Is there any news or blog on the Duet3
Martin1454 last edited by
@dc42 Have you considered to make an expansion board with diffrent stepper drivers like the TMC2130 so we can get stealth chop on the X/Y axis? I know the maestro have them, but would love to be able to use some with the duet
@dc42 so with steps and direction inputs the absolute position would not be known to duet? my thought towards absolute position encoder is that the printer will always know it position thus with a well build print no need for homing or mesh grid compensation between every prints.
deckingman last edited by
................... my thought towards absolute position encoder is that the printer will always know it position thus with a well build print no need for homing or mesh grid compensation between every prints.
Does an absolute position encoder retain the absolute position when power is disconnected? i.e when the printer is turned off? That's the only advantage that I can see because as long as you don't power off the motors at the end of every print, then the absolute position is retained. So it is currently only necessary to home when the printer is first turned on, not for every print. Likewise any mesh compensation (although a well build printer doesn't need it ).
To my best knowledge absolute encoder will know its position after power cycle, I think its due to absolute encoders are providing a unique position values.
The place that I work they have a machine that has absolute encoders in its servo motor. It does not require homing sequence at startups.
Are absolute encoders for linear position actually available, at affordable prices?
Mabover last edited by Mabover
@dc42 the CUI AMT20, AMT21 and AMT23 sentries of encoders offer absolute output in spi, rs485 or ssi respectively and support software zero position setting. They can be had for about 50USD from digikey.
They also have incremental encoders and commutation encoders for BLDC motors that don't already have commutation sensors, they set the commutation position relative to the motor pole position via software in a guide they provide.
JoergS5 last edited by JoergS5
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kuhnikuehnast last edited by
As the TCT starts today, is there any chance to get an info / Look about new products on the Roadmap? Would really like to come over, but from germany it is quiet far... 🙄
Phaedrux last edited by
@dc42 Yes they aren't cheap. I have been think about DRO for quit time similar to this.
I know the DROs aren't fast enough to keep up with the motion but it could be used a reference to pull the positions when requested, like during boot up. What do you think?