Re: Cherry Pi III Is Available August 06, 2015 05:03PM |
Registered: 8 years ago Posts: 3 |
Re: Cherry Pi III Is Available August 06, 2015 05:32PM |
Registered: 8 years ago Posts: 3 |
Re: Cherry Pi III Is Available August 06, 2015 06:27PM |
Registered: 10 years ago Posts: 14,672 |
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YDKJ
Hello David,
I used a 47k and 15k resistor as you suggested. Gives me 2,9V and works like a charm.
Thanks for your help.
BR,
Simon
Re: Cherry Pi III Is Available August 07, 2015 05:45PM |
Registered: 10 years ago Posts: 515 |
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pugzor
Ends up my filament was slipping. Fixed it up though. Had to shave a bit off some of the assembly because clamped down the bearing wasn't actually connecting with the top of the filament...
Anyway, now it's printing freaking AWESOMELY.
One question though; what retraction are people running? I think that's the only thing that's off for me now as my models are really messy when it jumps between areas.
Re: Cherry Pi III Is Available August 18, 2015 04:58AM |
Registered: 10 years ago Posts: 155 |
Re: Cherry Pi III Is Available August 18, 2015 05:19PM |
Registered: 10 years ago Posts: 515 |
Re: Cherry Pi III Is Available August 18, 2015 11:44PM |
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Re: Cherry Pi III Is Available August 19, 2015 08:02AM |
Registered: 10 years ago Posts: 155 |
Re: Cherry Pi III Is Available August 24, 2015 06:13AM |
Registered: 9 years ago Posts: 893 |
Re: Cherry Pi III Is Available August 24, 2015 07:19AM |
Registered: 10 years ago Posts: 515 |
Re: Cherry Pi III Is Available August 24, 2015 09:58AM |
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Re: Cherry Pi III Is Available August 24, 2015 12:33PM |
Registered: 10 years ago Posts: 14,672 |
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David J
What's happening at the moment is that when the effector moves to the front, the tension/stiffness in the umbilical cord is pulling on the hot-end platform and operating the limit switch. This means that I have to use greater spring tension on the Z-limit switch than I would like. With the IR sensor, I suspect that the umbilical was pulling the effector at the front of the bed and pushing when it was at the back, leading to false readings in the Y axis - and I was getting prints that were fat at the front and thin at the back, which matches my theory. The prints were fine in the X axis, with an even layer.
So, after that long-winded explanation, I would like to know how others have set up the bowden tube and wiring so that it doesn't influence the effector. I have another IR sensor board on the way, so I'd like to get this sorted!
Re: Cherry Pi III Is Available August 24, 2015 01:06PM |
Registered: 9 years ago Posts: 1,159 |
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dc42
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David J
What's happening at the moment is that when the effector moves to the front, the tension/stiffness in the umbilical cord is pulling on the hot-end platform and operating the limit switch. This means that I have to use greater spring tension on the Z-limit switch than I would like. With the IR sensor, I suspect that the umbilical was pulling the effector at the front of the bed and pushing when it was at the back, leading to false readings in the Y axis - and I was getting prints that were fat at the front and thin at the back, which matches my theory. The prints were fine in the X axis, with an even layer.
So, after that long-winded explanation, I would like to know how others have set up the bowden tube and wiring so that it doesn't influence the effector. I have another IR sensor board on the way, so I'd like to get this sorted!
I use spiral wrap too, but it is a thin clear polythene type and it doesn't seem to make the bowden tube too stiff. Even so, I may try leaving gaps between the turns to increase the flexibility. Now that I've switched to 24V electronics, I could use thinner wires for the heater, which should help with flexibility.
If you are using Duet electronics, you can now configure height error offsets at each of the bed probe points in the bed.g file, to compensate for effector tilt that you can't eliminate. The trigger height errors on my build due to effector tilt are as high as 0.3mm in some areas of the 300mm diameter bed. I still haven't worked out what is causing the tilt.
Re: Cherry Pi III Is Available August 24, 2015 01:22PM |
Registered: 9 years ago Posts: 893 |
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dc42
I still haven't worked out what is causing the tilt.
Re: Cherry Pi III Is Available August 24, 2015 03:25PM |
Registered: 10 years ago Posts: 14,672 |
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David J
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dc42
I still haven't worked out what is causing the tilt.
Perhaps you have the same problem, and haven't noticed?
