1 Topic by jjcuff1

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Topic: What speeds with mod'd SD2 you run?

I have a stock SD2 with replaced surestepr drives (big differance)
I have Y step issues still with back belt and circles and some mild banding. I added jam nut fix.
I upgraded to a heater cartridge and grease the rods and adjust tension.

I have played with various speeds but prior to upgrades and now it seems to be very stable but I run
30 perimeters and outside and 20 inside and 55 infill rest are all inteh sub 30 range for most part

What is typical for my machine as is? what can you guys run. I print basic parts squares, rounds holes nothing intricate like figurines or large layers maybe 50-80 layers is the most I have done.

I am going to upgrade the to fine thread rod (wont effect speed) and rear pillar block to stop y steps, then print x/y carriage for bearings. I guess last step would be NEMA 17 in the y (would it help in the x)

SO is 60mms feasible?

is bowden allow faster then 60 with quality and reliability and easy to do?

SD2 owner- Surestepr, filament holder,QUBD servo and heaters, glass bed
Print for fun and for parts for my sports cars
current car is 88 IROC

2 Reply by elmoret (edited by elmoret 2014-02-13 22:39:42)

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Re: What speeds with mod'd SD2 you run?

I print at 150mm/s, stock setup. Not sure I'd call that typical, though.

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3 Reply by jjcuff1

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Re: What speeds with mod'd SD2 you run?

Dam for what values? any issues with circles or mis steps

SD2 owner- Surestepr, filament holder,QUBD servo and heaters, glass bed
Print for fun and for parts for my sports cars
current car is 88 IROC

4 Reply by elmoret

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Re: What speeds with mod'd SD2 you run?

What do you mean "values"?

I don't notice issues with circles, but I don't print them often. 95% of my printing tme (750 hours so far) is making these:

https://dl.dropboxusercontent.com/u/1786359/IMG_7955.JPG

The hoppers, not the lawsy parts.

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5 Reply by MolecularConcept

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Re: What speeds with mod'd SD2 you run?

i print at 60mm/s

6 Reply by jjcuff1

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Re: What speeds with mod'd SD2 you run?

I mean in your speed slicr file what values are 150mm/s

The outer perimeters? the infill or it is all set to 150mm/s My max speed is for outer perimeters at 30mm/s and infill at 55mm/ss

everything else is under 30mm/s there are like 9 values for speeds

SD2 owner- Surestepr, filament holder,QUBD servo and heaters, glass bed
Print for fun and for parts for my sports cars
current car is 88 IROC

7 Reply by elmoret

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Re: What speeds with mod'd SD2 you run?

Perimeters: 120mm/s
External perimeters: 60mm/s
Infill: 150mm/s
Travel: 150mm/s

the rest is gravy

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8 Reply by jjcuff1

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Re: What speeds with mod'd SD2 you run?

so you are about 3x on infill and 4x on perimeters
wow. That part is little easier i give you that then what I have done. i have more circles and features close to edges so switch back from internal/external perimeters within infill areas is common maybe why I can overshoots when it switches speeds.

but I will print out bearing holder for rear rod, do z, then try cranking my # up by 2x to see if it helps.

SD2 owner- Surestepr, filament holder,QUBD servo and heaters, glass bed
Print for fun and for parts for my sports cars
current car is 88 IROC

9 Reply by COASTER19

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Re: What speeds with mod'd SD2 you run?

I generally stick somewhere between 30-65mm/sec depending on the quality I want out of the print.

10 Reply by fcichock

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Re: What speeds with mod'd SD2 you run?

Ran a print at 100 mm/s (perimeters) today and was happy with how it turned out.  Set the extruder temp ~7C higher than normal.  Set infil at 80mm/s and there was a whole lot of shaking going on.  Thinking I need to identify a good acceleration limit...

11 Reply by Photog

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Re: What speeds with mod'd SD2 you run?

30-60 here. Infill at 45 because for some reason with a faster infill my extruder skips and doesn't push filament through.. Only on infill though, it's weird. Bridging at 20 else any faster and the strands snap. I have run everything but infill and bridging at 100 before with no problems but slower does produce better quality.

My SD3:  Clear plexiglass case, case heater, X axis stabilizer, Z axis stabilizer, thumb screws, filament guide, heatsinks on all motors, extruder fan, controller fan, heatsinks on motherboard, Y rod pillow block, USB and Power on/off switch, fully calibrated including trimpot tuning. Am I missing anything?

12 Reply by elmoret

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Re: What speeds with mod'd SD2 you run?

This guy does 750mm/s:

http://www.youtube.com/watch?v=zhV2jwhb9n8

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13 Reply by Tomek

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Re: What speeds with mod'd SD2 you run?

