Things I have printed - and my tips for getting to this stage
Posted by dc42
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Things I have printed - and my tips for getting to this stage December 31, 2013 06:25PM |
Here is a picture of some things I printed with my Ormerod:
For those of you still struggling to get this far, here are my top tips:
1. Be patient. I believe the Ormerod is a sound design, however it seems to have been released before some of the teething troubles were ironed out. Ian has done a superb job of supporting us over the holiday period, and has been very willing to supply replacement parts where needed.
2. Don't attempt to build it without 2.0 and 2.5mm ball-ended hex drivers. It will take much longer if you use only allen keys.
3. When you get to mounting the hot end, watch out for the print head sagging down on the left hand side. Use the slot in the x-runner bearing mount to adjust it. I had to replace the 9mm bearing by a 10mm one to solve the problem completely.
4. The foldback clips are not a satisfactory way of holding the bed down because they get in the way. I didn't find Kapton tape satisfactory for this either. Buy a 59p photo frame from The Range or similar (see this thread) and use the clips from that instead. Or buy Swiss Clips e.g. here.
5. The quality of the 5V power rail is important. It is probably best to use the 5V derived from the 12V supply, unless you have one of the first ~220 board that needs to be returned to get this working. If you use USB power, don't connect the Ormerod to an unpowered hub.
6. I've made a few mods to the electronics, but the only one I would class as really important for my build was to change 2 resistor values on the sensor board. Without this change, the sensor is very sensitive to sunlight and bright incandescent light. So shield your Ormerod from the sun, and use only LED or fluorescent artificial light whenever doing the G31 code calibration, homing the Z axis, or running the automatic bed setting procedure. [EDIT: I also find the sensor give much more consistent readings if you use white PVC tape instead of the aluminium tape.]
7. Make sure you install the latest firmware, from the Duet branch of the github repository, not the master branch.
8. If you suspect any problems at all to do with the SD card supplied, ditch it and replace it with a better one.
9. Ethernet connectivity is rather hit-and-miss. For me, it works only when I connect the Ormerod direct to my laptop (with wired and wireless connections bridged), not when I connect it to my wired Ethernet switch. So try connecting it in different ways.
10. After copying the Ormerod slic3r settings across, change the Printer->Extruder 1->Retraction distance to 4 or 5mm. This was the main thing I had to do to avoid getting threads and blobs in my prints. [EDIT: reducing the extrusion multiplier to 0.95 also helped to get good prints in my case, but your mileage may vary.]
11. Clean the Kapton bed with isopropanol (some people use acetone) before each print.
Happy printing!
Edited 2 time(s). Last edit at 01/01/2014 11:11AM by dc42.
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].
For those of you still struggling to get this far, here are my top tips:
1. Be patient. I believe the Ormerod is a sound design, however it seems to have been released before some of the teething troubles were ironed out. Ian has done a superb job of supporting us over the holiday period, and has been very willing to supply replacement parts where needed.
2. Don't attempt to build it without 2.0 and 2.5mm ball-ended hex drivers. It will take much longer if you use only allen keys.
3. When you get to mounting the hot end, watch out for the print head sagging down on the left hand side. Use the slot in the x-runner bearing mount to adjust it. I had to replace the 9mm bearing by a 10mm one to solve the problem completely.
4. The foldback clips are not a satisfactory way of holding the bed down because they get in the way. I didn't find Kapton tape satisfactory for this either. Buy a 59p photo frame from The Range or similar (see this thread) and use the clips from that instead. Or buy Swiss Clips e.g. here.
5. The quality of the 5V power rail is important. It is probably best to use the 5V derived from the 12V supply, unless you have one of the first ~220 board that needs to be returned to get this working. If you use USB power, don't connect the Ormerod to an unpowered hub.
6. I've made a few mods to the electronics, but the only one I would class as really important for my build was to change 2 resistor values on the sensor board. Without this change, the sensor is very sensitive to sunlight and bright incandescent light. So shield your Ormerod from the sun, and use only LED or fluorescent artificial light whenever doing the G31 code calibration, homing the Z axis, or running the automatic bed setting procedure. [EDIT: I also find the sensor give much more consistent readings if you use white PVC tape instead of the aluminium tape.]
7. Make sure you install the latest firmware, from the Duet branch of the github repository, not the master branch.
8. If you suspect any problems at all to do with the SD card supplied, ditch it and replace it with a better one.
9. Ethernet connectivity is rather hit-and-miss. For me, it works only when I connect the Ormerod direct to my laptop (with wired and wireless connections bridged), not when I connect it to my wired Ethernet switch. So try connecting it in different ways.
10. After copying the Ormerod slic3r settings across, change the Printer->Extruder 1->Retraction distance to 4 or 5mm. This was the main thing I had to do to avoid getting threads and blobs in my prints. [EDIT: reducing the extrusion multiplier to 0.95 also helped to get good prints in my case, but your mileage may vary.]
11. Clean the Kapton bed with isopropanol (some people use acetone) before each print.
Happy printing!
Edited 2 time(s). Last edit at 01/01/2014 11:11AM by dc42.
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: Things I have printed - and my tips for getting to this stage January 01, 2014 08:21AM |
Great summary! hmm.. I now seem to be spending more time reading the forum than getting my Ormerod to print something. Therefore .. Inspired by this thread.. I am logging out to get on with it! 
regards
Andy
Ormerod #318
www.zoomworks.org - Free and Open Source Stuff
regards
Andy
Ormerod #318
www.zoomworks.org - Free and Open Source Stuff
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