Reminder for new owners: Better Z-probe/fan control/hot end illumination board July 27, 2014 03:59PM |
Registered: 10 years ago Posts: 14,672 |
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board July 27, 2014 04:52PM |
Registered: 10 years ago Posts: 780 |
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dc42
A few users are converting their machines to dual nozzle along the lines I have published at [miscsolutions.wordpress.com]. In support of this, I am developing a modification to my hot end board to allow it to monitor two thermistors instead of one, and cope with the extra noise on the second thermistor. I will publish details of this modification soon. However, if there is demand for a few of these then I will have a PCB made to avoid the need to hack the original board, and do a limited edition production run (probably 10 units) of them. Along with this limited edition hot end board I would supply an additional board for terminating the second hot end loom, thermistor and fan, with another LED to show the status of the second heater, and a connector to link the second thermistor to the first board. Let me know if you are interested. I should point out that if and when RepRapPro releases a workable design for a mixing extruder, the need to control a second heater and monitor a second thermistor will disappear.
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board July 27, 2014 06:49PM |
Registered: 10 years ago Posts: 14,672 |
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board July 28, 2014 11:38AM |
Registered: 10 years ago Posts: 665 |
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board July 28, 2014 01:18PM |
Registered: 10 years ago Posts: 14,672 |
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zombiepantslol
Well, I thought it would be easier to implement a fan RPM display, but at least here the fan tacho line is somehow interferred by the hot end PWM. When the heater is off, I get perfect readings, but whenever it's heating up, my RPM measurements vary quite dramatically. I usually get readings of 4.000 RPM with the fan running at 35%, but whenever I turn on my heater, the RPM display goes up to 11.000 RPM, although the fan is still running at 35%. Do you have any ideas, dc42?
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board July 28, 2014 05:17PM |
Registered: 10 years ago Posts: 665 |
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board July 28, 2014 06:05PM |
Registered: 10 years ago Posts: 14,672 |
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board July 31, 2014 08:38AM |
Registered: 10 years ago Posts: 665 |
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board July 31, 2014 09:25AM |
Registered: 10 years ago Posts: 14,672 |
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board July 31, 2014 12:21PM |
Registered: 10 years ago Posts: 665 |
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dc42
Am I right in thinking that you are connecting your capacitor between a pin you are using on the expansion connector and the ground pin on the same connector?
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dc42
With the capacitor connected, do you get the high RPM reading all the time, or only when the PWM heater is operating? If it is all the time, then you need to be careful with layout in that area, because the switching regulator uses an inductor with an open magnetic circuit, which induces significant voltages in any loops you have near to it.
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dc42
4.7nF sounds rather high to me, I was going to suggest a few hundred pF.
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board July 31, 2014 04:49PM |
Registered: 10 years ago Posts: 14,672 |
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board August 01, 2014 09:01AM |
Registered: 10 years ago Posts: 665 |
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board August 01, 2014 09:13AM |
Registered: 10 years ago Posts: 14,672 |
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board August 01, 2014 09:40AM |
Registered: 10 years ago Posts: 665 |
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board August 01, 2014 11:59AM |
Registered: 10 years ago Posts: 14,672 |
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board August 01, 2014 12:01PM |
Registered: 10 years ago Posts: 2,472 |
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board August 02, 2014 08:21AM |
Registered: 10 years ago Posts: 665 |
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dc42
You are very welcome to bring your Ormerod here and use my scope to look at the signal - I am only 30mins drive from Heathrow
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dmould
Maybe try connecting your capacitor between the pulse output and the fan's ground (negative) lead. You could also try connecting a pulldown resistor across that capacitor.
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board August 05, 2014 12:58PM |
Registered: 10 years ago Posts: 2,472 |
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zombiepantslol
Thanks Dave, I tried this as well and it doesn't work either. I didn't install a pulldown resistor though, because the tacho line pulls the signal to GND twice per revolution anyways.
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board March 07, 2015 08:14PM |
Registered: 9 years ago Posts: 10 |
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board March 08, 2015 05:32AM |
Registered: 10 years ago Posts: 14,672 |
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xozip_neutron
Hello DC42, Do you still a stock of this upgrade board? Im very interested with it. i have a lot of problems with leveling my bed. I cannot optimize the full working area of my printer.
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board March 08, 2015 05:46AM |
Registered: 9 years ago Posts: 1,159 |
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dc42
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xozip_neutron
Hello DC42, Do you still a stock of this upgrade board? Im very interested with it. i have a lot of problems with leveling my bed. I cannot optimize the full working area of my printer.
I am out of stock at the moment, however I have a waiting list and I will manufacture some more when I have a few more orders. Would you like me to add you to the list?
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board March 08, 2015 06:56AM |
Registered: 10 years ago Posts: 14,672 |
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dougal1957
do you have any physical drawing of them (So I can see if the Effector on my Cherry PI could be adapted to fit one) ?
Doug
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board March 08, 2015 09:03AM |
Registered: 9 years ago Posts: 1,159 |
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dc42
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dougal1957
do you have any physical drawing of them (So I can see if the Effector on my Cherry PI could be adapted to fit one) ?
Doug
I don't have any drawings, but you can find photos at [miscsolutions.wordpress.com]. If you are familiar with OpenScad, you can work out the dimensions of the board from the file here [github.com] that I use as a jig to hold the board when applying solder paste. The width of the board (excluding the nib at the bottom) is 28mm and the total height is 82mm.
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board March 08, 2015 10:54PM |
Registered: 9 years ago Posts: 10 |
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dc42
Quote
xozip_neutron
Hello DC42, Do you still a stock of this upgrade board? Im very interested with it. i have a lot of problems with leveling my bed. I cannot optimize the full working area of my printer.
I am out of stock at the moment, however I have a waiting list and I will manufacture some more when I have a few more orders. Would you like me to add you to the list?
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board March 09, 2015 07:17AM |
Registered: 9 years ago Posts: 62 |
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board March 09, 2015 08:13AM |
Registered: 10 years ago Posts: 14,672 |
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Don Recardo
HI Dave ( dc42 )
On your first post in this thread you show some pictures of your new Z probe ( which I have and works great thanks)
In the pictures you can see the the printed Parts for the heat sink duct, the fan duct, but there is another green printed piece
mounted over the blades of the fan. ( it looks like a green square box with fan blades )
What is this piece , what is it for , and can you give me a link to it so I can print one for my Ormerod 2 please
Cheers
Don
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board March 09, 2015 08:16AM |
Registered: 9 years ago Posts: 177 |
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Don Recardo
HI Dave ( dc42 )
On your first post in this thread you show some pictures of your new Z probe ( which I have and works great thanks)
In the pictures you can see the the printed Parts for the heat sink duct, the fan duct, but there is another green printed piece
mounted over the blades of the fan. ( it looks like a green square box with fan blades )
What is this piece , what is it for , and can you give me a link to it so I can print one for my Ormerod 2 please
Cheers
Don
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board March 09, 2015 08:23AM |
Registered: 10 years ago Posts: 14,672 |
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xozip_neutron
I don't have any idea on how it will improve the auto bed leveling and homing of my printer. I have read your blog but I'm still confused. Can you show us a video showing the printer in action with this upgrade?
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board March 09, 2015 08:35AM |
Registered: 9 years ago Posts: 191 |
Re: Reminder for new owners: Better Z-probe/fan control/hot end illumination board March 09, 2015 08:47AM |
Registered: 10 years ago Posts: 14,672 |