with flexible 1.75mm filaments which print at temperatures up to 250°C.		The MK2-250 is specially designed for flexible filaments, and works with flexible 1.75mm filaments which print at temperatures up to 250°C.

			* [[File:Yt.png]] [https://www.youtube.com/watch?v=SOGKeU3vLbs Video: Overview of the MK2-250 Print Head]

	[[File:MK2-250.png\|300px\|MK2-250]]		[[File:MK2-250.png\|300px\|MK2-250]]

Davo: /* Maintenance */

2016-10-04T20:17:48Z

Maintenance

← Older revision		Revision as of 20:17, 4 October 2016
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	== Maintenance ==		== Maintenance ==

	Very little maintenance is required on this head. Use a wire brush or tweezers to remove any excess plastic on the nozzle~~, and use a shop vac or air hose to suck or blow away any buildup of eroded filament in the feed chamber and/or on the hobs (teeth) of the motor shaft~~.		Very little maintenance is required on this head. Use a wire brush or tweezers to remove any excess plastic on the nozzle. Flexible filaments do not erode as easily as more rigid filaments.