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Re: reprappro firmware: getting probe values into a spreadsheet - 8 years ago
I feel misunderstood. I just want to probe an arbitrary set of points and not have to copy them one by one from the position display. I am thinking a 10x10 grid if I want to get crazy (and have the patience). Easiest solution would be to have the G30 command (not S-1) report the the x, y and z value. The P parameter would not matter because there is no intent to run a transform. Run a bunch ofby shadowphile - Delta Machines
reprappro firmware: getting probe values into a spreadsheet - 8 years ago
This is about my 300mm bed delta and ongoing efforts to improve accuracy. I would like to densely probe my bed in order to plot a contour map of ups and downs. Is there a way or command I can use to do a G30 S-1 then print out the result in the command line where I can cut and paste it in one column? Also, DC42, how level is your bed? I have shimmed and squared as much as I can and after autocaby shadowphile - Delta Machines
Re: how to size bowden tubing? - 8 years ago
Google Uniqueprototyping.com. I have their cold-end extruder and it solved my filament feed issues. It has a super strong holding force! The bulk of the cost comes from the down-geared stepper. They also have multi-extruder designs. Something to consider though: small OD filaments require more speed and less torque than big ones.by shadowphile - Delta Machines
Re: large diameter heated-bed design - 8 years ago
Quotedc42 Quoteshadowphile How is your silicone heater contacting/attached to the upper side (metal plate)? I found out this problem because I tried to print ABS for the first time and jacking the command to well above 100 C didn't seem to be enough. My 10mm cube was all warped! I stuck the silicone heater to the underside of the 6mm aluminium plate using the adhesive sheet that came already aby shadowphile - Delta Machines
Re: How do I work out the correct Bowden tube length 
- 8 years ago
Everything being equal, the back-force goes up tremendously when you start bending the path, depends on the bend radius, material size and type, etc. Even teflon will have this problem, surprisingly so. Making the tube longer will relieve sideways stress on the effector but I am thinking the longer length will cause more friction, subtracting from the gain achieved from going to a wider bend raby shadowphile - Delta Machines
Re: large diameter heated-bed design - 8 years ago
Sorry about al the previous posts, should have consolidated all my answers in one post. Quotejaguarking11 I use cheap thermal paste between bed and 2mm heat spreader and thermal paste between spreader and glass. The bed gets into the 100c range pretty good. I forgot that one other difference between this and my original Mini Kossel PCB heat plate was a layer of thermal paste across the whole thinby shadowphile - Delta Machines
Re: large diameter heated-bed design - 8 years ago
Quoteo_lampe It might help using aluminum foil between heater and cardboard to reflect IR rays partially. -Olaf There is a layer embedded in the cork, outside of the cardboard.by shadowphile - Delta Machines
Re: large diameter heated-bed design - 8 years ago
Quotemandrav I don't have much experience with this setup so take this with a grain of salt I would not put the thermistor in direct contact with the heater. The reason being that you want the temperature of the aluminum bed reported, not that of the heater (the latter getting really hot really fast, I would guess). With that in mind, I 'd test with the thermistor on a corner of the aluminum beby shadowphile - Delta Machines
Re: large diameter heated-bed design - 8 years ago
I agree that a metal plate would solve all heat transfer issues, just haven't been ready to discard my investment in glass and metal and kapton are easy to scratch. Kapton is expensive, especially in large sheets. However, too many people seem to get a glass setup to work for me to abandon yet. That is why I am confused..what are other (simpler) glass bed designs working ok? There is a major fby shadowphile - Delta Machines
large diameter heated-bed design - 9 years ago
Nobody else seems to be having problems with bed-heating performance but my recent construction is a complete fail! Comments are welcome, help is even better! I am particularly interested in other people using wide silicone heaters. I have a large delta-style build inspired by DC42's build, but the bed design is different. I thought I had a decent thermal design, but I am getting horrible behavby shadowphile - Delta Machines
Re: suggested addition to the dc42 firmware - 9 years ago
oops, used to relying on the Autocalibrate button, thanks. Also, my mistake, I already use 6 factor. I meant the arm radius. Normally one manually puts that in but your routine calculates it out. Bed curvature will not be detected as precisely if the probe region has a small diameter compared to the frame size, which means the XY print dimensions will have a larger error. Am I wrong?by shadowphile - Firmware - mainstream and related support
Re: suggested addition to the dc42 firmware - 9 years ago
On second though that might have a problem. If the diagonal dimension is calculated from the probing, a small pattern on a large frame might increase the error there.by shadowphile - Firmware - mainstream and related support
suggested addition to the dc42 firmware - 9 years ago
My normal zprobe pattern is setup for a 300mm bed, but for small prints I realized that I don't need to probe the entire bed and a small pattern should give me a tighter fit (assuming the smaller zone implies less average deviation). How about a way to use one (or more) alternate bed patterns from the interface?by shadowphile - Firmware - mainstream and related support
Re: DC42 firmware, multiple topics after first run - 9 years ago
never mind about sleep button, the model has stopped at the same spot 3 times now. Still trying to figure out why. Been messing with the slicer settings but no go. It pulls up fine in the online gcode viewer. The web print status says it is 100% finished. Is there a log somewhere? On a slightly different tact, the model imported into the interface is missing info like estimated filament usagby shadowphile - Firmware - mainstream and related support