(Only joking )
Re: Cherry Pi III Is Available August 24, 2015 05:01PM |
Registered: 9 years ago Posts: 893 |
Re: Cherry Pi III Is Available August 25, 2015 01:47AM |
Registered: 10 years ago Posts: 515 |
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David J
I found that braided stuff to be more trouble that it's worth! It frays at the ends as soon as you touch it, and it's impossible to make changes to the wiring later on. Oh - and I had the trouble I described earlier with the braided stuff... .
Re: Cherry Pi III Is Available August 25, 2015 01:57AM |
Registered: 9 years ago Posts: 164 |
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David J
I'm starting to pay attention to my Cherry Pi delta once more, with the aim of sorting the problems that bugged me previously.
The first one is to do with the 'umbilical cord' leading to the effector:
Originally I used one of dc42's IR sensors, but had problems with an uneven print. David had mentioned that having the sensor some way from the nozzle could lead to errors in some circumstances, so as an experiment I replaced it with a mechanical switch activated when the nozzle touched the print bed. This worked better - but, following some different problems with the mechanical switch, I don't think that there was anything wrong with the original IR sensor setup.
What's happening at the moment is that when the effector moves to the front, the tension/stiffness in the umbilical cord is pulling on the hot-end platform and operating the limit switch. This means that I have to use greater spring tension on the Z-limit switch than I would like. With the IR sensor, I suspect that the umbilical was pulling the effector at the front of the bed and pushing when it was at the back, leading to false readings in the Y axis - and I was getting prints that were fat at the front and thin at the back, which matches my theory. The prints were fine in the X axis, with an even layer.
So, after that long-winded explanation, I would like to know how others have set up the bowden tube and wiring so that it doesn't influence the effector. I have another IR sensor board on the way, so I'd like to get this sorted!
Re: Cherry Pi III Is Available August 25, 2015 12:20PM |
Registered: 8 years ago Posts: 150 |
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dougal1957
............
Think I may have an idea on that I have just measured the spacing of the rods on the Alloy effector and carriages the carriages are all 40mm wide but the effector is 39.6 mm any idea where you can get 0.2mm thick M3 washer's?
.............
Doug
Re: Cherry Pi III Is Available August 25, 2015 02:19PM |
Registered: 9 years ago Posts: 1,159 |
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SlowFoot
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dougal1957
............
Think I may have an idea on that I have just measured the spacing of the rods on the Alloy effector and carriages the carriages are all 40mm wide but the effector is 39.6 mm any idea where you can get 0.2mm thick M3 washer's?
.............
Doug
Paper usual works well for a shims if you can keep it away from nuts and bolts that rotate when you tighten them.
Re: Cherry Pi III Is Available August 26, 2015 07:02AM |
Registered: 8 years ago Posts: 4 |
Re: Cherry Pi III Is Available August 26, 2015 07:12AM |
Registered: 9 years ago Posts: 67 |
Re: Cherry Pi III Is Available August 26, 2015 07:49AM |
Registered: 8 years ago Posts: 4 |
Re: Cherry Pi III Is Available August 26, 2015 09:30AM |
Registered: 9 years ago Posts: 1,159 |
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Matt,Wheatley
Steve,
I purchased a E3D-v6 hotend recently for my Cherry Pi and in the documentation it suggests that you tighten the heater block after you have heated the head to stop leaks :-
"When the HotEnd is at tempereature, tighten the nozzle whilst holding the heater block with a spanner. This will tighten the nozzle against the HeatBreak and ensure that your HotEnd does not leak. You want to aim for 3Nm of torque on the hot nozzle - this is about as much pressure as you can apply with one finger on a small spanner. The nozzle does not need to be torqued down incredibly tightly to form a good seal, when at lower tempreatures the aluminium will contract and hold the Nozzle and HeatBreak together."
Before having an original E3D I had a clone and I am so happy I upgraded to the E3D.
Matt
Re: Cherry Pi III Is Available August 27, 2015 03:51AM |
Registered: 10 years ago Posts: 515 |
Re: Cherry Pi III Is Available August 28, 2015 06:57AM |
Registered: 10 years ago Posts: 155 |
Re: Cherry Pi III Is Available August 28, 2015 09:48AM |
Registered: 10 years ago Posts: 515 |
Re: Cherry Pi III Is Available September 02, 2015 03:50AM |
Registered: 8 years ago Posts: 4 |
Re: Cherry Pi III Is Available September 09, 2015 04:43PM |
Registered: 9 years ago Posts: 893 |
Re: Cherry Pi III Is Available September 09, 2015 06:42PM |
Registered: 10 years ago Posts: 92 |