Ormerod from RS

Ormerod from RS Hi All This is my first post on the forum, so ......Hello :-) I've just purchased an Ormerod from RS components. Number 003 of 500 no less! As no assembly instructions were supplied, I assume the only place to get the instructions is on Reprappro web site. I did find instructions there, but obviously the proof reader had taken a day off, as there are numerous omissions and design changes since these instruction were posted. So is there another website for assembly instructions for the current/RS model of Ormerod printer or is it a case of just emailing support at Reprappro? Thanks Rob https://reprap.org/forum/read.php?340,275446,275446#msg-275446 Wed, 15 Jul 2026 13:06:31 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?340,275446,359753#msg-359753 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,359753#msg-359753
RRP's solution is to increase the value of the series resistor, so that less ADC accuracy is needed at the bottom of the temperature range.]]> dc42 Ormerod Sat, 24 May 2014 06:43:35 -0400 https://reprap.org/forum/read.php?340,275446,359734#msg-359734 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,359734#msg-359734
The pdf note in link above suggests to use 0.1 %resistors to set the calibration points at 20% and 80% of the supply, but I am wondering whether it may not be possible to use the hot end board PWM to set the calibration points which anyway is trying to simulate a DAC ( if I understand how it works correctly)

As always apolgies for talking about it rather than doing it!

regards
Andy]]> kwikius Ormerod Sat, 24 May 2014 05:39:15 -0400 https://reprap.org/forum/read.php?340,275446,358699#msg-358699 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,358699#msg-358699 dc42 Ormerod Wed, 21 May 2014 18:08:17 -0400 https://reprap.org/forum/read.php?340,275446,358680#msg-358680 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,358680#msg-358680
I believe the SAM3 outperforms the atmega series an order of magnitude in terms of sheer sampling speed , which was a major design goal I believe(See link below). Adjustable gain, differential inputs 1 usec per sample versus 65 usec for the atmega I think (200 kHz max clock * 13 ck cycles per sample AFAICS).

Some useful info on SAM3 calibration here

regards
Andy]]> kwikius Ormerod Wed, 21 May 2014 17:35:22 -0400 https://reprap.org/forum/read.php?340,275446,358265#msg-358265 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,358265#msg-358265 T3P3 Ormerod Wed, 21 May 2014 02:54:12 -0400 https://reprap.org/forum/read.php?340,275446,358051#msg-358051 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,358051#msg-358051

Quote
T3P3
Dc42, not sure that the ADC is worse - rather that the sense resistors we used to be a better fit at 160C + make it a worse fit at 16C.

TPT3, the ADC in the SAM3X is worse, at least in the typical case.

For the atmega range, the datasheets quote the gain and offset errors as typically 2 LSB. For the SAM3X8E, the gain error min/typ/max are -64, -23 and +12LSB. The offset error min/typ/max are -30, +11.5 and +56LSB. So allowing for the fact that the SAM3X8E ADC is 12-bit and the atmega ADC is 10-bit, the typical gain error of the SAM is 3 times worse than the atmega and the typical offset error is 1.5 times worse. The worst-case errors of the SM3X8E are appalling.

You would probably have got away with using 1K resistors with the atmega processors.]]> dc42 Ormerod Tue, 20 May 2014 14:35:49 -0400 https://reprap.org/forum/read.php?340,275446,358018#msg-358018 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,358018#msg-358018 T3P3 Ormerod Tue, 20 May 2014 13:34:02 -0400 https://reprap.org/forum/read.php?340,275446,357749#msg-357749 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,357749#msg-357749
the ATC fan was working so i undid the 12V wires and re crimped and soldered them. fan working again! :)]]> barkerboy Ormerod Tue, 20 May 2014 05:41:07 -0400 https://reprap.org/forum/read.php?340,275446,357734#msg-357734 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,357734#msg-357734
1. ATX PSU has failed. Is the fan on the ATX PSU turning?