Re: DC42 firmware, multiple topics after first run - 9 years ago
I ran into another new problem last night. I decided to leave a print going to get some sleep and tried out the Sleep check box (M1 command). I got up this morning and the printing had froze in place with the nozzle in a solid pile of ooze, seemingly right after I went to bed. The heat was turned off and the interface said the job was 100% complete.by shadowphile - Firmware - mainstream and related support
Re: DC42 firmware, multiple topics after first run - 9 years ago
I am using 6-factor because I am sure my rods are within .1 total (better actually; I used a precision jig with zero play to assemble them). (printer is running right now but I will check, maybe I entered a bad number) I was also very careful to ensure the rod spacing was spot on 80mm at all 6 locations, for this very reason. However, that doesn't account for all the other ways the carriages caby shadowphile - Firmware - mainstream and related support
DC42 firmware, multiple topics after first run - 9 years ago
Hi Dave, printed on my big delta for the first time tonight and I have some questions and observations: First of all, I have not changed any of your code from before when I was running the duet on my old mini kossel. The version I was using ok before and on the current setup is 1.09g-rc1-dc42 (2015-08-22). My scale is way off, like 5%. 68mm prints as 72mm. Since autocal does all the work I'm notby shadowphile - Firmware - mainstream and related support
Re: Anyone interested in a differential IR Z probe for deltas? - 9 years ago
oh..that is with 15 points btw in a roughly even spread.by shadowphile - Delta Machines
Re: Anyone interested in a differential IR Z probe for deltas? - 9 years ago
David, doesn't the calibration fit a flat plane to least squares of the probe points? I got my large delta finished but my cal results won't go below about .13 St Dev. It seems like the results won't be good unless the physical accuracy is right on. I am in the process of redesigning my stage carriages because they aren't square and stiff enough (and of course I reused the mini Kossel parts sby shadowphile - Delta Machines
Re: Beware MG Chemical PLA! - 9 years ago
olampe, thanks for the suggestion. I sent a detailed email to the tech support at MG Chemical; we will see if they bother with one user. While typing I started to realize that they may sell ok because the lowest common denominator printer style is cartesian/teflon-lined hot-ends, which might allow it to function. (it still seems like it has horrible properties). The seller at Fry's Electronicsby shadowphile - Printing
Re: Beware MG Chemical PLA! - 9 years ago
One other observation of this material: I say 'gel-like' because it becomes transparent in that intermediate state.by shadowphile - Printing
Re: Beware MG Chemical PLA! - 9 years ago
Hmmm.. interesting idea. I was thinking of them as a generic label. Most places that sell this quality don't take refunds once open and used. A refund would be nice.by shadowphile - Printing
Re: Oh the pain!... - 9 years ago
I want an alternate to PVA, which is messy and difficult to scrape off. Water works but not very easy. Nylons and T-Glase PETT both recommend PVA.by shadowphile - Printing
Re: Beware MG Chemical PLA! - 9 years ago
The last time I made an attempt to push it in by hand it just jammed. I of course thought to lower the temp, which actually made it worse because all it did was gelify and squish out directly into the wall of the heatbreak. Watching it turn into a squishy gel (in the skillet) well before it started to liquify is not what I would call a good design. It should go from hard to liquid with as littby shadowphile - Printing
Beware MG Chemical PLA! - 9 years ago
I was printing fine with blue 3mm PLA at 210 C on my delta but ran out and bought a different brand from the local store, MG Chemical Navy Blue (original was from a second pack so unknown brand). It started jamming almost immediately! After eliminating everything else I cut a small piece from the old and the new and put them in a cast iron skillet and turned it to medium whole pressing down and rby shadowphile - Printing
Re: Oh the pain!... - 9 years ago
I have been printing PLA on blue tape and a cold bed. I've made some very thin parts the size of a playing card and they were mirror flat after removal. I could place two back to back with no light visible! -I have a borosilicate glass bed. This is also called Schott glass but is basically Pyrex, so it has no expansion compared to window glass. Since PLA is supposed to have fairly low expansiby shadowphile - Printing
Re: Nylon Moisture - 9 years ago
I had this problem with the 910; filaments were 'frothy' unless I pushed it through very fast. I was keeping my filament fairly not greatly dry. Nylon tends to really suck up water. Note that Nylon can change it's dimension by as much as 7% although I'm not sure how much saturation that is. But 7% is .2mm of a 3mm filament so that could easily get too big for the heat-break. Taulman told me tby shadowphile - Printing
Re: does slic3r account for extrusion width in holes? - 9 years ago
How does that XY size compensation not change the dimensions of everything?by shadowphile - Printing
Re: DC42 firmware: dimensions and stuttering - 9 years ago
no, haven't touched the USB in quite a while. Now I only use it update the firmware.by shadowphile - Firmware - mainstream and related support
Re: DC42 firmware: dimensions and stuttering - 9 years ago
Thanks. I am collecting data to separate out the variables such as offset vs scaling vs noise vs extrusion width. Z axis and steppers are correct. The steppers stuttering does not seem to affect the printing quality so I guess I will ignore it for now. It is random and infrequent, more audible than visible. I should do a large spiral to get a better observation.by shadowphile - Firmware - mainstream and related support