First Build Hiwin slide CoreXY. Need help selecting electrical parts. Hi everyone! My name is Patrick and I have some questions, most of which will be asked in the next post..... I need to make some of the decisions NOW though so I can size my printer and order the parts that will take a long time. Things I need as soon as possible so I can get exact measurements and calculate frame and other part sizes: 1. Find Z axis stepper motor and order. Must be REALLY short but can be NEMA 23 to make up lost torque. Suggestions? 2. Must pick hot end and order. E3D-V6 or Prometheus V2 or ????? Suggestions? 3. Must find best cheap supplier for Hiwin MGN7C or similar rail & slides, and order. Suggestions? 4. Find and buy a good and cheap ball & screw with over 225mm travel. Suggestions? Already ordered / Already have: 1. 215x215mm Hotbed 2. 2020 extruded aluminum frame. 3. Drive Belt and 16 tooth pulley wheels. Decided items: 1. First trial build will use a 215mmX215mm hotbed because that is the most common and least expensive heated bed. Later version will have larger beds. 2. Basic frame is Misumi 2020 aluminum extrusion that I already have. 3. X and Y axis are going to be HIWIN or similar flat linear rails. Something like MGN7C size. 4. Z axis stepper motor needs to be SHORT to fit design. maybe NEMA 23 to compensate torque. 5. Z axis will be ball and screw actuated. I am going to reserve this post for future use to list chosen parts and link to pictures of build. Go ahead and read the next post for the question details!!... Thank you and good to be here!!! https://reprap.org/forum/read.php?397,498938,498938#msg-498938 Fri, 15 May 2026 09:39:41 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?397,498938,516194#msg-516194 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,516194#msg-516194
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patrickrio
Hey, could you maybe post a video of the sensor operating on a delta printer? Maybe one with your leveling start-up procedure in operation? It would give a good indication of functionality....

It's taken a while because I was upgrading my delta printer to a larger build size, but I have now done a video. It's at [youtu.be].]]> dc42 CoreXY Machines Mon, 01 Jun 2015 08:47:17 -0400 https://reprap.org/forum/read.php?397,498938,511648#msg-511648 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,511648#msg-511648
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veng1
What is the accuracy and repeatability of the mini IR sensor?

Accuracy has no meaning in this context, because the sensor does not output an absolute height. Reproducibility when probing the same spot is excellent, 0.05mm or better provided you are not probing too fast (when used with Duet electronics, the firmware slows down the Z speed as the sensor gets close to trigger height). Reproducibility across the bed depends on a number of factors:

1. Is the bed surface uniform? The sensor is slightly affected by bed surface. For example, switching from plain glass to Kapton tape on glass increases the trigger height by about 0.2mm, and switching from plain glass to BuildTak increases it further.

2. Does the head stay level as it travels? Any probe that does not use the head itself as the probe has to be offset from the head. So any tilt of the head or the bed as they travel will alter the relative height of the nozzle and the probe, leading to errors.

My delta is in pieces being upgraded, but when I put it back together, I'll take some measurements and publish them - and do a video, which some people have asked for.

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veng1
Have you compared it to a capacitive bed sensor?

The problem that I and others have found with capacitive sensing is that it is sensitive to changes in humidity and temperature. This is a problem, especially if you switch between ABS and PLA, because the Z probe is best used when the machine is at operating temperature.]]> dc42 CoreXY Machines Thu, 21 May 2015 03:41:41 -0400 https://reprap.org/forum/read.php?397,498938,511544#msg-511544 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,511544#msg-511544
Have you compared it to a capacitive bed sensor?]]> veng1 CoreXY Machines Wed, 20 May 2015 19:27:52 -0400 https://reprap.org/forum/read.php?397,498938,511521#msg-511521 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,511521#msg-511521 patrickrio CoreXY Machines Wed, 20 May 2015 17:56:52 -0400 https://reprap.org/forum/read.php?397,498938,511409#msg-511409 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,511409#msg-511409
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patrickrio
ok, good to know. I will still be interested in your mini sensor when you do the next run... and i think i have two others interested too.

