So far so good...finally got my large volume printer up and running.
-Duet Control board
-4 independent z-axis screws
-THK style linear rails
-matched axis...all 7 use the same BLDC servo and actuator components
-Heated bed
-1m^3 total print volume
We still need some additional thermal controls before we can start the long prints.
Ha! Why do I have my M208 set to Z-780??
️
This would have saved my buns twice now.....I never even saw that.
X and Y are set correctly...go figure.
Been working on this beast sporadically for almost a year...should be printing this week finally. Mind the mess and dangling wires!
@ajlapp Looks like M42 is the correct direction
@dc42 <quote>defining a GPIO pin as a thermostatically-controlled fan</quote>
Any insight into how to define this? It's not clear to me. Thanks.
Thanks for the quick reply.
My thought was to bring in the Duet pin and a secondary pin and OR them into a master shutoff.
Is there currently a usable DIO or other physical signal that is trigger by a hot end or bend over temp?
I’m looking to add a secondary safety system to my printer that cuts main power if there is a thermal runaway.
I’d like to use the signals coming from the Duet as part of the system if they’re accessible.
Linear Rails
https://www.amazon.com/gp/aw/d/B06VVXT19J?psc=1&ref=ppx_pop_mob_b_asin_title
Ball Screw
https://www.amazon.com/gp/aw/d/B01LXZTNRY?psc=1&ref=ppx_pop_mob_b_asin_title
The frame is thick wall steel square tubing with a pad welded to one face. That face was machined flat with the bearing blocks mounts and other features all in one shot.
I’m using a E3D Volcan with a 1.2mm nozzle and 3mm PLA for now.
We had a project planned for this that has since dried up so for now we’ll just be using it as a general printer.
@JRDM I built all axis identical. Same screw, same bearing blocks, same rail and same motor.
This was partially out of economy of scale and simplicity.
I wanted to keep all the motor mounts/bearing blocks identical. These same machined blocks set the frame rails...everything is machined and pinned.
The beefy motors paid off in the end...the table weight really swelled as the build progressed. It was stiff enough to start and the stiffening structure got heavy on accident.
We eventually added counter-balance weights...you can see the strings and pulley assemblies at the corners.
Anyway, the table needs to be re-imagined to cut weight.
My only other regret was building it so tall. We wanted to fit the control cabinets underneath. But now it’s too tall to see the bed at the start of the print.
All of the linear motion components and servos were sourced from Amazon...approx. $800 per actuator.
So far so good...finally got my large volume printer up and running.
-Duet Control board
-4 independent z-axis screws
-THK style linear rails
-matched axis...all 7 use the same BLDC servo and actuator components
-Heated bed
-1m^3 total print volume
We still need some additional thermal controls before we can start the long prints.
Ha! Why do I have my M208 set to Z-780??
️
This would have saved my buns twice now.....I never even saw that.
X and Y are set correctly...go figure.
Been working on this beast sporadically for almost a year...should be printing this week finally. Mind the mess and dangling wires!
Is it possible to force the machine to not go beyond 0 on the z axis?
On a few occasions now we've crashed the bed into the nozzle and other equipment because the manual jog controls will allow the machine to go into the negative Z space.
Normally this isn't too big a deal but on our large volume machine the z-axis screws are very powerful and a lot of damage occurs.
Anyway, a soft z-stop would really help me out but I can't seem to find a setting for this.
Worst case we'll go to hard stops but that has its own issues.
Thanks.
Working! 24v and the thermistor line in config did the trick.