Search found 453 matches

by dc42
Fri Oct 21, 2016 3:05 pm
Forum: Mods and Upgrades
Topic: Duet Wifi and Cyclops
Replies: 5
Views: 2236

Re: Duet Wifi and Cyclops

1. To choose which extruder to move, select the tool that uses that extruder, as you defined in the M563 command. Is the Cyclops capable of mixing, or just switching? If just switching, then you will probably be better off defining 2 separate tools, one using each extruder, but both using the same h...
by dc42
Wed Oct 05, 2016 3:47 pm
Forum: Duet
Topic: Duet WiFi details published and pre-order window open
Replies: 69
Views: 15742

Re: Duet WiFi details published and pre-order window open

Thanks, DerStig! For those who want a wired Ethernet connection, we have firmed up a plan to use a small daughter board in place of the ESP8266. Production Duet WiFi boards already have pads for the associated connector and holes for the mounting pillars. We probably won't have it in production unt...
by dc42
Wed Oct 05, 2016 2:56 pm
Forum: Duet
Topic: Duet WiFi details published and pre-order window open
Replies: 69
Views: 15742

Re: Duet WiFi details published and pre-order window open

Thanks, DerStig! For those who want a wired Ethernet connection, we have firmed up a plan to use a small daughter board in place of the ESP8266. Production Duet WiFi boards already have pads for the associated connector and holes for the mounting pillars. We probably won't have it in production unti...
by dc42
Wed Oct 05, 2016 2:47 pm
Forum: Mods and Upgrades
Topic: Duet Wifi and Cyclops
Replies: 5
Views: 2236

Re: Duet Wifi and Cyclops

See m for how to define a tool for a mixing hot end. You can use the M567 command to set the mix ratio and the M568 command to enable mixing. As has already been suggested, you can define several tools with different mix ratios if you wish. It's probably best to use firmware retraction, so that all ...
by dc42
Mon Oct 03, 2016 11:21 am
Forum: The Build Zone
Topic: Hotend for new printer which one?
Replies: 9
Views: 2019

Re: Hotend for new printer which one?

Both I and T3P3 have been considering making a PCB effector for delta printers using an accelerometer or strain gauge to detect nozzle contact. I have had an accelerometer module on my bench for a month but no time to try it out. If we do decide to make an accelerometer-based probe then we will incl...
by dc42
Sun Oct 02, 2016 7:47 am
Forum: The Build Zone
Topic: mhackney's Real V3 Build Thread
Replies: 165
Views: 42185

Re: mhackney's Real V3 Build Thread

Let me know how you find the accelerometer probe. I have misgivings about running I2C over such a long distance and in close proximity to heater and possibly extruder stepper wires, but if you find it works reliably and you like it, then we can look at adding support for it in RepRapFirmware.
by dc42
Sat Oct 01, 2016 3:11 am
Forum: General Tips 'N Tricks
Topic: Is PEI that good?
Replies: 11
Views: 3074

Re: Is PEI that good?

Just one thing to add to that. If you intend to use my differential IR sensor with PEI, then clean the underside of the PEI with isopropanol and a paper towel, spray several thin coats of matt black barbecue/stove paint on it, then bake it in an oven at 170C for a few hours to cure the paint. Then a...
by dc42
Tue Sep 27, 2016 3:09 am
Forum: The Lounge
Topic: Max output voltage of PSU?
Replies: 20
Views: 4683

Re: Max output voltage of PSU?

So, one of the side affects of doing this (which i expected) was that my led strips are burning out because of the higher voltage (and because i have them inside the heated enclosure)... are there better choices for LEDS? ones that maybe run at 15v? I know there are 24 strips, but i think the light...
by dc42
Mon Sep 26, 2016 12:58 pm
Forum: The Lounge
Topic: Max output voltage of PSU?
Replies: 20
Views: 4683

Re: Max output voltage of PSU?

The bed heater mosfet used on RAMBO according to the schematic at m is a PSMN7R0-60YS. This is a terrible choice, because it's not suited to a gate drive voltage as low as 5V. No sane electronics engineer would choose it. That's why it gets hot. How hot will depend on how lucky you are with the part...
by dc42
Thu Sep 22, 2016 2:05 am
Forum: Duet
Topic: Duet WiFi on Rostock Max update
Replies: 23
Views: 6106

Re: Duet WiFi on Rostock Max update

Can any of you tell me what probing speed the accelerometer-based probe needs?
by dc42
Tue Sep 20, 2016 12:07 pm
Forum: Troubleshooting
Topic: Dial-up Music (HELP)
Replies: 11
Views: 2507

Re: Dial-up Music (HELP)

Fotek does make a 25A DC-DC SSR so yours probably was genuine. However, I have never found a data sheet for so-called 40A or greater Fotek SSRs, so I suspect they are all fakes. The Fotek SSR-25DD does have a high voltage drop, so it is equally unsuitable. The Auber Instruments one that you list on ...
by dc42
Tue Sep 20, 2016 11:58 am
Forum: Duet
Topic: Duet WiFi on Rostock Max update
Replies: 23
Views: 6106

Re: Duet WiFi on Rostock Max update

Thanks, it might seem silly but those quick tips gave me the push to start reading Duet's wiki page, which is a bit overwhelming at first. I've Wantai motors (42BYGHW811P1), with a rated current of 2.5a and it looks like the DuetWifi production board can handle 2.5a. Can I do the upgrade using this...
by dc42
Tue Sep 20, 2016 11:45 am
Forum: Troubleshooting
Topic: Dial-up Music (HELP)
Replies: 11
Views: 2507

Re: Dial-up Music (HELP)

So-called Fotek DC-DC SSRs are mostly fakes. They have a about 2V voltage drop, which means that a substantial fraction of the power intended for the bed gets dissipated in the SSR. So the SSR gets very hot and will fail unless you cool it very well. Get a better SSR. See m for recommendations. Alth...
by dc42
Thu Sep 15, 2016 8:27 am
Forum: The Build Zone
Topic: Yet another Metal Max!
Replies: 33
Views: 8445

Re: Yet another Metal Max!