I could order some more PCBs for the mini board now, but I'd really like some feedback from the existing owners, particularly about whether the size, mounting holes and connector need any improvement to fit a wide range of printers.]]> dc42 CoreXY Machines Wed, 20 May 2015 12:55:32 -0400 https://reprap.org/forum/read.php?397,498938,511381#msg-511381 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,511381#msg-511381 patrickrio CoreXY Machines Wed, 20 May 2015 11:56:46 -0400 https://reprap.org/forum/read.php?397,498938,511325#msg-511325 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,511325#msg-511325
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patrickrio
Hi Dc42.

I understand that you had your fingers on the infra red sensor on the Ormeron 2 also. That sensor turns out to be available now and can be shipped for $15 to New York. I ordered it. I may still order yours when you have it available too. How is yours different????

The standard sensor on the Ormerod 2 uses modulated IR to reduce the sensitivity to ambient IR, based on a mod I did to the unmodulated sensor that came with my Ormerod 1. However, it is still very sensitive to the bed surface, because it measures the amount of light reflected from the bed. On the Ormerod, it is normally used with squares of white paper or white tape at the corners of the bed to serve as targets.

The sensor I make uses two modulated beams of IR that give maximum reflection into the photo sensor at slightly different heights, and it looks for the two reflected beams to have equal amplitude. So it is completely insensitive to ambient IR unless there is so much that the sensor saturates, which only happens if strong sunlight being reflected directly into it. It is also only slightly sensitive to the bed surface. So it doesn't need special targets and works on almost any surface except a mirror, which means it can be used anywhere on the bed.]]> dc42 CoreXY Machines Wed, 20 May 2015 09:43:09 -0400 https://reprap.org/forum/read.php?397,498938,511284#msg-511284 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,511284#msg-511284
I understand that you had your fingers on the infra red sensor on the Ormeron 2 also. That sensor turns out to be available now and can be shipped for $15 to New York. I ordered it. I may still order yours when you have it available too. How is yours different????]]> patrickrio CoreXY Machines Wed, 20 May 2015 07:22:53 -0400 https://reprap.org/forum/read.php?397,498938,509833#msg-509833 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,509833#msg-509833 patrickrio CoreXY Machines Sun, 17 May 2015 00:58:12 -0400 https://reprap.org/forum/read.php?397,498938,509773#msg-509773 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,509773#msg-509773 dc42 CoreXY Machines Sat, 16 May 2015 18:26:01 -0400 https://reprap.org/forum/read.php?397,498938,509771#msg-509771 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,509771#msg-509771 patrickrio CoreXY Machines Sat, 16 May 2015 17:57:31 -0400 https://reprap.org/forum/read.php?397,498938,509765#msg-509765 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,509765#msg-509765
My standard proximity sensor board for the Ormerod with hot end fan control etc. weighs about 10g and measure about 28mm wide x 82mm high. The mini IR sensor board weights about 2g and measures 24mm wide x 19mm high. However, the initial batch of the mini board has now sold out. I will make some more if there is enough demand.]]> dc42 CoreXY Machines Sat, 16 May 2015 17:39:17 -0400 https://reprap.org/forum/read.php?397,498938,509728#msg-509728 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,509728#msg-509728
I am now getting serious about choosing a proximity sensor for bed leveling. You mentioned your existing product with added bells and whistles. What are the measurements of that board? How much does it weigh? how much does it cost?

Where are you on the miniature proximity sensing only board? when will that be done? what are its dimensions, how much will it weigh, how much will it cost?

Also, since I will have an aluminum heat spreader right below my3mm borosilicate glass, I may be able to use an inductive proximity sensor. What are the electronic specs required for the Duet Board? I am looking at a NPN NO 10-30v 6mm distance sensing unit. will that work?]]> patrickrio CoreXY Machines Sat, 16 May 2015 15:40:24 -0400 https://reprap.org/forum/read.php?397,498938,507227#msg-507227 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,507227#msg-507227 github.com] to my repo.]]> dc42 CoreXY Machines Sun, 10 May 2015 05:21:15 -0400 https://reprap.org/forum/read.php?397,498938,507131#msg-507131 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,507131#msg-507131 dc42 CoreXY Machines Sat, 09 May 2015 19:41:04 -0400 https://reprap.org/forum/read.php?397,498938,507118#msg-507118 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,507118#msg-507118
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patrickrio
OK, I have enough electronics here to do initial setup and testing. I have optical endstops connected to the duet, I have arduino IDE installed and am connected to the board. I have the fan, heated bed, and steppers. I have not updated firmware.

