Upgrading Mini Kossel to Duet electronics January 05, 2015 11:01AM |
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Re: Upgrading Mini Kossel to Duet electronics January 05, 2015 11:53AM |
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Re: Upgrading Mini Kossel to Duet electronics January 05, 2015 01:05PM |
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Re: Upgrading Mini Kossel to Duet electronics January 05, 2015 01:28PM |
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dc42
Hi Les, the Smoothie looks like a nice board and people seem to like it. The only problem I can see is that the web interface is rather primitive as far as I can tell from the documentation. But I expect someone will write a better one.
How much did you pay for your Smoothieboard? The European supplier appears to charge a fair bit more (Eur110+VAT for the 4XC) than RepRapPro charges for the Duet (GBP69+VAT).
Regarding your USB connector, if you have an early Duet then it may be that not all of the 4 mounting lugs on the USB connector were soldered to the board. See the image in my blog entry. If some were not soldered, then I think that is good grounds for a warranty claim.
I've just sorted out the correct M305 commands for the thermistors used in the Mini Kossel, and I am about to try motor movement and then homing.
Re: Upgrading Mini Kossel to Duet electronics January 05, 2015 01:43PM |
Registered: 10 years ago Posts: 327 |
Quote
dc42
Hi Les, the Smoothie looks like a nice board and people seem to like it. The only problem I can see is that the web interface is rather primitive as far as I can tell from the documentation. But I expect someone will write a better one.
How much did you pay for your Smoothieboard? The European supplier appears to charge a fair bit more (Eur110+VAT for the 4XC) than RepRapPro charges for the Duet (GBP69+VAT)..
Quote
dc42
Regarding your USB connector, if you have an early Duet then it may be that not all of the 4 mounting lugs on the USB connector were soldered to the board. See the image in my blog entry. If some were not soldered, then I think that is good grounds for a warranty claim.
Quote
dc42
I've just sorted out the correct M305 commands for the thermistors used in the Mini Kossel, and I am about to try motor movement and then homing.
Re: Upgrading Mini Kossel to Duet electronics January 05, 2015 03:37PM |
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Re: Upgrading Mini Kossel to Duet electronics January 05, 2015 04:00PM |
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Re: Upgrading Mini Kossel to Duet electronics January 05, 2015 04:16PM |
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dc42
Hi Doug, implementing CoreXY kinematics would be a piece of cake compared to Delta. The Duet+DueX4 can handle 5 extruders and hot ends, so it could handle a Kraken. I don't know how the cost would compare with the RADDS+extension+Arduino Due (btw does that give you Ethernet and control over the stepper motor currents?
Duet firmware already supports mixing extruders.
It occurs to me that Smoothieware could probably be ported to the Duet without difficulty, and vice versa.
Re: Upgrading Mini Kossel to Duet electronics January 05, 2015 06:34PM |
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paveldvor
David, this is great news, i was folowing you eagerly, i'm going to try to convert my delta tomorow in the evening. Hopefully i can comlete it soon.
Thank you for your great work, this is a great milestone for DUET electronics.
Pavel
Re: Upgrading Mini Kossel to Duet electronics January 06, 2015 02:32AM |
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dc42
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paveldvor
David, this is great news, i was folowing you eagerly, i'm going to try to convert my delta tomorow in the evening. Hopefully i can comlete it soon.
Thank you for your great work, this is a great milestone for DUET electronics.
Pavel
Thanks, Pavel! It's nice to know that someone else will be using this. I've checked in some more work into my delta branch so that the binary supports everything I've written about in my blog entry.
I'm not sure that mounting the Duet end-on was a good idea. I might re-mount it horizontally, so that the USB and Ethernet ports are not at the top. I'll add mounting holes for this option when I revise the enclosure model. The model also needs changing to add a cutout for the hot end terminal block, and to enlarge the cutout for the USB connector.
