Head sagging again
Posted by dc42
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Re: Head sagging again January 06, 2014 04:22AM |
Registered: 10 years ago Posts: 14,672 |
Simon, my sensor readings are still good enough to use. The lower readings will increase the sensitivity to ambient light, but I now have the Ormerod in a room with LED lighting, and the sun hasn't shone for several days. But I may print your original design anyway and use a high infill factor this time.
And yes, I always leave the fan running until the extruder has cooled down.
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
And yes, I always leave the fan running until the extruder has cooled down.
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
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Re: Head sagging again January 06, 2014 06:48PM |
Registered: 10 years ago Posts: 41 |
Yet another replacement part.
Moves the nozzle down 1mm from the orig
Has no counter sink on the top (so works better with the socket head screws)
fan mount and top surface angled at 4 degrees up to compensate for the 'droop'
and give a little better clearance for the fans,
Chris
Moves the nozzle down 1mm from the orig
Has no counter sink on the top (so works better with the socket head screws)
fan mount and top surface angled at 4 degrees up to compensate for the 'droop'
and give a little better clearance for the fans,
Chris
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Re: Head sagging again January 07, 2014 06:55AM |
Registered: 10 years ago Posts: 66 |
I have just purchased solid 20mm PTFE round bar for amongst other things for making a new mount from Maizy Plastics South Africa. PTFE is amazing stuff but pricey. Some machining work and it should be sorted. I notice most of the print heads out there make extensive use of PTFE to prevent heat transfer. I am sure this will solve the problem period. I think PTFE should also make good slider bearings.
Dieter
Ormerod #257
Dieter
Ormerod #257
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Re: Head sagging again January 07, 2014 07:34AM |
Registered: 10 years ago Posts: 14,672 |
Interesting! I just found these PTFE offcuts, but unfortunately I don't have the equipment to do precise machining.
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
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Re: Head sagging again January 07, 2014 08:06AM |
Registered: 10 years ago Posts: 66 |
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Re: Head sagging again January 07, 2014 08:44AM |
Registered: 10 years ago Posts: 578 |
I milled a replacement for mine a couple of weeks ago from delrin which is much cheaper and stronger all round (ptfe is a little soft and subject to creep, and that part doesn't get very hot... mine actually melted because of some glitch that made the hotend smoke). I'll be printing out chriscain's part in ABS and trying it out (it's probably superior to my milling efforts!)
Ray
Ray
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