Is there an installation guide for initial setup for a corexy duet?

There is a list of resources here [reprap.org]. Here is a summary of what you need to do:

1. Download a binary of my firmware fork (the only one that currently supports CoreXY) from [github.com]. Follow the link to the latest version, then click on the Raw button to download it.

2. See the RepRapPro commissioning guide at [reprappro.com] for how to flash the firmware and copy the SD card files across. I suggest you start from the SD card files used for Ormerod 2. You will need to make a couple of changes for CoreXY:

(a) Add the M667 S1 command in config.g to select CoreXY mode. See [github.com]. I suggest you read the whole of that document, apart fro the section on delta printers.

(b) Change the homeall.g file so as not to attempt simultaneous X and Y homing.

I'll add a /sys-CoreXY folder to my repo to make this simpler in future.

3. Then follow the RepRapPro commissioning guide for general testing and commissioning.

4. The web interface I recommend is DuetWebControl, available at [github.com].

btw on a CoreXY machine, you can test the X and Y motors individually by sending G91 to select relative position, then G1 commands with the S2 parameter will move the motors individually, e.g. G1 X-10 S2 will move just the X motor back 10mm.

Once you have up-to-date firmware, you can also update SD card files via FTP.

HTH David]]> dc42 CoreXY Machines Sat, 09 May 2015 19:01:16 -0400 https://reprap.org/forum/read.php?397,498938,507094#msg-507094 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,507094#msg-507094 patrickrio CoreXY Machines Sat, 09 May 2015 17:24:12 -0400 https://reprap.org/forum/read.php?397,498938,507091#msg-507091 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,507091#msg-507091
Is there an installation guide for initial setup for a corexy duet?]]> patrickrio CoreXY Machines Sat, 09 May 2015 17:12:31 -0400 https://reprap.org/forum/read.php?397,498938,506805#msg-506805 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,506805#msg-506805
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dc42
Duet is specified as 35V absolute maximum, Smoothieboard is specified as 12 to 24V. I don't know about the others.

Smoothieboard was designed to handle 35V, but we recommend 24V max so that people are more gentle to the boards :)

We have some people using 32V with no problem though, but it's under their own responsibility in that case.]]> arthurwolf CoreXY Machines Fri, 08 May 2015 15:54:55 -0400 https://reprap.org/forum/read.php?397,498938,505174#msg-505174 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,505174#msg-505174
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patrickrio
If I go 24v, do I need to do something to supply the Duet 5v or 3.3v power????? or is that already on the Duet????

The Duet has an on-board 5V switching regulator (you need to install JP9 to enable it), and a 3.3V regulator that is fed from 5V. The boards supplied by Replikeo also come with a 5V linear regulator on a separate board, which is used on the Ormerod 2 instead of the switching regulator in order to help the kit meet CE requirements in respect of EMI. Either regulator can be used to supply the 5V. If you use the switching regulator, then I suggest you use a multimeter to check the 5V output, as it may be that Replikeo is not testing the switching regulator. If you use the linear regulator, then my guess is that it will need a heatsink if you use 24V input.]]> dc42 CoreXY Machines Tue, 05 May 2015 03:47:10 -0400 https://reprap.org/forum/read.php?397,498938,505095#msg-505095 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,505095#msg-505095
I now have a Duet control board, but nothing to control......]]> patrickrio CoreXY Machines Mon, 04 May 2015 21:19:40 -0400 https://reprap.org/forum/read.php?397,498938,502219#msg-502219 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,502219#msg-502219
Pics of the design are here:

[forums.reprap.org]]]> patrickrio CoreXY Machines Sun, 26 Apr 2015 19:26:40 -0400 https://reprap.org/forum/read.php?397,498938,502216#msg-502216 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,502216#msg-502216
Here in NYC, getting anyone to do anything for you besides telling you to f**k off costs more than it costs to order several perfectly sized Borosilicate glass beds from robotdigg.com

Since I am waiting for parts now anyway, the glass can take it's time to arrive right to my dooooooor....

Still trying to figure out my options for the proximity sensor for nozzle height. Your lightweight option looks good. What other options do I have?

What are the picture frame clips you were talking about for the hot bed????