The heaters and thermistors are all working. The heated bed tends to overshoot the set temperature by several degrees. You might want to try enabling PID for the bed using the M304 command. I'll be too busy to try that for a while.
Individual motor moves are working, so is homing. I still have some more work to do on the firmware, so don't try any "normal" moves yet. This should be working within a few days; then there will just be the Z probe and bed levelling code to modify. I'll probably implement a N x N bed probe option that can be used on the Ormerod too. I'm also considering and auto-calibration function for delta printers, because it doesn't look difficult and could save a lot of time.
Re: Upgrading Mini Kossel to Duet electronics January 10, 2015 06:21PM |
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Re: Upgrading Mini Kossel to Duet electronics January 11, 2015 10:27AM |
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Re: Upgrading Mini Kossel to Duet electronics January 11, 2015 12:37PM |
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Re: Upgrading Mini Kossel to Duet electronics January 13, 2015 12:17PM |
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dc42
To use a thermocouple, you need to use a thermocouple amplifier chip. Like all the other printer electronics I am aware of, the Duet does not have one on board. The easiest solution (other than using a thermistor instead) would be to use one of the available thermocouple amplifier breakout boards. These come in two varieties: digital output (typically based on the MAX31855 chip, e.g. from Sparkfun), and analog output (typically based on the AD8495 chip, e.g. from Adafruit). Although the digital one would be more accurate, the analog one would be easiest to interface because the output could probably drive the Duet thermistor input directly (there is a chance that the 1K or 4.7K thermistor bias resistor on the Duet would upset the AD8495 output, but I doubt it).
Re: Upgrading Mini Kossel to Duet electronics January 13, 2015 01:15PM |
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Re: Upgrading Mini Kossel to Duet electronics January 13, 2015 01:57PM |
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dc42
I have a few single-nozzle sensors left, however I think they are too tall to fit on a Mini Kossel. Also the thermostatic control of the fan isn't really needed, because the fan on the MK is so quiet. However, once I have got the delta firmware fully working and sorted out a few other things, I intend to look into a couple of options for a better Z probe. One option would be a smaller version of the differential IR board, probably without the thermostatic fan control. Another would be a solenoid operated probe, which I considered for the Ormerod but didn't really fit (but it would fit on the MK).
Some people use FSRs under the bed mounts to detect contact from the print head. This appears to be a nice solution, however I have seen it said that this is not compatible with the heated bed option. Presumably this is because the FSRs need to be kept cool and/or because of the extra weight of the heated bed.
Re: Upgrading Mini Kossel to Duet electronics January 13, 2015 02:24PM |
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Re: Upgrading Mini Kossel to Duet electronics January 13, 2015 02:25PM |
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dougal1957
I am going to be using a E3D V6 and its fan is very quiet as well and I haven't yet needed a print cooling fan and that can be controlled from the duet anyway can't it?
Doug
Re: Upgrading Mini Kossel to Duet electronics January 13, 2015 02:35PM |
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Re: Upgrading Mini Kossel to Duet electronics January 13, 2015 02:42PM |
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Re: Upgrading Mini Kossel to Duet electronics January 21, 2015 06:45PM |
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Re: Upgrading Mini Kossel to Duet electronics January 22, 2015 01:44AM |
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Re: Upgrading Mini Kossel to Duet electronics January 22, 2015 07:29PM |
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Re: Upgrading Mini Kossel to Duet electronics January 22, 2015 07:48PM |
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Re: Upgrading Mini Kossel to Duet electronics January 23, 2015 04:22AM |
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Re: Upgrading Mini Kossel to Duet electronics January 23, 2015 06:57AM |
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Re: Upgrading Mini Kossel to Duet electronics January 23, 2015 07:10AM |
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Re: Upgrading Mini Kossel to Duet electronics January 23, 2015 02:23PM |
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Re: Upgrading Mini Kossel to Duet electronics January 24, 2015 05:59AM |
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