What might work for a delta might not work so much for a cartesian. Before I upgraded the stepper on my Z axis I think I was getting about 1/4 step holding accuracy. So for me compensation wasn't working all that great. So much better now with higher torque motor.
Posts made by InSanity
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RE: Firmware wishlist and priorities for Duet WiFi and Duet Ethernet
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RE: Firmware wishlist and priorities for Duet WiFi and Duet Ethernet
You'll not get 32x let alone 64x micro-stepping holding torque accuracy except for random rare cases of pure luck. You might get 16x if your lucky. Micro stepping works sure, but it doesn't replace good old mechanical resolution. I would say 1/8th stepping calculations might be a bit more realistic.
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RE: Microstepping advice
I'm running 1/128th on my Cartesian now without delays in the stepper queue showing up at up to 150 mm/s. 1/64th is a good choice overall. 1/32nd gets kind of noisy. In the end run whatever you want, personally I want better then 1/16th resolution even if that only translates into 1/18th due to limitations in the mechanics/motors, etc. I don't at all believe those who say you can't get better than say 1/8th. I don't believe it at all. I can just , just barely tell the different going from 1/16th to 1/32nd. It's subtle but it exists in my case on my printer with my room temperatures and humidity etc..etc. I think you get the idea.
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RE: 24V E3D v6 - PID Auto-Tuning
The resistance goes up when heated, so cold ohm readings are not always accurate. You have to measure current and multiply with the voltage while running to get the true watts. That being said however I've found the original E3D heaters to be pretty spot on while the clones can be way off. I have some 40 watt heaters (clones) that are 47 watts running or more.
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RE: Power Supply Question
No, 24V is fine for the steppers and will help maintain torque at high speeds. But your bed heater obviously needs 24V because of its high resistance. Also, unless you have 24V hot end heaters and fans, then you had better not feed more than 15V to VIN on the Duet. Even 15V is rather high for a 12V fan.
Personally I would buck that 15v down to 12v for the fans or better still just convert everything to 24v. Fan's are cheap as are heating elements.
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RE: Power Supply Question
That's a very high resistance for a bed heater. I suggest you run the bed from 24V and the Duet from 15V.
Interesting, so your suggesting running the steppers off 15v would be better then the 24v ? Just curious.
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RE: Which Slicer?
I'm still continuing my love hate relationship with S3D. I've tried the latest Cura beta and like it, need to try some others.
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RE: Firmware wishlist and priorities for Duet WiFi and Duet Ethernet
Let's not forget auto power off of ATX supply after cool down of hot end option. Priorities really are going to vary widely from user to user. #7 for example wouldn't gain me a thing, someone using a delta on the other hand might love it.
19, 3 ,6, 15, 20, 11, 12, 1
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RE: Firmware 1.18 provisional change list
Installed the new 1.2A motor for the Z-Axis up from the 450ma motor. Bed comp now works much more predictably. Running out of stuff that's original on the printer outside of the shell.
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RE: Blew up the E0 input on my new duetwifi
Haa, I was waiting for someone else to kill their processor, In my case I put 24v down the H3 pin. The chip still worked..somewhat but not right. I ended up ordering a new processor and removing the old one and drag soldering in a new one. Not something to do without experience and patience. My board has been rock solid with the replacement CPU.
Jeff
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RE: More secure power terminals
Wires ? Your not using Ferrules ? If not why not ?
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RE: Connection completely gone mid-print
Sounds like you have a leaky microwave oven. They use the same frequency range as the 2.4GHz wifi band.
It's one of the newer Inverter types, They all leak, just different degrees. But yes it's a bit more noisy then most. My issue is the failure mode going into access point mode. I see no reason why it should do that.
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RE: Connection completely gone mid-print
If I move my printer to the garage and the wife decides to heat up some veggies (or such) in the microwave I often loose the WiFi connection to the printer. Sometimes it'l even fall back to an access point state waiting for my neighbors to connect to it. Not good.
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RE: Firmware 1.18 provisional change list
Currently the current is reduced to the idle value only when no stepper motor has moved for the idle time.
Ok, so it's the firmware telling them to idle down and not the chips themselves ?
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RE: Want faster WiFi file transfer?
The problem I ran into is that I had to have the access point (1 of 7) sitting right next to the thing or it was terrible.
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RE: Want faster WiFi file transfer?
Are you using one of those FlashAir cards to upload files instead of the Duet WiFi web interface? I use to do that before I had the Duet Wifi, it sucked.
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RE: Firmware 1.18 provisional change list
Hey I have another perhaps stupid question. Is the idle down percentage applied via the stepper driver chip or is this the firmware applying the settings ? The reason I ask is if the Z-Axis driver wasn't receiving any step commands is it possible it would idle down if say it took over 30 seconds to get the next step command ?
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RE: Firmware 1.18 provisional change list
David, thanks for that. I also just ordered a new Z-Axis stepper and lead screw (one part) as I really think the 450 ma stepper is just not micro stepping at all well. It's the only remaining part of the printer. I've replaced all the electronics, motors, belts, shafts, rods, carriages, etc. Ohh and it would have been much cheaper to just buy a new printer..but not as much fun.
Edit: What I've noticed is sometimes the Z-Axis moves for bed comp as expected and sometimes it doesn't. I'll assume it's the motor.
Jeff
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RE: Firmware 1.18 provisional change list
Sorry for the post flood, is bed comp set by default to tapper off ? Doing a test print now with a piece of tape on the lead screw so I can see any movement. The first layer it was waving around, now it's doing nothing at all running the same span.
Thanks,
Jeff
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RE: Firmware 1.18 provisional change list
Right wrong or otherwise on my part I just had a heater fault with 1.18 trying to print some PETG. I had the first layer set to 240C without cooling and then 245 for the second layer with cooling. I got a heater fault pretty much the instant it tried to switch to layer two saying the temp wasn't rising the 0.3 deg C;/s that was expected. My logic was I wanted the print to stick on the first layer and then bond to itself on subsequent layers. Trying the same print with flat 240C which I'm sure will work.