- User Since
- Jul 3 2017, 9:50 AM (126 w, 4 d)
Oct 9 2019
Oct 8 2019
Thank you @sarahv! Could we also get one for tc-receiver? It looks like that one got missed since it wasn't in the description with the rest.
@sarahv I believe we are ready for you to make numbers now
Between the belleville washers and the changes to plate thicknesses to have 10x the stiffness in the gantry plate vs base plate, this is resolved
Samples have been received. Moving this over to Gate 2 as work still needs to be done, but the Gate 1 work is complete
Epocs loved what we showed them with only minor feedback that has been taken into consideration and applied where applicable.
We just finished getting those numbers into drawings. Thank you @sarahv!
Oct 7 2019
Oct 4 2019
Took care of this since drawing dimensioning no longer works with FreeCAD 0.18 and thus we needed a functional template for Techdraw. Turned out to be some extra things inkscape had in the file that Techdraws SVG interpreter couldn't comprehend, such as translations. Solution was to go into inkscape and select all, delete layer, paste in place. This essentially resets the objects to de-link them from the weird code. This solution was taken from the tutorial here https://www.freecadweb.org/wiki/TechDraw_TemplateHowTo
@logan Thank you for taking care of that. I had considered changing the names for clarity as well.
Oct 3 2019
Josh and I met with Randall at Epocs this morning and went over the currently modeled sheet metal. I emailed him the LCD enclosure front for a little further review he will have with the press brake operator tomorrow morning, but aside from that he loved all of the current sheet metal designs with just a few very minor modifications to better fit their tooling to save us some money. They also can hit our timeline for Alphas if we get them RFQ next week and place the order quickly once we have the quote.
Oct 2 2019
We had a spontaneous meeting with @eBeardslee and settled for now on making the machine a little taller (estimated 210mm), and having the filament under the machine, in the front, using some of the spare space under the bed there. We are working on this presently.
@tutley is working on a rear crossbar that will use screws and springs to introduce adjust-ability
Additional concerns came up in R&D this morning.
I found the tslots cut squareness tolerance, which is 0.003" per inch. This gives us an angle of 0.20302 degrees on the short side (30mm) and .406026 on the long side (60mm). This gives us 0.885846 and 1.77167 difference over the 250 travel, 1.77169 and 3.5433 over the 500 length of the extrusion.
Oct 1 2019
@cmerot a machining tolerance per ISO 2678 for a 30mm length is 0.5° aka 30'. so, if we aimed for perfect that is our realistic worst case scenario, which is what we need to plan to see. Over the Z build volume of 250mm that alone would cause a difference of 2.18mm. Since we would be leveling the bed to the head, what this would result in is the print shifting by that 2.18mm over the range of the print. We think we need a different solution than just trying to machine the surface of the extrusion perpendicular to its sides.
Gregg just showed up here for something else and I quickly showed him the current design. He said he likes it.
@eBeardslee We had considered trying to mount spools on the back, but that may be a tipping hazard. Additionally, it may be hard for users to get to the back of the machine if its up against a wall. It also would need to have a 90 degree angle spool arm in order to fit the spools. The footprint would also be considerably larger. None of those are necessarily stopping points except for the first one, which is unconfirmed.
The intent is to have these as spacers between the bottom plate and the extrusions, no counter bore.
It looks like the USB chip on the Archim is USB 2.0
From Christian, for our situation "the ratio of stiffnesses is [(thickness-top)/(thickness-lower)]^3. If the top plate is more than 2.15X the thickness of the lower, it is about 10X as stiff."
Sep 30 2019
Per T10176 we need to look into options for machining the end of at least one of these (z axis rail) to sit perfectly on the top plate, and also put in shoulders to locate against dowel pins in the top plate
We have a meeting scheduled at Epocs for this Thursday, 10/3, at 10:30 to go over what we have and get any final input from them before finalizing
Per the industrial design meeting today, we would like to see about getting custom engraving onto the flex plates for branding purposes
Per the DFM review, we should check with our machine shops to determine if the slot or the dowels is more economical, but either option is approved
Per our DFM meeting earlier today, we are to look into having the ends of the extrusion milled, and add shoulders to them as well, to match with dowels (two on the side and one in back) to locate it position-ally as well
We have reviewed and are moving forward with this
Per our meeting today, we are aiming for the following:
That last one does look like our best bet from what I have seen so far
That solenoid is only rated for a max ambient temperature of 40c, but otherwise looks quite promising.
Sep 27 2019
Sep 26 2019
From the E3D forums this morning, someone is starting to work on a design for this machine using our wiper pads - https://forum.e3d-online.com/threads/wiper-designs.3383/
However, this is based on E3Ds brush holder design, which mounts into the acrylic panels we are getting rid of.
Sep 24 2019
changing to low priority as work is done and this is just needed as a note for getting into drawings
changed status to low as we have one option ready
changed to wishlist as fallback is to leave as-is
Changed to wishlist, as we could move on without it if necessary.
Merged T9995 as only one or the other option we be implemented, if either.
lowering priority as we have something and implementation just needs to be finished
lowering priority as we have an option
lowering priority as it is currently up to review
Setting to low since we have something, but leaving open since drawings still need to be done
The meeting went well, and we gained a lot of knowledge. We will be doing the sheetmetal design itself in house due to their ISO certification preventing design work, but once T10176 is settled we will meet with them again to finish up the design.
switching to wishlist priority - if we miss the target date, we move on without it.