Photog wrote:

30-60 here. Infill at 45 because for some reason with a faster infill my extruder skips and doesn't push filament through.. Only on infill though, it's weird. Bridging at 20 else any faster and the strands snap. I have run everything but infill and bridging at 100 before with no problems but slower does produce better quality.

Do you "infill every X layers"?

I have a volumetric outflow limit, so I stopped really using infill ever X layers. It can be compensated by upping the temperature though

14 Reply by jjcuff1

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Re: What speeds with mod'd SD2 you run?

Well yes/no I infil every layer. but I also run at .28 layer height. the quality is fine for me too.

I have really dialed my printing in over the last year and have not touched the speed settings. I will do bearing upgrade to the XYZ this week first to minimize drag, skips etc then play with some increased speeds.

I have printed bigger parts that are detailed and they come out ok but they take so long it is time consuming to wait and especially if I am doing trial and error for some dimensions on fit. to print part every 4 hours.

Most parts are 30-45minutes. If I can cut that in half it would be awesome. so 110mm/s infill and 60mm/s print speeds.

I will get this running great first with bearings and I think to get speeds in the 100mm/s range I need a new design printer? having 100+mm/s print speeds would seriously open up the fun factor for printing bigger, detailed parts for me

SD2 owner- Surestepr, filament holder,QUBD servo and heaters, glass bed
Print for fun and for parts for my sports cars
current car is 88 IROC

15 Reply by COASTER19

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Re: What speeds with mod'd SD2 you run?

This guy does 750mm/s:
http://www.youtube.com/watch?v=zhV2jwhb9n8

How has his X-stepper not melted!

16 Reply by elmoret (edited by elmoret 2014-02-18 02:47:30)

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Re: What speeds with mod'd SD2 you run?

COASTER19 wrote:

This guy does 750mm/s:
http://www.youtube.com/watch?v=zhV2jwhb9n8

How has his X-stepper not melted!

Stepper motors are constant power devices. They actually run cooler under load, as more of the power is devoted to producing work instead of heat.

The exception is that some motor drivers decrease current when the motor is idle, but I don't think the cheap (A4988/DRV8825) drivers do this.

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17 Reply by Hazer

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Re: What speeds with mod'd SD2 you run?

As a note, that print got trashed because RH could not keep up.

He was very succesful at 500mm/s.

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18 Reply by solijohn

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Re: What speeds with mod'd SD2 you run?

Hazer wrote:

As a note, that print got trashed because RH could not keep up.

He was very succesful at 500mm/s.

In what way could it not keep up?

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19 Reply by RTRyder

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Re: What speeds with mod'd SD2 you run?

Most likely it was the computer running RH that couldn't keep up or the underpowered processor on the printer control board, the application just tells the hardware what to do, it has nothing to do with the real time data transfer or timing on the printer end.

20 Reply by jjcuff1

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Re: What speeds with mod'd SD2 you run?

The USB, like I suspect with skips on long jobs with lots of circles on my mac

isn't there a simple mod to eliminate the USB power bottle neck and just run off the brick? (IE I know this also stop you from communicating without the brick plugged in.

not to hijack, but on power,m I assume the upgraded Ramps 4 boards eliminate the power issues by allwoing more current?

SD2 owner- Surestepr, filament holder,QUBD servo and heaters, glass bed
Print for fun and for parts for my sports cars
current car is 88 IROC

21 Reply by Hazer

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Re: What speeds with mod'd SD2 you run?

solijohn wrote:
Hazer wrote:

As a note, that print got trashed because RH could not keep up.

He was very succesful at 500mm/s.

In what way could it not keep up?

Here is his blog on that 750mm/s print: (hint translate the page in google)

http://ichibey.exblog.jp/18477752/

Here is a complete print at 500mm/s to see final quality (which I think is pretty good considering the speed trade off), but also realize that if you read his blog that he has since made significant modifications since that print.

http://ichibey.exblog.jp/18401224/


The USB, like I suspect with skips on long jobs with lots of circles on my mac
isn't there a simple mod to eliminate the USB power bottle neck and just run off the brick? (IE I know this also stop you from communicating without the brick plugged in.
not to hijack, but on power,m I assume the upgraded Ramps 4 boards eliminate the power issues by allwoing more current?

I disagree. RH is simply a gcode repeater during printing, which is nothing more than a character sender. Low speed USB can move so much faster than the required speed of the gcode strings. High speed gcode has been done on RS-232 for decades. Now, how well your PC/MAC is setup with its USB drivers and other clutter is a different matter.

It would be interesting if there was a test done using both RH and a SD card print for comparison. In my own experience, I have been getting close to 500mm/s speeds on my HBOT and I have seen the occasional 'pause' while the printer is waiting for RH to catch up. But it never trashed the print.

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