scalability on dibond version about mendel90 HOT 9 CLOSED

Odd, I just tried it and can't see any of the issues you describe.

from mendel90.

I can send you the config.scad file I used if it would help. We discovered the issues when assembling the Dibond. My friend rendered under OSX, and was able to see the issues (My i5 never finishes rendering).

from mendel90.

I just changed the three dimensions you mentioned. In general making things bigger doesn't cause problems. Making it smaller can cause things to collide.

Did you change something else, like the PSU size, for example? I suggest you start with the original config and change one thing at a time until you find what breaks it.

from mendel90.

I did this back in October, the version is from October 9, 2013. To my
recollection I only changed the dimensions of the build area, but the
config is attached.

The issues are not visible in an SCAD compile view, and the SCAD render
does not ever complete on my i5 so I am unable to further troubleshoot it.
We made the (four) Dibond sets from files generated on my Win7 laptop, but
my friend independently downloaded SCAD on his Mac, compiled and rendered
with this config file, and he was able to see the issues that we
encountered.

On Sat, Feb 1, 2014 at 10:06 AM, Chris [email protected] wrote:

I just changed the three dimensions you mentioned. In general making
things bigger doesn't cause problems. Making it smaller can cause things to
collide.

Did you change something else, like the PSU size, for example? I suggest
you start with the original config and change one thing at a time until you
find what breaks it.

Reply to this email directly or view it on GitHubhttps://github.com//issues/40#issuecomment-33875337
.

from mendel90.

I don't think you can attach files other than images to Github. I don't wish to spend any more time on this as as far as I am concerned it works with those dimensions. You can compare your config with the latest on Github yourself and see what you changed.

Nothing has changed since September except the manual and BOM.

If F5 doesn't ever complete then there is something seriously wrong and I am not too surprised it doesn't generate the correct files. I would never build anything without looking at the render first.

from mendel90.

I used Gmail to attach but apparently GitHub blocks a 2K file. F6 never
completes but F5 works. The instructions say to edit the config and run
the Python scripts, so the significance of being able to view first was
lost on me.
Likely to annoy somebody but the config file follows:
//
// Mendel90
//
// GNU GPL v2
// [email protected]
// hydraraptor.blogspot.com
//
// Configuration file
//
echo("DiBond:");

Z_bearings = LM8UU;
Y_bearings = LM8UU;
X_bearings = LM8UU;

X_motor = NEMA17;
Y_motor = NEMA17;
Z_motor = NEMA17;

hot_end = JHeadMk5;

X_travel = 240;
Y_travel = 280;
Z_travel = 220;

bed_depth = 254;
bed_width = 294;
bed_pillars = M3x20_pillar;
bed_glass = glass2;
bed_thickness = pcb_thickness + sheet_thickness(bed_glass); // PCB
heater plus glass sheet
bed_holes = [249, 289];

base = DiBond; // Sheet material used for the base. Needs
to be thick enough to screw into.
base_corners = 25;
base_nuts = true;

frame = DiBond;
frame_corners = 25;
frame_nuts = true;

case_fan = fan80x38;
psu = ALPINE500;
controller = Melzi;
spool = spool_300x85;
bottom_limit_switch = false;
top_limit_switch = true;

single_piece_frame = true;
stays_from_window = false;
cnc_sheets = true; // If sheets are cut by CNC we can use
slots, etc instead of just round holes
pulley_type = T2p5x16_metal_pulley;

Y_carriage = DiBond;

X_belt = T2p5x6;
Y_belt = T2p5x6;

motor_shaft = 5;
Z_screw_dia = 6; // Studding for Z axis

Y_carriage_depth = bed_holes[1] + 7;
Y_carriage_width = bed_holes[0] + 7;

Z_nut_radius = M6_nut_radius;
Z_nut_depth = M6_nut_depth;
Z_nut = M6_nut;

//
// Default screw use where size doesn't matter
//
cap_screw = M3_cap_screw;
hex_screw = M3_hex_screw;
//
// Screw for the frame and base
//
frame_soft_screw = No6_screw; // Used when sheet material is
soft, e.g. wood
frame_thin_screw = M4_cap_screw; // Used with nuts when sheets
are thin
frame_thick_screw = M4_pan_screw; // Used with tapped holes when
sheets are thick and hard, e.g. plastic or metal
//
// Feature sizes
//
default_wall = 3;
thick_wall = 4;

On Sat, Feb 1, 2014 at 11:06 AM, Chris [email protected] wrote:

I don't think you can attach files other than images to Github. I don't
wish to spend any more time on this as as far as I am concerned it works
with those dimensions. You can compare your config with the latest on
Github yourself and see what you changed.

Nothing has changed since September except the manual and BOM.

If F5 doesn't ever complete then there is something seriously wrong and I
am not too surprised it doesn't generate the correct files. I would never
build anything without looking at the render first.

Reply to this email directly or view it on GitHubhttps://github.com//issues/40#issuecomment-33877060
.

from mendel90.

I don't think F6 will ever complete on any machine because it would try to make a single object out of the entire machine. F5 is used for assembly views. F6 is only used for making STL and DXF files of individual objects.

The reason it goes wrong with your config is you have the bed width and depth the wrong way round. So it makes the cut out in the gantry too wide compared to the length of the X axis, which then causes all the problems you saw.

from mendel90.

Remaining questions, what is purpose of square-bottom slot
(nothing to route through there) and why square-bottom is considered CNC
millable with a round bit?

On Sat, Feb 1, 2014 at 12:04 PM, Chris [email protected] wrote:

Closed #40 #40.

Reply to this email directly or view it on GitHubhttps://github.com//issues/40
.

from mendel90.

The long thin square bottom slot disappears when the bed size is set
correctly. It is caused by the gantry fixing block overlapping the stay
sheet. One of the screw holes for the block drilled through the gantry hits
the stay and makes a long thin slot in it.

No it would not be millable but it shouldn't be there and isn't when the
config is correct.

I use a cylinder 100mm long to drill the holes so that I can see them
easily when I make them visible to check they line up exactly with the
screws. Normally they would only affect the target sheet but the fixing
blocks are processed as a list so all the holes are subtracted from all the
sheets. As the sheets are orthogonal there are no drill collisions provided
they don't overlap the plastic parts.

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