Search found 204 matches

by dc42
Fri Feb 17, 2017 6:08 pm
Forum: OTHER Electronics
Topic: Which controller will eventually replace RAMBo?
Replies: 12
Views: 733

Re: Which controller will eventually replace RAMBo?

Going back two posts, I just read this: Now more recently we've seen various ARM based solutions, with new control software, Smoothie, Duet, BB etc. But like all open software/hardware, it's going to evolve in the direction the authors are most interested in. Unlike commercial software, there aren't...
by dc42
Sat Feb 11, 2017 1:48 am
Forum: Rostock MAX v3
Topic: Duet w/Accelerometer Probe Warning
Replies: 1
Views: 91

Re: Duet w/Accelerometer Probe Warning

If the VSSA fuse failed then you had a short between one of the thermistor wires and something else. The most common cause is probably a combination of a short in the heater cartridge between the element and the casing (which puts 12V or 24V on the hot end metalwork) and a short between a hot end th...
by dc42
Thu Feb 09, 2017 2:25 am
Forum: Duet
Topic: Duet 0.8 tplink 702n config problems
Replies: 5
Views: 115

Re: Duet 0.8 tplink 702n config problems

I had a similar setup working some time ago using the wr720n nano router. I had to connect a laptop to it with an Ethernet cable to set it up. AFAIR I configured it in client mode with auto DHCP. I configured the Duet to use DHCP.
by dc42
Tue Feb 07, 2017 3:51 am
Forum: Rostock MAX v3
Topic: Yet another Duet-to-HE280 accelerometer probe adapter
Replies: 46
Views: 1522

Re: Yet another Duet-to-HE280 accelerometer probe adapter

There has been some work recently on piezo-based probes built into the hot end mounting. There are threads about this on the duet3d and reprap forums. I have co-designed (with T3P3) a PCB effector with the piezo built in, and we hope to have prototypes to test within a couple of weeks. The main chal...
by dc42
Mon Feb 06, 2017 12:40 pm
Forum: The Build Zone
Topic: Rostock Max V3 Build with minor mods
Replies: 60
Views: 1342

Re: Rostock Max V3 Build with minor mods

I got a few good prints, but my stock power supply that I'm back on has recently decided that it wants to try changing the voltage too. I had a print fail halfway through, it was still traveling the print path but displayed "DEF" on the temps and had given up trying to heat, so the extrud...
by dc42
Mon Feb 06, 2017 3:12 am
Forum: Duet
Topic: Duet setup - instructions in progress
Replies: 346
Views: 14118

Re: Duet setup - instructions in progress

That will be because the corners are outside the printable radius you declared in the B parameter of the M665 command.
by dc42
Sun Feb 05, 2017 4:50 pm
Forum: Rostock MAX v3
Topic: Yet another Duet-to-HE280 accelerometer probe adapter
Replies: 46
Views: 1522

Re: Yet another Duet-to-HE280 accelerometer probe adapter

Quick question if I could ask: I have a Rostock V2 with a Prometheus V2 mounted in the 713Maker effector and the accelerometer board on top running on 12V. I previously had everything running and then upgraded to the DuetWifi replacing the RAMBo in the base of the printer along with the Trinket. I ...
by dc42
Sat Feb 04, 2017 7:51 pm
Forum: Duet
Topic: Duet setup difficulties
Replies: 9
Views: 150

Re: Duet setup difficulties

See https://duet3d.com/wiki/Calibrating_a_delta_printer. There is a section at the end on manual calibration.
by dc42
Thu Feb 02, 2017 5:22 am
Forum: Duet
Topic: Duet Auto-Calibration results - More Data Needed!
Replies: 38
Views: 753

Re: Duet Auto-Calibration results - More Data Needed!

@DC42 could a function be added to the firmware to allow individual movement of each tower? Then we could fasten a dial indicator to the carriage and command it to move say 25mm then measure the actual movement to determine your actual steps per mm. Likewise, measuring each tower individually could...
by dc42
Tue Jan 31, 2017 2:44 pm
Forum: Duet
Topic: Duet Auto-Calibration results - More Data Needed!
Replies: 38
Views: 753

Re: Duet Auto-Calibration results - More Data Needed!

There's a simple test you can do to see whether it is just a steps/mm issue. After running 6-factor calibration, print 2 parallel lines gong from top to bottom of the bed, about half a bed width either side of the centre. Check them for straightness against a straight edge such as a metal ruler. The...
by dc42
Sun Jan 29, 2017 4:20 am
Forum: Troubleshooting
Topic: Max V2 & Duet auto-calibration deviation
Replies: 2
Views: 77

Re: Max V2 & Duet auto-calibration deviation

Have you measured the FSR trigger height at each probe point? You may need to use trigger height corrections in the bed.g file. See https://duet3d.com/wiki/Calibrating_a_d ... bed.g_file.
by dc42
Sun Jan 22, 2017 4:35 am
Forum: Duet
Topic: Duet setup - instructions in progress
Replies: 346
Views: 14118

Re: Duet setup - instructions in progress

How stable is the bed temperature? Does the bed heater LED show a steady flicker when the bed is up to temperature, or can you see it cycling?
by dc42
Wed Jan 18, 2017 4:57 pm
Forum: Duet
Topic: Manual Calibration
Replies: 6
Views: 152

