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Damn! That’s a lot of head scratching. I have some time today to try it out

Cheers Rob.

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Hi yanax,

This is the exact same setup I run, the daGHIZmo & that same SG90.

As Dan said check your pinouts are correct.

You can test the Pen Up / Down under Manual Driving in the Makeangelo software.

ALso you may need to tweak the Pen up and Down angle in robot_polargraph.h

Here is the angle’s that work for me.

#define PEN_UP_ANGLE (180)
#define PEN_DOWN_ANGLE (140) // Some steppers don’t like 0 degrees

Cheers Rob.

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@Tan Mavitan You also might want to grab the latest firmware from github, there has been some fixes for screen draw on the LCD.

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Hello Tan,

What LCD is it, the 2004? Also what Conteller (RAMPS, RUMBA?)

I just added a LCD to my Makeangelo Clone and noticed this as well, so thought I should check here for answers.

With mine, I clicked print then it went blank on the LCD and I could bring up a menu that had resume/stop/something else.
I clicked resume and it started but my pen didnt go down.

So far I only got it to plot via SD Card by removing some starting lines ==>

[img]https://i.imgur.com/ZT5l8UU.jpg[/img]

I’m also cutious how you pen up from the LCD manually and How you send the Page Size at the start etc like the Java App Does?

Cheers Rob.

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Hi Dan,

Thanks so much for everything, you are an amazing person. Your Software/Firmware/Development is outstanding!

Also I think i’m getting the hang of this 🙂

View post on imgur.com

[img]https://i.imgur.com/Znf99HI.jpg[/img]

View post on imgur.com

[img]https://i.imgur.com/ljB7uRN.jpg[/img]

View post on imgur.com

[img]https://i.imgur.com/KI6AWZD.jpg[/img]

View post on imgur.com

[img]https://i.imgur.com/f4xXPXM.jpg[/img]

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I have now found the correct paper placement and home position again after adding the guides, its pretty much bang on the homing template that you provide!

So i did another Hilbert Curve (soo bored of this test pattern right now!)

i’ve slowed the accel/speeds down to 400 & the pen has had its day 🙂

it’s getting better but not producing perfectly straight lines, is this the best that i can hope for?

View post on imgur.com

Cheers Rob.

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I have added the standoffs as suggested

View post on imgur.com

It’s taking me some time to get my page in the right spot and find the correct home position to avoid the Smile or Frown at the top of the drawing.

Cheers Rob.

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Thanks!

SO i am just trying 547 now

View post on imgur.com

It does seem slightly better, It is bowed because my home point will need to change with the width change
I did find some standoffs and longer bolts in my parts bin, so would the width measurement then be taken from
them points? i’ll try that next.

View post on imgur.com

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Hi Dan,

That is fantastic, Happy to be a beta tester. We don’t even need the fancy graphic outputs the same info as the 20×4
would suffice for me

Cheers Rob.

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Ok so I have done my homework!

I used inkscape to draw a 200mm line and some text, object to path and exported as a DXF as that is what the GUI seems to like best.

Here is my results

View post on imgur.com

My concern is how I have measured the Machine Width and not certain I have done it correctly and that is affecting the Math of the output.
Centre to centre of my stepper motors is 547mm, The Radius of my Pulleys is 5mm (16T pulley, so 2×16=32mm circumference) so I set 537 as my Machine Width (which is the right most side of my left stepper to the left most side of the right stepper i.e. groove to groove)

is this correct?

Cheers Rob

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Hey Guys,

I’ve got exactly the same LCD screen as the one linked and use the Rumba board.

Did you make any progress Andrew?

I’d love to get the SD Card up and running for untethered plotting!

Cheers Rob.

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Hi Dan,

I will try that now and report back, but so far dimensions are outputting the same as in the GUI

I’ve slowed it right down to 500 Accel/Feedrate and this is the results so far ==>

View post on imgur.com

Cheers Rob.

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Finally getting some better results

View post on imgur.com

View post on imgur.com

The improvements are settings Paper 10.5 from top and Pen Home 23.5 from top.

The bow has completely gone but the lines that should be straight in the upper half are noticeably curved but it gets better as you get lower.

Not sure how to resolve that one.

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