What designs do you recommend for hot bed leveling???? automatic?

If I go 24v, do I need to do something to supply the Duet 5v or 3.3v power????? or is that already on the Duet????]]> patrickrio CoreXY Machines Sun, 26 Apr 2015 19:17:42 -0400 https://reprap.org/forum/read.php?397,498938,502179#msg-502179 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,502179#msg-502179
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patrickrio
So, Dc42, I started ordering parts for setting up the head bed with aluminum... and I found that my heat bed already has an aluminum build plate that works as a heat spreader. They say that you can build strait on the anodized aluminum. In yur experience does this work? Or should I still buy the borosilicate glass?

I recommend you print on glass. It will be flatter than your aluminium is likely to be. It's too easy to gouge the aluminium with the print head, or when using tools to remove a print. Another advantage of printing on glass is that you can have several print beds. When one print has finished, remove it from the aluminium, put it aside to cool, put another glass plate on the aluminium, and then you can start another print immediately.

I use ordinary float glass, not borosilicate. I got my local glass merchant to cut me several glass bed from 4mm float glass for a few pounds. With a good heat spreader underneath, it won't crack unless you subject to to thermal shock, such as by spilling cold water on it when it is at 110C.]]> dc42 CoreXY Machines Sun, 26 Apr 2015 17:07:44 -0400 https://reprap.org/forum/read.php?397,498938,502151#msg-502151 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,502151#msg-502151
what bed leveling construct should I use? I was thinking 3 point with 2 thumb screws, but is auto leveling an option??]]> patrickrio CoreXY Machines Sun, 26 Apr 2015 16:09:40 -0400 https://reprap.org/forum/read.php?397,498938,502123#msg-502123 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,502123#msg-502123 patrickrio CoreXY Machines Sun, 26 Apr 2015 15:22:18 -0400 https://reprap.org/forum/read.php?397,498938,502121#msg-502121 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,502121#msg-502121
Normal machine screws are designed to give you mechanical advantage with the use of long wrenches and power tools to permanently connect objects together. The thread is DESIGNED to have high static friction to affect permanent connection. As a result, it is actually very inefficient at transferring torque to linear motion.

Lead screw threads, in contrast, are designed to transfer torque to linear motion. The most efficient threads are square cut, but they are difficult to tool and also are not forgiving to wear on the screw or nut.

Trapezoidal and Acme screw patterns are actually much easier to cut, and they have the advantage of lasting a long time if you use an anti lash nut.

All of this is really overkill in our use though, My lead screw is capable of accuracies above .01mm with anti lash and the right stepper... and also capable of putting a few hundred pounds of force on an object. I am not sure of how well the stepper tech works in a 3d printer, but the mechanics of that screw are very sound.]]> patrickrio CoreXY Machines Sun, 26 Apr 2015 15:15:54 -0400 https://reprap.org/forum/read.php?397,498938,502116#msg-502116 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,502116#msg-502116
[www.helixlinear.com]]]> patrickrio CoreXY Machines Sun, 26 Apr 2015 14:59:24 -0400 https://reprap.org/forum/read.php?397,498938,501850#msg-501850 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,501850#msg-501850
[www.thingiverse.com]]]> patrickrio CoreXY Machines Sun, 26 Apr 2015 02:40:23 -0400 https://reprap.org/forum/read.php?397,498938,501840#msg-501840 Re: First Build Hiwin slide CoreXY. Need help selecting electrical parts. https://reprap.org/forum/read.php?397,498938,501840#msg-501840
Since I last said I was getting a somewhat underpowered stepper for my z axis, things have changed for the better. I found a NEMA 23 motor that has 62 oz inches and is only 30mm long. fits the space I have perfectly and has plenty of torque. It ended up costing me about 5 dollars more than the best price i could find on the standard Nema 17 48mm with 400mm lead screw.

Holding Torque:
4.4 kg.cm
Type:
Hybrid
Phase:
2
Current / Phase:
1.7A
Certification:
CE,ROHS
Step Angle(degrees):
1.8
Model Number:
Nema 23
SIZE:
57x57x30mm
Screw length:
400mm
diameter of axle:
Tr8*4]]> patrickrio CoreXY Machines Sun, 26 Apr 2015 01:39:39 -0400