2. Bad connection to the wire that carries 12V from the ATX board to the Duet, because one of the screw terminals has come loose. These terminals need to be re-tightened regularly, especially if you tinned the wires instead of crimping the ferrules on.]]> dc42 Ormerod Tue, 20 May 2014 05:04:24 -0400 https://reprap.org/forum/read.php?340,275446,357697#msg-357697 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,357697#msg-357697
I've just turned my ormerord on at the power source and the hot end fan didn't turn on. I've had it working before but now it seems to have stopped but I don't remember changing anything. has anyone else had a similar problem?]]> barkerboy Ormerod Tue, 20 May 2014 03:42:33 -0400 https://reprap.org/forum/read.php?340,275446,349024#msg-349024 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,349024#msg-349024 dc42 Ormerod Fri, 02 May 2014 06:49:27 -0400 https://reprap.org/forum/read.php?340,275446,348992#msg-348992 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,348992#msg-348992
It's still a small proportion that are far out of range. We test any that go out as warranty replacements, though. The boards are tested by the manufacturer, but I'm still not convinced how rigorous they are.

Ian
RepRapPro tech support]]> droftarts Ormerod Fri, 02 May 2014 05:57:42 -0400 https://reprap.org/forum/read.php?340,275446,348971#msg-348971 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,348971#msg-348971

Quote
droftarts
Regarding the readings you got; if the 100k resistor reads -2.4C when directly connected to the Duet, it generally means that the Duet needs to be replaced, which we'll do under warranty.

Great that you're offering him a warranty replacement board! In another thread I pointed out an alternative solution to another user having the same problem (AFAR he lives overseas and didn't want to wait for a new board):

1. Connect a fixed resistor in parallel with the thermistor to bring the readings closer to room temperature, Somewhere between 100K and 220K should do the trick.

2. Pretend that the added resistor is in parallel with the 1K series resistor, and work out the resistance of the parallel combination. This gives the effective series resistance.

3. Set that as the series resistance using the R parameter in the M305 command. Use the H parameter to trim out any remaining temperature offset.

Obviously this solution is most appropriate for those who are used to soldering and have or can easily get a selection of resistors.]]> dc42 Ormerod Fri, 02 May 2014 05:14:16 -0400 https://reprap.org/forum/read.php?340,275446,348962#msg-348962 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,348962#msg-348962
Regarding the readings you got; if the 100k resistor reads -2.4C when directly connected to the Duet, it generally means that the Duet needs to be replaced, which we'll do under warranty. The temperature sensing is affected by the Analogue to Digital Converter (ADC) in the Duet, which are quite variable at the limits of their capability. We regard a temperature of between 16C and 30C acceptable when a 100k resistor is plugged in; any lower than 16C, and the board will register -273C at ambient room temperatures of 10 to 15C. The temperature accuracy improves drastically as the temperature increases.

Poor connections will also cause higher resistance, so check your wiring first, and the connections in the hot end connector, as dc42 suggests. We'll replace anything that was supplied damaged under warranty, but this does need to be done by emailing us directly.

Ian
RepRapPro tech support]]> droftarts Ormerod Fri, 02 May 2014 04:54:37 -0400 https://reprap.org/forum/read.php?340,275446,348950#msg-348950 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,348950#msg-348950
If you do need a new cable then I am sure RRP will supply one free of charge.]]> dc42 Ormerod Fri, 02 May 2014 04:29:44 -0400 https://reprap.org/forum/read.php?340,275446,348924#msg-348924 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,348924#msg-348924
Sorry aboutthe long wait. I was under the impression that I would receive an email when you replied but I didn't and only just today came on to see if anything way here, turns out there had been for quite a while.

I went out and bought a 100k ohm resister which i placed in the circuit instead of the thermister. The circuit then was working (giving a reading of -2.4deg). Then I checked the resistance over the thermister, while it was completely disconnected from the circuit and it read 100k ohm

This lead me to think that it must have been a connection of the wires to te thermister so I resoldered the thermister into the circuit and it worked for 2 tries of the reseting and testing (M562 P1 followed by M105) procedure, but then it stopped working again.

Then I looked at the connections elsewhere and found that the female port going into the ciruit board was quite loose so i jiggled it abit and the thermister started working again.

I then unplugged the circuit from teh board and just placed the resister on the pegs and the readings were correct.

All this is leading me to believe that I may need a new lead going from the board to the suspended section (lead going from board to hot end fan, probe and thermister) Is it possible to buy just this lead and if so how much is it?

TLDR; can i buy a new lead from the board to the thermister?

