Topics created by briskspirit

Ah, I see what you mean. That can work as well. I do that myself. You would have to have seperate homing macros that would configure the endstop and do the homing or probing move.

Here's my hometoZmax macro as an example.

; HomeZMax.g ; Called to home Z to max endstop M574 Z2 S1 ; Set active-high switch (Opto) at the high end for Z Max. G91 ; Relative positioning G1 S1 Z330 F300 ; Move bed down until endstop triggers

@dc42 That card was with Duet and worked fine. New web interface helped to solve this error.

I was using a backpack blower on the stock hotend which was too high on the block. Someone made a modified one for the Volcano hotend and that worked perfectly, I have since switched to a MK10 hotend and now use a Thorped turbine cooler that works well, however because I had to mirror the part, I couldn't use the stock fan mounting position, I Macgyvered it with some blue tack- hey, 100 hours later and it's still firmly attached.

One day I will design my own, but my cad skills are still pretty limited.

I'm glad you solved it.

The major cause of low-frequency ringing on a well-built machine is likely to be the interaction of the elasticity of the belts and the moving mass. That's why it's generally helpful to keep the moving mass as low as possible.

@briskspirit said in Print FAN0 problem, works as always on?:

Ok, have found a problem. I have 5V FAN1, FAN2 and always-on fan + 24V brushless air pump. So I need to change V_FAN to 24V and use a convertor for my 5V fans or find source of 5V because(as I assume) of flyback diode.

That's right. When using controlled fans/pumps that take different voltages, V_FAN must be the highest one, otherwise the flyback diodes will conduct.

@dc42 Thank you ! Lapping stepper with oil - run for ~30min forward / ~30 min backward - towel and repeat . Noise is almost gone, turning better. Will see if I could reanimate it.

@deckingman This is the only problem with the bearings? It is FFCP clone and I am at the middle of nowhere...(It is disassembled for upgrade process with Duet, 16T gears, 8x2T rod and etc...) Right now I need to assemble it(without problems as z-banding and etc) to print some parts ))) It is a loop )))

Hey there!

Just bought my Duet 2 Wifi, and I have a Qidi X-Pro as well.
How did your conversion go? Did you manage to find all the appropriate settings?

@briskspirit said in Rotor inertia:

But what about rotor inertia? 34mm - 35g/cm, 40mm - 54g/cm. Is it a big difference? Is it critical?

To answer this initial question: If you are e.g. using 16tooth GT2 pulleys on the rotor this will add an artificial mass of of 130 or 210g respectively to the mass of your Y axis and will slightly reduce your maximum acceleration. Unless you have a featherweight Y axis these extra masses due to rotor inertia don't have much influence.

For details see Maximum Acceleration Calculator.

One learns something new every day.........

This was my attempt to use 10x8x500mm CF rods roll wrapped tubes.
https://www.youtube.com/watch?v=y-h5bUulqL4

Here are the tubes.
https://smile.amazon.com/gp/product/B00RWYANKY

Tolerances DO vary. One batch I got from a particular manufacturer was so bad I returned them. The ones I got from ARRIS though required only minimal work on 2 of the 4 tubes with 2000 grit sandpaper and a quick polish and they were smooth end-to-end in the Igus bearings.

When I decided to upscale to a 500x500mm print area I tried 12x8x1000mm tubes but the tolerances were so bad I gave up and went with the Igus 17mm rails.

alt text

@t3p3tony ok now smaller again.

@supraguy Replicator-like printers has one end stop at the bottom of the Z axis
Need to buy Z-probe too... but tough to choose which one in my case with PEI detachable bed with spring steel underneath

@briskspirit said in Different lead/pitch for Z axis:

@supraguy Is it noticeably slower for printing 0.1-0.2 layer heights?

I'm sure that you'd never notice the speed. I left my maximum speed and acceleration settings the same, so there probably is no difference that way.

What I do notice is that it's so much quieter, which is nice.

ive just used the standard semitiec thermistor with the e3d for the last 2 years with no problem. Although i just bought a PT1000 from DJdemons site (https://www.precisionpiezo.co.uk/product-page/pt1000-sensor) that fits the standard E3d cartridge so im keen to print some higher temp filaments

@dc42 Overall sheet thickness is 0.85-1.00mm with steel. So PEI should be ~0.5mm, but surface is rough and different colors (blue/white)

And PT100 2-wire can't be used with connectors? And 4-wire can be?

@briskspirit, that's odd. Is it the exact same GCode file? I think it's an extruder problem; but if it happens once every X mm of filament consumed, then reducing the extrusion rate should have increased the wavelength.

Waiting for parts now, this is what I will do:

MK8 cooling block wit M6 threads that I will drill/tap to M7 threads (E3D heat break) one Micro Swiss all metal E3D heat break + E3D clone full bore 4.1mm heat break E3D clone heater blocks Micro Swiss TwinCladXT plated 0.4 nozzles.

So at the end I will get E3D compatible extruders. One will be all metal and other will be with Capricorn PTFE tube to the nozzle(for PLA)

Second stage:

Change steppers to Nema 17 1.2kg/cm (22mm long) + 2.75 gears + Bondtech gears.

So should be very reliable printing head at the end )) But will see))

So today I have calculated my steppers for XY that I have right now:
Approximate peak back EMF due to rotation per motor: 7.8 V at 200.0 mm/s
Approximate peak back EMF due to inductance per motor: 1.9 V at 200.0 mm/s
Step pulse frequency: 18.8 kHz at 200.0 mm/s
Speed at which torque starts to drop (low slip angle): 174.2 mm/s @ 23.2 kHz
Speed at which torque starts to drop (high slip angle): 236.8 mm/s @ 31.5 kHz

This means that I don’t need to change them? And how to take into account weight of the carriage?

P.S.:
One more crazy idea was to split carriage for 2 independent extruders. But that will give me more weight on Y axis..