The next generation of TAZ printers
Thu, Aug 15
@kent there is a surface finish callout in the title block
I looked at the drawing and besides "clean, free of oil and debris" there is no surface finish requirement. In this case I don't see any grounds to reject them.
@zachah that looks great!
@zachah thank you! Will get this posted to the change order to get testing.
Wed, Aug 14
@DaniAO last time we got some from top plates from quattro that were kind of matte i believe they were sent back to be reworked. Mechanically all the tool head parts will be fine whether they are matte or have a shiny finish. I personally think they should be fine cosmetically also, but i dont think this is up to me. The back plate is not really visible when the tool head is fully assembled so i think these should be good to use
@MichaelM I also know this part is in progress for a change order as well. T7594. Will follow up on what is going on with the status of these.
Tue, Aug 13
I believe the last shipment came from Quattro, which have a less cosmetically appealing appearance than the ones we get from PMM. They should be fine functionally.
Mon, Aug 12
not sure if this is a bug worth mentioning, but I had one today where when I hit Auto Home, the whole screen went blank except for the Auto Home button up in the corner. It still Auto Homed correctly, and went back to normal afterwards, and retrying it I got the Please Wait screen.
So far, yes
Did pulling the slack out help though?
@west There was some slack, and all I did was move it over a bit. There's nothing to keep it from slacking back though
@paulette i dont think thats enough. if it is stripping the black coating off then it might be fine. The nozzle should look like shiny stainless steel for good conductivity
We've been cleaning the nozzles with alcohol prior to running auto cal. Do you think this isn't enough?
Yes, this is something I added. Before there was no feedback that the homing was taking place.
@robert unless this screen is causing issues getting the printer calibrated, you are good to move forward with them.
@DaniAO So we're good to go?
@tutley agreed.. I don't think this should stop production.
@DaniAO i know @marcio developed this when working on kangaroopaw firmware and added it into the TAZ Pro. It is definitely a bug that the screen isnt staying on please wait for the entire duration of the auto homing.
I personally dont think this should hold up production, but that's not really my call
@DaniAO Doesn't seem to be affecting anything. Thats as far as I got Thursday so if there's other issues I haven't seen them yet.
@robert yea definitely! I think we should try and scrub the black coating off the conical portion of the nozzle prior to running calibration. It comes off pretty easily with the green scotch brite pad. Steel wool may work as well. If we can get them from E3d pre cleaned that would be ideal, but it might be a little while until we get there
@cmerot If it wasn't clear this morning we're going to hold off an calibrating until this is said to be ok or something else.
@tutley Gotcha. That would be really nice if thats what ends up fixing it cause thats probably the single most thing that causes us time with reprints and tuning.
@robert if you are getting out of round circles then the auto cal isnt getting a good measurement which could be related to T9604 .
If the nozzles are good and clean and can make a good electrical connection with the calibration cube you should not need to touch backlash values.
Also as i mentioned there is no clear way to determine if you need to raise or lower the lash value without using a dial indicator.
@zachah that is weird considering the print takes about twice as long
@robert Please clarify. After the circling loading wheel, does it ever perform auto home?
@tutley I think if we didn't adjust backlash we'd be red tagging so many machines. The auto cal just gets us so far then the rest is just dialing it in til its in spec.
Fri, Aug 9
@tutley From vernier_dim-test.gcode
G1 F1216.3 X136.105 Y142.494 E52.77071
@zachah this was sliced using the standard PLA profile for both extruders. Feel free to adjust the slice to increase skirt distance. I do not think we should adjust overall print speed as that was the root of the original problem.
The cake is not printing faster than the original calibration gcode. It is much slower
When printing a few of these I noticed that the skirts have changed. I believe we need the skirt to be further away from the vernier to have time to adjust the Z offsets while the skirts are printing and to verify the squish consistency of the bed. With the skirts so close to the vernier we can't really do that. If we add back in the skirt from the previous g-code and also slow the skirt down just a bit that would help make calibration easier as well.
Thu, Aug 8
@matth are you able to pull the slack out on the control box side?
Wed, Aug 7
It's happened once before, probably from moving the printer. However, this occurred during printing during the past 24 hours or so. I popped it back in and is currently printing fine.
is it popping out on the frame side of the chain? on the pivot mount?
Can you add more detail to what is happening?
i agree standard for both was better
^ The first is the intial calibration print from Cal, which flagged this toolhead. The 2nd (with the 4 calibration attempts) is the "different speeds" gcode. The last photo is the calibration print from the "vernier1_green" gcode. FYI