Tom

PS I've now clicked the follow topic box]]> barkerboy Ormerod Fri, 02 May 2014 02:56:55 -0400 https://reprap.org/forum/read.php?340,275446,343954#msg-343954 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,343954#msg-343954
This is the easiest way to test the Duet is responding correctly; with the hot end heater off, disconnect the thermistor wires, and put a known-value resistor in place. The following resistor values should yield the following temperatures (if you get a temperature fault, because it is disconnected for more than 1 second, reset it with 'M562 P1') :
100k ohm = 25C
47k ohm = 42C
10k ohm = 84C
1k ohm = 173C
470 ohm = 212C
220 ohm = 261C
100 ohm = 321C

This will help diagnose if the fault is with the Duet, or with the thermistor wiring.

If the board is always reading -273, it's probably a board fault. Please email me on support at reprappro dot com with a description of the problem, your full name and address, your RS order number, and whether you have a kit with red or green plastic parts.

Ian
RepRapPro tech support]]> droftarts Ormerod Wed, 23 Apr 2014 08:55:32 -0400 https://reprap.org/forum/read.php?340,275446,343931#msg-343931 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,343931#msg-343931
Just a quick question as I'm struggling to get my thermistor in my hotend working (it keeps displaying -273).

I've connected it up correctly (as far as I can tell) and when I disconnect it from the control board and check the resistance of the thermistor circuit with my multimeter it returns a resistance of about 125-130 K-ohms, which seemed about right.

I then figured to test the control board I could set resistance to 0 and see if I got the highest reading I could. I then shorted out the two hot end thermistor pins and pronterface was still returning -273.

From what I've tested I'm thinking that the problem must be originating within the board or the software.

Any suggestions?

Sorry if this is abit all over the place, I'm at a complete loss.

Tom]]> barkerboy Ormerod Wed, 23 Apr 2014 08:11:59 -0400 https://reprap.org/forum/read.php?340,275446,331958#msg-331958 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,331958#msg-331958
Sorry for the missing parts. All the kits are packed by hand, and it's quite a complicated kit, so we do make mistakes occasionally. RS don't stock any spare parts, you need to get them from us. We don't have access to the RS customer database, so please email us on support at reprappro dot com with a description of the problem, your full name and address, your RS order number, and whether you have a kit with red or green plastic parts, and we'll send out the parts you need as soon as we can.

Ian
RepRapPro tech support]]> droftarts Ormerod Sat, 29 Mar 2014 20:34:02 -0400 https://reprap.org/forum/read.php?340,275446,331867#msg-331867 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,331867#msg-331867
One of the bags of parts was missing in my kit too. I emailed RepRapPro about it and they sent me the missing bag straight away.]]> dc42 Ormerod Sat, 29 Mar 2014 15:45:13 -0400 https://reprap.org/forum/read.php?340,275446,331858#msg-331858 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,331858#msg-331858
We got our Ormerod just this week, last night as we were attempting to assemble it, we hit a problem, it didn't come with any of the required wiring looms, as the instructions said it would. Is this a common problem, is it a radionics problem, or reprap???

thanks,
Ryan.]]> RyanVeitch Ormerod Sat, 29 Mar 2014 15:29:45 -0400 https://reprap.org/forum/read.php?340,275446,312731#msg-312731 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,312731#msg-312731 Ecko Ormerod Tue, 18 Feb 2014 17:18:47 -0500 https://reprap.org/forum/read.php?340,275446,283870#msg-283870 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,283870#msg-283870
See [forums.reprap.org] for some results.]]> Treth Ormerod Mon, 23 Dec 2013 13:59:12 -0500 https://reprap.org/forum/read.php?340,275446,283868#msg-283868 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,283868#msg-283868
During commissioning, I felt so much air coming from the fan that I was convinced I had it turning the wrong way round. It turns out that this fan (the Elma HDF4020L) will only run in one direction. If you wire it back to front, it just doesn't move, which surprised me a bit - it must have a brushless motor. I also confirmed, by removing the fan, that it is running in the right direction, what I feel is "just" backwash.