Sorry, homework got the better of me and I have not got the time to work on it. I did just realize I bought the wrong relays (I got the DC-AC ones, which won't work). Would something like this do the trick to isolate the heated bed from the duet? The IRF540 mosfet used on that board is ancient, dir...
by dc42
Fri Sep 09, 2016 3:25 am
Forum: General Tips 'N Tricks
Topic: Auto Calibration Requierments
Replies: 21
Views: 5017

Re: Auto Calibration Requierments

I don't know about the RAMBO in particular, but for most boards with both min and max endstop inputs, the usual place to connect a Z probe on a delta is the Z_MIN endstop input.
by dc42
Tue Sep 06, 2016 2:37 am
Forum: General Tips 'N Tricks
Topic: E3D-V6 hotend tip
Replies: 9
Views: 2752

Re: E3D-V6 hotend tip

You can switch over to the cartridge thermistor, or PT100 sensor, or thermocouple, by purchasing the new heater block.
by dc42
Thu Sep 01, 2016 5:38 pm
Forum: The Lounge
Topic: Color mixing ideas
Replies: 28
Views: 9294

Re: Color mixing ideas

I guess you don't realise that RepRapFirmware already supports mixing extruders - in fact color mixing in RRF pre-dates color mixing in Repetier by several months. So it's Repetier who introduced a second dialect, not us. Then, I hope they implemented it the same way you did. The last thing we need...
by dc42
Wed Aug 31, 2016 5:28 pm
Forum: Duet
Topic: Duet H calculation for bed.g
Replies: 5
Views: 2216

Re: Duet H calculation for bed.g

zeplin, can you tell me the principle on which this works? The usual reason for needing H corrections is because the effector is tilting as it moves, and there are so many geometrical build errors that cause effector tilt that l can't envisage a way of working it out from the height measurements.
by dc42
Wed Aug 31, 2016 4:57 pm
Forum: The Lounge
Topic: Color mixing ideas
Replies: 28
Views: 9294

Re: Color mixing ideas

What sort of modifications to RepRapFirmware do you think would be necessary? Perhaps anticipating colour mixing changes so that the new mix appears at the tip of the nozzle at the right time - or something else? I am very willing to improve RepRapFirmware to advance the state of 3D printing, as I ...
by dc42
Sun Aug 28, 2016 4:16 pm
Forum: The Lounge
Topic: Color mixing ideas
Replies: 28
Views: 9294

Re: Color mixing ideas

If you have the printer do all the mixing, you have to significantly modify the firmware, and you also have to add a bunch of heavy stuff (and wiring) to the printer. It would be possible to do this with a Duet if it had the expansion board. RepRapFirmware (which runs the Duet) would have to be hea...
by dc42
Sun Aug 28, 2016 4:03 pm
Forum: General Tips 'N Tricks
Topic: How-to: Set up a RasPi 3 with 800x480 touchscreen and Touch UI
Replies: 13
Views: 49028

Re: How-to: Set up a RasPi 3 with 800x480 touchscreen and Touch UI

Kudos to you for publishing such a detailed description of how to get this working! For anyone with Duet electronics, there is a much easier way to get a 800x480 touch UI working: * Buy a PanelDue display controller and a compatible 5 or 7 inch screen; * Connect it to the Duet. It just works. No nee...
by dc42
Fri Aug 26, 2016 2:58 am
Forum: The Lounge
Topic: Color mixing ideas
Replies: 28
Views: 9294

Re: Color mixing ideas

There are machines doing many colour printing using a Diamond hot end and Duet electronics. See this claimed 300 colour print m for an example. The main issue seems to be that the Diamond doesn't mix the filaments very well. If we could sort that out, then I think we would be most of the way there. ...
by dc42
Wed Aug 24, 2016 4:57 pm
Forum: The Build Zone
Topic: Yet another Metal Max!
Replies: 33
Views: 8445

Re: Yet another Metal Max!

How large will the bed be? The most practical way to heat a large fixed bed is to use an AC mains voltage silicone heater switched by a DC-AC SSR. Then you can drive everything else using a 24V 5A power supply. This is what I have in my Kossel. See my blog for more details and pics.
by dc42
Fri Aug 12, 2016 4:22 am
Forum: Troubleshooting
Topic: 30 degree area across z axis is too high
Replies: 9
Views: 1415

Re: 30 degree area across z axis is too high

Some suggestions: 1. From your photo it looks like the Bowden tube is going off in the direction where you have the problem. Is there any play in the joints? If so then the sideways force from the Bowden tube may be reversing in that area, taking up the play in the opposite direction, which causes t...
by dc42
Sat Aug 06, 2016 6:59 pm
Forum: Mods and Upgrades
Topic: Aluminium RMAX-sized heated bed
Replies: 2
Views: 1515

Re: Aluminium RMAX-sized heated bed

Shenzen Ali Brother Technology will make a silicone heating pad to your size, voltage and power specifications, with or without thermistor. I suggest you get one a little smaller than the bed plate to leave room for fixings near the edge. They sell through aliexpress.

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