Re: Manual Calibration

You can tell the firmware to allow movement be!ow Z=0 in a couple of ways. Either send e.g. M208 S1 Z-3 to tell to allow movement down to 3mm below where it thinks the bed is, or send M564 S0 to disable limit checking completely.
by dc42
Mon Jan 16, 2017 2:51 am
Forum: General Tips 'N Tricks
Topic: How-to: Quickly hand-tune your PID values
Replies: 15
Views: 505

Re: How-to: Quickly hand-tune your PID values

That's why in RepRapFirmware, we don't to conventional PID auto tuning. Instead we use auto tuning to develop a first-order-plus-dead=time model of the heater, and from that we calculate two sets of PID parameters. One is used when the setpoint is changed by a large amount. The other (more aggressi...
by dc42
Mon Jan 16, 2017 2:39 am
Forum: Mods and Upgrades
Topic: PT100 sensor for Duet WiFi
Replies: 7
Views: 110

Re: PT100 sensor for Duet WiFi

Probably a dumb question, but it just occurred to me: can the Duet wifi accommodate both a PT100 and a thermistor (e.g. from the bed)? I would think so. Yes. Each PT100 daughter board supports 2 sensors, but the thermistor inputs are still available. By default each heater uses the corresponding th...
by dc42
Sun Jan 15, 2017 4:31 am
Forum: Heated Bed How-To's
Topic: Faster Heated Bed
Replies: 120
Views: 13005

Re: Faster Heated Bed

IMO a 350W MeanWell PSU is more than adequate for a single extrusion machine. Your bed heater takes 132W at present, so about 180W when you turn the voltage up. If the hot end heater is 40W then it will rise to 54W at the higher voltage, so we're at 234W. The stepper motors, electronics and fans wil...
by dc42
Sat Jan 14, 2017 11:22 am
Forum: General Tips 'N Tricks
Topic: How-to: Quickly hand-tune your PID values
Replies: 15
Views: 505

Re: How-to: Quickly hand-tune your PID values

Another issue with standard PID is that the optimum parameters are different (very!) depending on whether your priority is to react quickly to changes in load, or to implement a large change in temperature without massive overshoot. For example, if the heater is at 20C and you command it to 200C, yo...
by dc42
Sat Jan 14, 2017 7:25 am
Forum: Duet
Topic: Please help us test RRF 1.17 and DWC 1.14 release candidates
Replies: 16
Views: 436

Re: Please help us test RRF 1.17 and DWC 1.14 release candidates

My best guess is that the FSR at that point was triggering really late for some reason.
by dc42
Sat Jan 14, 2017 5:12 am
Forum: Duet
Topic: Please help us test RRF 1.17 and DWC 1.14 release candidates
Replies: 16
Views: 436

Re: Please help us test RRF 1.17 and DWC 1.14 release candidates

Were you probing off the edge of the bed on that side?

What type of probe are you using? If it doesn't use the nozzle itself as the probe, did you enter the probe X and Y offsets from the nozzle in the G31 command in config.g?
by dc42
Sat Jan 14, 2017 5:08 am
Forum: Heated Bed How-To's
Topic: Faster Heated Bed
Replies: 120
Views: 13005

Re: Faster Heated Bed

Here's a question that keeps bothering me. Why is it "right" to put the SSR on the ground side of the circuit, and "wrong" to put it on the hot side? Isn't it safer to gate the hot side? I agree, I would put an SSR in the hot side of the bed circuit. BTW, I fired up the Onyx wit...
by dc42
Fri Jan 13, 2017 1:26 pm
Forum: Rostock MAX v3
Topic: Silencing The noise
Replies: 14
Views: 428

Re: Silencing The noise

Upgrading the electronics to Duet WiFi should greatly reduce the noise generated by the stepper motors - I expect some of the R3 owners who have done it already can confirm this. The fan noise will probably be the next thing to work on.
by dc42
Fri Jan 13, 2017 5:51 am
Forum: Development Topics
Topic: Archim v0.3b
Replies: 13
Views: 500

Re: Archim v0.3b

Getting back to the topic of the Archim v0.3b. I am biased of course as I am the co-designer of the Duet WiFi. But anyway, here is my take on the Archim 0.3b from an engineer's point of view. Good points: Lots of protection against mis-wiring (as on the RAMBO): - The thermistor and endstop inputs ar...
by dc42
Fri Jan 13, 2017 3:11 am
Forum: Development Topics
Topic: Archim v0.3b
Replies: 13
Views: 500

Re: Archim v0.3b

I've got a different i2c accelerometer and have got it working with high temps as well, but it's always off by just a smidge from what I want it to be--consistent but off. Can you switch microstepping modes on the fly with the duet-wifi? Yes. Currently you have to re-home the printer when you chang...
by dc42
Thu Jan 12, 2017 4:38 pm
Forum: Duet
Topic: Duet 0.6 Setup questions
Replies: 21
Views: 418

Re: Duet 0.6 Setup questions

PWM works by turning the heater fully on for part of the time, and fully off for the rest of the time. That's what the MOSFETs on Rambo and Duet do, for the hot end heaters and for the bed heater. It makes no difference whether you use a MOSFET or an SSR to do the switching, except that some types o...
by dc42
Thu Jan 12, 2017 6:21 am
Forum: Duet
Topic: Duet setup - instructions in progress
Replies: 346
Views: 14118

Re: Duet setup - instructions in progress

Finally had time to get some work done on calibration when i notice this strange behavior, at least to me. I have posted a link below to a YouTube video. While doing the paper grip test I noticed that it was difficult for me to get consistent results. Then I noticed that the friction/force on the p...

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