chris398mx
Master member
I ordered 1 a few weeks ago. I hope it ships soon and I can get started. I have all the printed parts ready to go.
ERC TimSav - Cheap DIY CNC Foamboard Cutter
- Thread starter Edwardchew
- Start date
dutchmonkey
Well-known member
Good to hear
dehager
Well-known member
I have posted a few mods over on Thiniverse:
SG90 Servo Mount - https://www.thingiverse.com/thing:4034192
X Axis Belt Tensioner - https://www.thingiverse.com/thing:4034051 - Thanks for the inspiration dutchmonkey !!!
Tachometer Sensor Mount - https://www.thingiverse.com/thing:4029691
SG90 Servo Mount - https://www.thingiverse.com/thing:4034192
X Axis Belt Tensioner - https://www.thingiverse.com/thing:4034051 - Thanks for the inspiration dutchmonkey !!!
Tachometer Sensor Mount - https://www.thingiverse.com/thing:4029691
dutchmonkey
Well-known member
well you beet me to it i was waiting to get my kit before i shared the part to make sure it was level. i was also going to do the same for the servo mount.
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chris398mx
Master member
@Edwardchew , are the next batch of kits ready to ship? I am getting excited to start putting this thing together.
Edwardchew
Active member
Man that adjustable slider is super smart! Why didn't i think of that!
the blue colour is so cool
Hi Chris. What's your order number? 5th batch shipping out this week
chris398mx
Master member
@Edwardchew Order number 1012
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dutchmonkey
Well-known member
dehager
Well-known member
Arduino Nano/ Adafruit Metro Mini, 128x62 OLED and TCRT5000 IR sensor.
The plan is to have a programable preset rpm and let a PID loop maintain the speed as well as a knob to manual set a speed. Mechanical / electrical is the easy part. I am farting around with the code now. The good thing is I can do a dumb tach now and just update the code when I sort out all the bits and bytes...
dutchmonkey
Well-known member
Looks like my kit shipped not much longer now
chris398mx
Master member
Mine says it shipped too. USPS tracking says a company called NEWGISTICS has it and it hasn't arrived to the USPS yet. Does anyone know about this company? Are these kit shipping from the US or are they originating overseas?
dutchmonkey
Well-known member
Overseas from what i gather
jpot1
Elite member
Tried another cut and had some odd results. Picture below is the backside of the foam. I am running 8500 rpm and 1000mm/min. It seems like I’m not getting enough perforations per mm. I am using the Jtech laser plugin. Would there be any reason the cutter would not be adhering to the feed rate I entered in the plugin?
Otherwise slow the feed rate further? Increase rpm? Help please.
Otherwise slow the feed rate further? Increase rpm? Help please.
dkj4linux
Elite member
For years now, during the development of the needle cutter, I have always recommended 10-15 perforations per millimeter for good cuts in DTFB. Therefore, I personally would recommend slowing to 850 mm/min to get the 10 perfs/mm at 8500 rpm cutter speed. I honestly don't know where Edward came up with 2000 mm/min and 8500 rpm... that should only give 4-5 perfs/mm and looks like maybe that's what you are seeing. I've not made a big deal of it because, for reasons unknown to me, Edward has been cutting foam with surprisingly good results and building airplanes... i.e. so it's hard to argue with his results. But if I was seeing what you are seeing, I would slow down and see what happens. It won't cost you anything except a little time to check it out...
jpot1
Elite member
For years now, during the development of the needle cutter, I have always recommended 10-15 perforations per millimeter for good cuts in DTFB. Therefore, I personally would recommend slowing to 850 mm/min to get the 10 perfs/mm at 8500 rpm cutter speed. I honestly don't know where Edward came up with 2000 mm/min and 8500 rpm... that should only give 4-5 perfs/mm and looks like maybe that's what you are seeing. I've not made a big deal of it because, for reasons unknown to me, Edward has been cutting foam with surprisingly good results and building airplanes... i.e. so it's hard to argue with his results. But if I was seeing what you are seeing, I would slow down and see what happens. It won't cost you anything except a little time to check it out...
Will do. As they say, slow and steady....
Just have no clue how the others are running so fast.
Which tachometer are you using? Could it be a false reading? If you want to copy paste some of the first section of your gcode here we can make sure its outputting the correct feedrates.
jpot1
Elite member
Using the banggood tachometer that Edward recommended. I’m seeing the F1000 command in the gcode so I’m thinking it’s right?
chris398mx
Master member
How long did it take to get your kits from Edward once you got the notification that it shipped? My kit shipped on Dec 10 per the email from EdwardRC, but USPS still does not show receiving it. USPS shows NEWGISTICS has the package (whoever they are) I am hoping to get it soon, but am starting to worry it will never arrive.
Grifflyer
WWII fanatic
My first guess is that they're just busy because of the holiday, I had a package go a week past the expected date recently. And it was shipped from the states.
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