Re: My CoreXYU Printer project August 11, 2017 03:53AM |
Registered: 6 years ago Posts: 86 |
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o_lampe
What's written on the 6-pin IC at the top left?
It might be a PIC controller, triggering the two bigger MOSFet chips at the bottom.
Ever tried to run the pump with 12V?
Re: My CoreXYU Printer project August 11, 2017 04:01PM |
Registered: 6 years ago Posts: 86 |
Re: My CoreXYU Printer project August 12, 2017 03:10AM |
Registered: 8 years ago Posts: 5,232 |
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lars.arvidson
...I have not tried to run it on anything other than 24V, what would you expect 12V would to? Run slower? I could give it a try.
Re: My CoreXYU Printer project August 12, 2017 10:01AM |
Registered: 6 years ago Posts: 86 |
Re: My CoreXYU Printer project August 13, 2017 02:57AM |
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Re: My CoreXYU Printer project August 13, 2017 03:07AM |
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Re: My CoreXYU Printer project August 13, 2017 05:31AM |
Registered: 6 years ago Posts: 86 |
Re: My CoreXYU Printer project August 13, 2017 06:39AM |
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Re: My CoreXYU Printer project August 13, 2017 01:31PM |
Registered: 10 years ago Posts: 14,672 |
Quote
lars.arvidson
Thanks guys! I do believe I managed to get it to react to PWM. I had to connect it directly to the duet. My guess is that the mosfet board can’t switch fast enough for higher frequencies.
I only had 0.25W resistors so could only use 5ohm without exceeding the limit (too much). There was not a big difference from 100% to 50% but when down to 10-5% there was a pretty big difference. Maybe it will work better with bigger resistor or a inductor.
Would this one work? I guess this have to low power rating?
I’m sorry to say my electronics skills are not the best…
Re: My CoreXYU Printer project August 15, 2017 06:05AM |
Registered: 6 years ago Posts: 86 |
Re: My CoreXYU Printer project August 15, 2017 04:10PM |
Registered: 6 years ago Posts: 86 |
Re: My CoreXYU Printer project August 19, 2017 05:23AM |
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Re: My CoreXYU Printer project August 19, 2017 05:53AM |
Registered: 11 years ago Posts: 364 |
Re: My CoreXYU Printer project August 19, 2017 07:43AM |
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Re: My CoreXYU Printer project August 19, 2017 10:41AM |
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Re: My CoreXYU Printer project August 19, 2017 11:20AM |
Registered: 6 years ago Posts: 86 |
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ekaggrat
See the bukito . It uses flat cables for cable management and is very neat. U can use multiple parallel lines for higher amps
Re: My CoreXYU Printer project August 19, 2017 11:41AM |
Registered: 6 years ago Posts: 86 |
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the_digital_dentist
I wouldn't put the fan on the same ground as the endstop and thermistor. Fans generate noise, the last thing you want on the thermistor input.
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dc42
The thermistor needs a separate ground, because on the Duet it connects to VSSA (analog ground) instead of normal ground. In theory the fan and probe could share a ground, but if that ground wire breaks then 24V will be fed to the probe via the fan, which isn't good. Also, using a common ground for the fan stops you switching the fan on and off, because the Duet switches the ground aside of the fan (like other electronics does).
You could use a common ground for the endstop switch and the BLTouch signal ground.
Re: My CoreXYU Printer project August 19, 2017 02:42PM |
Registered: 10 years ago Posts: 14,672 |
Re: My CoreXYU Printer project August 20, 2017 09:40AM |
Registered: 6 years ago Posts: 86 |
Re: My CoreXYU Printer project August 20, 2017 02:27PM |
Registered: 6 years ago Posts: 86 |
Re: My CoreXYU Printer project August 20, 2017 06:05PM |
Registered: 10 years ago Posts: 14,672 |
Quote
lars.arvidson
Printed a pretty big spiral vase [www.myminifactory.com] . Its about 380mm high. I intended to print it at 0.2mm layer height and 80mm/s but forgot that Cura spiral mode (not surprisingly) use outer wall speed which is defaulted to half of the print speed unless set explicitly so it printed at 40mm/s. Took a bit extra time to complete
Re: My CoreXYU Printer project August 21, 2017 01:01AM |
Registered: 6 years ago Posts: 86 |
Quote
dc42
Quote
lars.arvidson
Printed a pretty big spiral vase [www.myminifactory.com] . Its about 380mm high. I intended to print it at 0.2mm layer height and 80mm/s but forgot that Cura spiral mode (not surprisingly) use outer wall speed which is defaulted to half of the print speed unless set explicitly so it printed at 40mm/s. Took a bit extra time to complete
You could have turned the speed slider in DWC up to 200% to put it back up to 80mm/sec. But 80mm/sec is pushing the limits for good quality perimeters on most printers.
Re: My CoreXYU Printer project August 21, 2017 03:42PM |
Registered: 6 years ago Posts: 86 |
Re: My CoreXYU Printer project August 22, 2017 01:33PM |
Registered: 6 years ago Posts: 86 |
Re: My CoreXYU Printer project October 18, 2017 01:10PM |
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Re: My CoreXYU Printer project October 19, 2017 11:26AM |
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Re: My CoreXYU Printer project October 22, 2017 08:02AM |
Registered: 6 years ago Posts: 86 |
Quote
dc42
You already have quite a large capacitor in parallel (the big one in the picture). What you need is a resistor or even better an inductor between the Duet and the pump. Best would be an inductor of at least 100uH used with a high PWM frequency e.g. 50 or 100kHz. You must add a flyback diode if your Duet PCB is not the 1.02 revision. If you use a resistor, try a few tens of ohms.
Re: My CoreXYU Printer project October 22, 2017 08:43AM |
Registered: 6 years ago Posts: 86 |
Re: My CoreXYU Printer project October 22, 2017 11:20AM |
Registered: 11 years ago Posts: 5,780 |
Re: My CoreXYU Printer project October 22, 2017 11:55AM |
Registered: 10 years ago Posts: 14,672 |