Thingiverse
Vertex Delta K8800-EXA Enhanced Run-out Detection by ThyWhiteHawk
by Thingiverse
Last crawled date: 3 years, 3 months ago
Having had my Vertex Delta for only a few weeks and after having several false "run-out" alarms from the filament run-out detector I tried to find a solution. I wasn't happy with Velleman's answer to someone else with the same problem (i.e. if it stops working just unplug it and don't use it) - especially since I am using Velleman's own filament - So I decided, why not just fix it?! :-)
So I tweaked the extruder design (well the printer is open source after all), specifically the K8800-EXA part onto which the filament run-out detector attaches.
Basically what I found was that the friction of filament passing through the part was wearing flat surfaces in the steel pins which meant that hairline trigger of the micro-switch was not quite making it. Perhaps simply replacing these pins with tool steel (or even ceramic) may work, but that sounds too easy!
There are dedicated micro-switches with roller levers available which are more suited to this job.
The Vertex Delta (K8800) uses a Dongnan KW-10 micro-switch. The one that I picked as a roller lever replacement (which has the same external dimensions as the KW10) is Omron D2F-FL2 (note that the default part shown isn't the roller lever). The 3D model is available here. It can be bought from various places, but I bought it from RS.
I also extended the filament guide to fill the void in between it and the roller to prevent the filament falling off the roller.
So I tweaked the extruder design (well the printer is open source after all), specifically the K8800-EXA part onto which the filament run-out detector attaches.
Basically what I found was that the friction of filament passing through the part was wearing flat surfaces in the steel pins which meant that hairline trigger of the micro-switch was not quite making it. Perhaps simply replacing these pins with tool steel (or even ceramic) may work, but that sounds too easy!
There are dedicated micro-switches with roller levers available which are more suited to this job.
The Vertex Delta (K8800) uses a Dongnan KW-10 micro-switch. The one that I picked as a roller lever replacement (which has the same external dimensions as the KW10) is Omron D2F-FL2 (note that the default part shown isn't the roller lever). The 3D model is available here. It can be bought from various places, but I bought it from RS.
I also extended the filament guide to fill the void in between it and the roller to prevent the filament falling off the roller.
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