This topic contains 14 replies, has 6 voices, and was last updated by 
BHudson 7 months ago.
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Hi,
I’m have a problem getting started with my 3D printer a) no print head detected b)can’t remove material (NOT stuck in nozzle!).
Firstly it looks like automaker is not recognising the print head as I’m getting “Head: no print head” in status bar. When I try to print something there is no Make button..so I’m guessing this is to do with the no print head! I have added screen shot. Why is print head not being detected??
Secondly, I have the filament loaded I loaded as per instructions..to feed in until it is gripped ect. However now I cant remove it.I can see though the tube that it is not reaching as far as the nozzle. I have tried using the eject button in centre of the reel, it lights up and makes noise but the does not remove material. When I apply some force the filament is just stuck wont move in or out.
I have also tried using the eject stuck material and purge material..but as it hasn’t actually reached the nozzle using these doesn’t make a difference!
Can someone please let me know how to fix these two problems!? Thanks a mil!
If the material hadn’t reached the head that’s a good thing. Turn off the printer, unplug the USB and remove the head following the instructions in the manual. Try cleaning the contacts with Isopropyl alcohol and a cotton bud. Both sides (on the head and the carriage).
Re-attach the head and see if that fixes the problem. It’s happened to me before, so I just cleaned the contacts and put the head back and it never happened again.
@carolinemurphy it seems like you have the filament stuck in the Bowden tube. Sometimes it can swell due to moisture or heat and jam in the tube or tube fittings. I don’t leave PLA material in the Robox for more than a couple of hours. I have had too much trouble with it.
Check that your extruder loaded status reads True.
If so, you will need to partially disassemble the Robox to remove the filament. If you don’t feel comfortable doing so and possibly voiding your warranty, please contact CEL and open a ticket.
If you are brave, read on and remember I take no responsibility for any damage you cause to your unit. This is at your own risk.
1. Remove the power and USB cables from the Robox.
2. Clip the material where it enters the Robox and remove the spool.
3. Turn the Robox upside down and remove the one screw that holds the left side (black) cover locked. It should be a 1.5mm hex.
4. Turn the Robox right-side-up and, starting around the reel opening, pull the black side cover off the Robox.
5. With two small flat-blade screwdrivers, open the ZIF cable mount on the extruder and gently remove the ribbon cable.
6. Pull the extruder out of the Robox and unscrew the Bowden tube. This will allow you to pull the filament out of the Bowden tube. If you pull too hard, you may pull the Bowden tube out of its seat at the head carrier. That can be fixed but is a pain in the neck.
7. Once the filament comes clear of the Bowden tube, clip it off so there is about 2 inches exposed.
8. Replace the Bowden tube.
9. Re-install the extruder into the Robox and replace the ribbon cable. The ribbon cable must be seated fully and straight. It takes some time and effort to do so. Once the cable is seated, close the ZIF mount.
10. Replace the side panel on the Robox.
11. Reconnect power and attempt to eject the filament. If it ejects, pull it out of the Robox. If it doesn’t, turn off the Robox, disconnect power and remove the side panel again.
12. Remove the extruder as before.
13. Using a hobby knife, cut the filament at the joint between the extruder and the filament guide.
14. Using a hex driver, I think it is 2mm, remove the screws from the side of the extruder and the two spring-loaded screws from the bottom of the filament exit guide.
15. Remove the side of the extruder and pull the filament out. Check that the extruder is clear and that the filament exit sensor flap is not overly worn.
16. Reassemble the extruder.
17. Reassemble the Robox and replace the side panel locking screw.
I operate two Betas and one Production Robox.
See my 3D Hub site at https://www.3dhubs.com/phoenix/hubs/ben@bhudson I’ve used up three reels of ABS - one green and two white - but when I loaded the fourth reel and did a purge, I received a ‘filament slip’ report. Since it wouldn’t go any further I ejected the filament and removed the reel. Now I can’t load the filament as it won’t load automatically and only feeds in so far and then stops. I’ve upgraded AutoMaker to the latest version, used the disconnect filament recognition feature and run eject filament again - and also run eject stuck filament. Nothing appears apart from a tiny bead of filament at the nozzles - nothing very much though. I’ve been sent a new redesigned filament detection switch to fit. I’ve unscrewed the single switch under the left side panel - I’ve also unscrewed the two feet. Can I assume that you need to really prize the side panel off? It is certainly well held on and I don’t won’t to bend or dislodge anything unnecessarily. Once the screw is removed is the panel only held on by the two black pips?
@carolinemurphy I agree with David, take head off and put it pack in, to see if there is bad connection. Next check powercable and that flat cable. If you are unsure open ticket.
Eject probaply dont start becouse nozzles dont get hot enough becouse hed is not regonized.
Oh, if you unlock adwanced mode you can drive extruder back and foward to see if filament is really stuck or just dont eject coz of head.
@paulsroom Start removing the side panel at the top corner where the filament goes. There are two three tabs on the top of the panel and two on the bottom. Pull the panel straight out from the top right corner and it should pop out. I have yet to break one.
You should also check that you don’t have filament stuck in the Bowden tube or the entry port on the head. Sometimes strings of material crumple into the end of the Bowden tube and the entry port on the head. This will cause a slip error. The clue is when you eject the material. If it has not been melted, there is something keeping it out of the head.
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This reply was modified 7 months, 1 week ago by BHudson.
I operate two Betas and one Production Robox.
See my 3D Hub site at https://www.3dhubs.com/phoenix/hubs/ben@bhudson Thank you very much for your help. I have the cover off now - yes it wasn’t difficult - and I’m going through the investigation slowly, but steadily. I have now found the pictures, instructions and videos in the technical support section that I was looking for.
@bhudson I’ve dismantled the extruder section and found a rogue piece of filament that appears to have been melted - it’s flat - but not ejected. I conclude that the filament was ejected through this but stopped its reload back into the machine. At the moment I’m still refitting everything, which is going okay, except for the fact that I can’t see a screw hole just below the ZIF connector. I have the screw so I obviously took it out, I just can’t see where to put it back in.
@paulsroom There should be a total of eight screws on a blue Robox. There are two partially-threaded fine thread screws that have springs and washers on them. They go washer-spring-washer and then pass through the lower drive wheel arm and into the captive nuts below the filament exit.
There are 6 screws that have coarse threads. Five of these go on the side of the extruder to hold the top plate of the extruder on. All five of these screws are located on the same side of the extruder and the heads face the same direction.
The 6th screw is used to retain the extruder to the Robox frame and is threaded into the lower retaining slot. You will not be able to install this screw until you put the extruder back into the Robox and slide it into place. Then you should be able to see the screw hole. I can’t show you right now because my blue printer is running and I can’t get at the extruder.
I operate two Betas and one Production Robox.
See my 3D Hub site at https://www.3dhubs.com/phoenix/hubs/ben@bhudson Thanks, I found it. It was the fact that it is half in the extruder section (thus black) and half in the frame (blue) that threw me. Obviously I didn’t take note of the fact when unscrewing everything. I now have everything re-assembled and will be testing it all tomorrow. Everything was very clean and there were no other visible signs of any obstructions.
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This reply was modified 7 months, 1 week ago by
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