Re: Cherry Pi III Is Available April 22, 2015 10:58AM |
Registered: 9 years ago Posts: 68 |
Re: Cherry Pi III Is Available April 22, 2015 11:06AM |
Registered: 10 years ago Posts: 893 |
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dougal1957
David
Can strongly recommend the DUET dead easy to configure and DC42's Firmware is the Dogs Bollxxxx as they say (I Know I haven't got mine fully dialled in yet but will have soon convinced my Diag Rods are wrong and my frame isn't stable enough Bracing about to go on it as we speak)
Doug
Re: Cherry Pi III Is Available April 22, 2015 12:01PM |
Registered: 10 years ago Posts: 1,159 |
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David J
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dougal1957
David
Can strongly recommend the DUET dead easy to configure and DC42's Firmware is the Dogs Bollxxxx as they say (I Know I haven't got mine fully dialled in yet but will have soon convinced my Diag Rods are wrong and my frame isn't stable enough Bracing about to go on it as we speak)
Doug
I was waiting for DC42 to come up with that one - he's a keen evangelist - but you beat him to it!I think that board is going to be one of the front runners.
Another thing I didn't mention is that while the printer was running, the 'Simple LCD' was struggling to keep up with it - the screen was flickering on and off. The RAMPS is obviously on the ragged edge.
Re: Cherry Pi III Is Available April 23, 2015 10:53AM |
Registered: 10 years ago Posts: 893 |
Re: Cherry Pi III Is Available April 23, 2015 10:55AM |
Registered: 9 years ago Posts: 68 |
Re: Cherry Pi III Is Available April 23, 2015 11:18AM |
Registered: 10 years ago Posts: 893 |
Re: Cherry Pi III Is Available April 23, 2015 11:53AM |
Registered: 10 years ago Posts: 67 |
Re: Cherry Pi III Is Available April 23, 2015 01:35PM |
Registered: 10 years ago Posts: 893 |
Re: Cherry Pi III Is Available April 23, 2015 02:08PM |
Registered: 10 years ago Posts: 67 |
Re: Cherry Pi III Is Available April 23, 2015 02:08PM |
Registered: 10 years ago Posts: 1,159 |
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David J
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Matt,Wheatley
Could the X,Y,Z Carriages be to tight, are all the v-wheels moving nice and smooth?
I've adjusted the carriages so they don't rattle around, and no more... just snug. They move easily enough.
Re: Cherry Pi III Is Available April 23, 2015 03:38PM |
Registered: 11 years ago Posts: 14,685 |
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David J
Belts slipping - I checked the pulleys! (I've been caught like that with my Prusa)
Re: Cherry Pi III Is Available April 23, 2015 04:42PM |
Registered: 10 years ago Posts: 111 |
Re: Cherry Pi III Is Available April 23, 2015 04:45PM |
Registered: 10 years ago Posts: 893 |
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dc42
Unless the belt tension is way too low, I think it should be impossible for the belt to skip a tooth (I'm sure others will correct me if I am wrong). So it is more likely that the motors are missing steps. Some possible causes of this:
- Motor current is too low. If both the motors and the drivers are running cool, try increasing it.
- Inaccurate delta motion is causing the head to try to go too low, so that it is hitting the print. Assuming you are using a firmware that does delta segmentation (i.e. not RepRapFirmware), this would mean that your print speed divided by your configured delta segments/second is too high.
Re: Cherry Pi III Is Available April 23, 2015 05:10PM |
Registered: 9 years ago Posts: 76 |
Re: Cherry Pi III Is Available April 23, 2015 05:26PM |
Registered: 11 years ago Posts: 14,685 |
Re: Cherry Pi III Is Available April 23, 2015 05:28PM |
Registered: 10 years ago Posts: 893 |
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mikes3ds
Note you will have to put your drivers on it.
Re: Cherry Pi III Is Available April 23, 2015 05:34PM |
Registered: 10 years ago Posts: 893 |
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dc42
If you do go for the Duet (or Smoothie), be aware that it may not fit under the bed, because it is larger than Arduino/RAMPS. Also you will want to get at the Ethernet port and the SD card slot at the edge of the board. I mounted my Duet on the Z tower, see [miscsolutions.wordpress.com].
Re: Cherry Pi III Is Available April 23, 2015 05:43PM |
Registered: 9 years ago Posts: 76 |
Re: Cherry Pi III Is Available April 23, 2015 05:49PM |
Registered: 11 years ago Posts: 515 |
Re: Cherry Pi III Is Available April 24, 2015 04:58AM |
Registered: 10 years ago Posts: 893 |
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AndyCart
Hi David. I would be amazed if your belts were actually skipping teeth on your pulleys. I agree with DC42, it's much more likely that your stepper currents are too low. In terms of the position of the RAMPS, why not just turn it over? That way just tilting the machine over would allow any adjustments to be made and still leave the bed secured
Re: Cherry Pi III Is Available April 24, 2015 05:07AM |
Registered: 10 years ago Posts: 1,159 |
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David J
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AndyCart
Hi David. I would be amazed if your belts were actually skipping teeth on your pulleys. I agree with DC42, it's much more likely that your stepper currents are too low. In terms of the position of the RAMPS, why not just turn it over? That way just tilting the machine over would allow any adjustments to be made and still leave the bed secured
Hmm - I did set the drivers with a multimeter - maybe I need to try the 'tweak it and see' approach.
I plan to take the heatbed off today to make some changes, so I'll run the printer without filament and adjust the stepper drivers while it's running. I'll be a lot happier if I can get it to go through the whole print without a blip.
As for turning the board over - stop making these logical and sensible suggestions!
(and yes, it is a very logical and sensible idea...)
Thanks,
David
Re: Cherry Pi III Is Available April 24, 2015 05:17AM |
Registered: 10 years ago Posts: 893 |
Re: Cherry Pi III Is Available April 24, 2015 05:37AM |
Registered: 11 years ago Posts: 14,685 |
Re: Cherry Pi III Is Available April 24, 2015 06:01AM |
Registered: 10 years ago Posts: 893 |
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dc42
I presume you do have thermal insulation of some kind under the heated bed?
The heated bed kit for the Mini Kossel from T3P3 includes an electronics cooling fan to blow air over the Arduino/RAMPS. See the end of [docs.google.com].
Re: Cherry Pi III Is Available April 24, 2015 08:16AM |
Registered: 10 years ago Posts: 893 |
Re: Cherry Pi III Is Available April 24, 2015 09:46AM |
Registered: 11 years ago Posts: 14,685 |
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David J
It looks like the hot end nozzle is dragging on the print occasionally... but would that knock the effector out of register for all subsequent layers? This was something that DC42 suggested earlier.
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David J
I've re-checked my calibration using the 4 scripts, and my bit of paper drags very slightly at all points, so I don't think I'm far wrong in that respect (he says, hopefully).
Re: Cherry Pi III Is Available April 24, 2015 11:22AM |
Registered: 10 years ago Posts: 893 |
Re: Cherry Pi III Is Available April 24, 2015 05:37PM |
Registered: 11 years ago Posts: 515 |
Re: Cherry Pi III Is Available April 25, 2015 03:27AM |
Registered: 10 years ago Posts: 893 |
Re: Cherry Pi III Is Available April 25, 2015 04:19AM |
Registered: 11 years ago Posts: 14,685 |