Help choose: Maestro vs WiFi

dc42

@briskspirit said in Help choose: Maestro vs WiFi:

@dc42 This is bad... ))))) Because I need to get a new board now!)
Could these new drivers be used with Duet 2 with some expansion board in future?

What new drivers?

briskspirit

@dc42 Those new on future Duet 3

I am leaning towards DuetWiFi now because of Duex5 support(Quad and MMU experiments are possible), convenient to work through WiFi(as I don't plan to buy PanelDue right now). But StelthChop2 attract me too..

dc42

There is an expansion board to add 2 more stepper drivers to the Maestro too.

briskspirit

@dc42 I am using 5 drivers right now (dual extruder setup) and MMU for example needs 3 more ...

Can I add two TMC2224 for X an Y on Duet 2 WiFi?

dc42

@briskspirit said in Help choose: Maestro vs WiFi:

@dc42 I am using 5 drivers right now (dual extruder setup) and MMU for example needs 3 more ...

Can I add two TMC2224 for X an Y on Duet 2 WiFi?

No, the Duet WiFi doesn't have the extra UART for driving TMC2224.

Maestro + expansion board gives you 7 stepper drivers, enough for a quad hot end. Also enough for MMU I would have thought.

briskspirit

@dc42 mmm, need to count again. I have 3 axis + 2 extruders right now. So I can add 2 more steppers(and MMU needs 3 as I saw?)

deckingman

@briskspirit For what it's worth, my big CoreXYUV sits in a spare bedroom, next to the one my wife and I sleep in. I have the Duet Ethernet plus Duex 5 expansion board and all 10 drivers are fully employed (5 extruders). My moving mass is around 4kgs in the Y direction, and around 2.4kgs in the X direction. I regularly print at 80mm/sec with non-print moves at up to 350mm/sec.

Despite this, with the bedroom door shut, it's barely audible - the loudest noise is from the hot end fan. I've done many many 24hr plus prints whereby the printer has had to run all night and it's never disturbed our sleep, even with just a thin stud and plasterboard wall between our bed and the printer.

So although stealth chop will make it quieter, 256x micro-stepping really isn't too bad. If it was my decision, stealth chop would be very low on my list of priorities.

Edit - unless you plan to have the printer in the same room that you sleep in

2nd Edit. I have two XY gantries - one carries the hot end, the second which sits above, carries the 5 extruders. So that's twice the number of motors running compared to most printers.

briskspirit

@deckingman Sold!)) Thank you! Ordering Duet WiFi right now

Now I am waiting for an aswer from Qidi regarding which thermo sensors I have there... (They should be Thermocouple K I think, but can’t be sure.. M4 threaded with 2 wires)

briskspirit

Should I switch to thermistor as they are cheaper and don't need expansion board? (Do not plan to go higher than 300C)

deckingman

@briskspirit said in Help choose: Maestro vs WiFi:

Should I switch to thermistor as they are cheaper and don't need expansion board? (Do not plan to go higher than 300C)

IMO, thermistors work fine. You print at the temperature which works best for you and which varies from filament to filament. So even if the thermistor was (say) 5 degrees off, and reads 200 when the true temperature is 195, it doesn't matter - you just print at 200. In reality, I swapped from some unreliable PT 100s (the wires kept breaking) to thermistors and didn't have to alter my print temperatures.

briskspirit

Any opinion about this PT100? https://www.ebay.com/itm/1m-Ultimaker2-PT100-Thermocouple-Control-Header-Thermistor-Sensor-for-3D-Printer/253239234320?hash=item3af63c0f10:g:zhYAAOSwk-1Z-omB

I saw recommendations about connecting 2 or 4 Wire PT100, but not about 3 Wire

Falkia

@briskspirit you can always use it as a 2 wire sensor, just leave the reference wire disconnected or just connect the two red wires together. Anyway it will only be accurate as a 2-wire sensor.

briskspirit

@falkia Thanks, understood

Need to make a decision:

1 - Now I have two Thermocouples K - $30 for expansion board
2 - Or switch to PT100 - $30 board + ~$20 sensors
3 - Switch to thermistors - less than $10 but need to change heater blocks

Dougal1957

@briskspirit or look into PT1000 sensors which are better than thermistors but not quite as good as PT100's but they don't need the daughter boards to function

briskspirit

@dougal1957 Why are they better?

Dougal1957

This post is deleted!

Dougal1957

@briskspirit the accuracy is better than a thermistor and they tend to have known response curves which are the same for most if not all of them you have no need to worry about B values or temp/resistance curves PT100's are flat response PT1000 are nearly flat certainly close enough to flat for us not to seriously worry about it. I have 100's on my delta but will probably use 1000's on my next CoreXY Build

briskspirit

@dougal1957 trying to find 3mm PT1000 on eBay and Amazon - zero...

Dougal1957

PT1000 sensor cartridges
You can also get the bare sensor for around 1.5-2$ each from places like RS in the UK and there most be places all round that have them get some 3mm od stainless tube and make your own

briskspirit

@dougal1957 So with so small difference in price between PT100 and PT1000 the point is to save some money on expansion board, right? Is it ok to use connectors with this type of sensor?