So: don't underestimate that backwash.]]> skebengaboy Ormerod Mon, 23 Dec 2013 13:55:03 -0500 https://reprap.org/forum/read.php?340,275446,281781#msg-281781 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,281781#msg-281781

Quote
Moigy
Hi Treth,

I had the same issues with the prints not sticking.
Found two causes -
1 - print head too high to start with. I now set by sliding a bit of paper under the print head, fine adjust in 0.1 steps, the paper should drag ever so slightly on the head.
2 - clean the Kapton tape after every print. I use paper tissue and RS solvent cleaner. Wipe dry after to ensure no residue.
Haven't had an issue since following these two points.

Thanks Moigy,
I now set the print head low, probably lower than you, I pinch a piece of paper and then reduce the gap by 0.1 step, so I might be a bit too close.
I also rebuilt my extruder to move the nozzle lower by inserting some washers between the thermal insulator and the aluminium mounting block. This has in effect raised the z-sensor 3D printed mounting block (it has worked for me, but may not be relevant for others!)

I am now using IPA solvent, but your solution looks more friendly so I'll look into the RS wipes, thanks for the tip.]]> Treth Ormerod Wed, 18 Dec 2013 16:19:38 -0500 https://reprap.org/forum/read.php?340,275446,281694#msg-281694 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,281694#msg-281694
I had the same issues with the prints not sticking.
Found two causes -
1 - print head too high to start with. I now set by sliding a bit of paper under the print head, fine adjust in 0.1 steps, the paper should drag ever so slightly on the head.
2 - clean the Kapton tape after every print. I use paper tissue and RS solvent cleaner. Wipe dry after to ensure no residue.
Haven't had an issue since following these two points.]]> Moigy Ormerod Wed, 18 Dec 2013 12:27:07 -0500 https://reprap.org/forum/read.php?340,275446,281533#msg-281533 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,281533#msg-281533 Ian arranged a visit for meto the local RepRappro factory to swap my Duet with the wrongly mounted resistors and he demonstrated the replacement board talks to Pronterface via Lan.

Thanks Ian.

I saw the factory at work..lovely packing ladies and Sally and many other workers and about 20 Mendels breeding or laying Ormerod eggs.
One self replicating machine is fascinating, seeing 20 trundling is scary. so I went home and reread Azimov's 1st law of robotics.

Anyway, family from Italy collected at Bristol airport so gobbling time. I hope to reassemble my Ormerod electrics soon and will report success as soon as!]]> pault Ormerod Wed, 18 Dec 2013 06:52:17 -0500 https://reprap.org/forum/read.php?340,275446,281235#msg-281235 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,281235#msg-281235
Just as an example and to help you visualise what to expect, I share my data over a 4.5mm range with my original build and also my current readings after adjusting the extrude nozzle to be lower in respect to the z-sensor face.
Hope this may help in understanding choosing the values for the G31 Z1.4 P687 command (but with your values!)
[attachment 23095 Zsensorreadings.JPG]]]> Treth Ormerod Tue, 17 Dec 2013 14:38:03 -0500 https://reprap.org/forum/read.php?340,275446,280676#msg-280676 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,280676#msg-280676

Quote
droftarts
You can use our Mendel Tricolour troubleshooting guide for many problems - it will form the basis of the Ormerod troubleshooting guide (which we're working on), as there will be a large crossover between the two. See specifically: [www.reprappro.com]

Ian
RepRapPro tech support

Thanks Ian this is a good guide.

I now have one successful print of a snowman (2d shape with thickness) which I assume looks like what it is supposed to!
Anyway it 'stuck' and printed, so on with more test printing tomorrow. I tried the orthogonal print supplied, but this would not remain stuck, so I need to investigate further.

Thanks again to everyone who helped me at various points.]]> Treth Ormerod Mon, 16 Dec 2013 15:16:23 -0500 https://reprap.org/forum/read.php?340,275446,280348#msg-280348 Re: Ormerod from RS https://reprap.org/forum/read.php?340,275446,280348#msg-280348
You can use our Mendel Tricolour troubleshooting guide for many problems - it will form the basis of the Ormerod troubleshooting guide (which we're working on), as there will be a large crossover between the two. See specifically: [www.reprappro.com]

Ian
RepRapPro tech support]]> droftarts Ormerod Sun, 15 Dec 2013 19:56:00 -0500