littleRP compared to form2

[pelgrim @pelgrim My Robox is a Green Kickstarter Early Bird Belgium, Flanders]

@bhudson

I’m very interested in the performance of the littleRP you have.
You still need to start with it, so I know I need to have a lot of patience.
I would love to compare the work you do with the performance of the form2 and see if you can get the same accuracy out of it.

An example of what I’m working on right now (picture attached):
it’s an enclosure for an array of steel bullets of 2mm diameter, printed in 2 parts.
The bullets stick out between 0.1 and 0.2 mm and can move free in their enclosure.

It took 6 or more itterations to get it just right and at least the drawing has a max tolerance of 0.025 mm to get things working.
How their slicer handles stuff I have no clue.
I created a larger version of this (bigger surface, a lot more holes), and the bullets fell right through.

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java (EE), JavaFX, HTML, GIS) programmer, database wizard, framework inventor, looking for a job ! http://roboxing.com/wizards

[Pete @pete My Robox is a Blue Commercial Version CEL HQ Bristol UK]

can you print a basic shape like the cube in this video? Both links are to the same video at different times.

I am interested in another comparison of accuracy. I know SLA can achieve more detail than FDM/FFF but the accuracy shown in this video is alarming.

For official support please visit www.cel-robox.com/support/ and create a ticket

[pelgrim @pelgrim My Robox is a Green Kickstarter Early Bird Belgium, Flanders]

Next time I go to the fablab I will certainly do that.

Thanks for these videos, they show what I tried to say to Ben in another topic:
the rotation of how you print stuff has an affect on the quality of the print,
when used to filament printing, it’s the world upside down.

java (EE), JavaFX, HTML, GIS) programmer, database wizard, framework inventor, looking for a job ! http://roboxing.com/wizards

[BHudson @bhudson I have several Robox units Kickstarter and Commercial Arizona, USA]

@pelgrim I am working on getting prepped to start on the LittleRP. The Prusa I have on the way may give me the kicker to get it going since with the larger bed I may be able to print the UV cure station and wash station I have designed instead of building them out of plywood as I had originally planned. I will try to remember to give you an update when I actually have the printer together and working.

I operate two Betas and one Production Robox.
I am the US/Canada Technical Support engineer for the Robox.
See my 3D Hub site at https://www.3dhubs.com/phoenix/hubs/ben

[pelgrim @pelgrim My Robox is a Green Kickstarter Early Bird Belgium, Flanders]

we use this as a UV cure station in the fablab,
it’s cheap and also recommended by formlabs.

java (EE), JavaFX, HTML, GIS) programmer, database wizard, framework inventor, looking for a job ! http://roboxing.com/wizards

[Ian @datman]

I have backed the slash, I hope the print details are OK. Bit worried edges are not sharp. Will still be OK for me anyway.

[pelgrim @pelgrim My Robox is a Green Kickstarter Early Bird Belgium, Flanders]

@pete

printed a calibration cube of 20 mm on the form2.

X axis: 40 microns too big
Y axis: close to 100 microns too big
Z axis: less then 10 microns too small

measured with calipers that have marks 20 microns acurate,
so I was looking at the closest mark and estimated.

java (EE), JavaFX, HTML, GIS) programmer, database wizard, framework inventor, looking for a job ! http://roboxing.com/wizards

[Pete @pete My Robox is a Blue Commercial Version CEL HQ Bristol UK]

@pelgrim is there any advice from Formlabs to resolve the accuracy problem?

For official support please visit www.cel-robox.com/support/ and create a ticket

[pelgrim @pelgrim My Robox is a Green Kickstarter Early Bird Belgium, Flanders]

I’m not a direct customer, the printer is property of the fablab I’m visiting.
I gave the owner the cubes and measurement results, it’s up to them if they act on it.

“Resolving” things would have to be done on the machine itself, hopefully firmware update.
As you probably know, most prints are not flat on the bed in a form2 but at an angle,
so I can not see a way to compensate in the end-user software (preform).

I was able to print my bigger version of the japanse baren (see picture), as described in the opening post of this topic, so for now I’m happy with the accuracy of the result.

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