Jump to content

Voron 2.4R2 acrylic doors cracking/Randells hinge mod.


SamppaD

Recommended Posts

HiI hope that 3d community is doing well.  I have a strange issue with Voron acrylic doors cracking around drilled holesSo I was just finishing my build and decided to go with Randell hinge mod instead of VHB tape LDO hingesAs my doors didnt have any drilled holes for this mod to be used,i needed to drill holes in to panelsDrilling acrylic can be a issue and needs specific drill bit for acrylicSo i got the correct tools i needed  and started the job by marking and  drilling really slowly needed holesEverything went fine,no cracks on the panels around the holesPrinted hinges and assembled partsTightened bolts gently just about bolt head to contact the panel and snug itWell that went fine no issuesI had some other job to do in between and after few hours got back home to mount the panelsGot surprised that front doors panels have cracked around the holes in multiple directionsThis was a nasty surprise so i then decided to fit the doors as to make sure that panels fits and guess what,front doors panels are like 0,5mm too wide to be able to close,just my bad luck? I got my panels from Lector,good store,never had issues with parts from themSo  acrylic doors are however cut to wide to be able to close with randells hinge,but it doesn't explain panels cracking..any idea what could explain this cracking issue? I inspected printed parts,no issues,all the heat inserts are just below the printed surfaces and lenght of the screws used is correct.

Link to comment
Share on other sites

Hi @SamppaD

Acrylic is tough to drill without getting cracks. You think you're not applying too much pressure... then crap happens.

Acrylic can be solvent bonded with toluene or MEK but there are solvent formulas available specifically design to bond acrylic sheets together (think fish tanks). Solvent bonding literally dissolves the plastic and after a few minutes evaporates leaving the parts fused together. You can pick up some acrylic solvent cement on Amazon (if they sell it in your area) maybe Lector has it. Anyways... you can fill a syringe with a needle tip with the bonding solution and apply a small amount to the inside of the hole or directly on the cracks. You will see it wick into the cracks but be super careful not to drip it on the surface as it will damage it. You don't need a lot, the equivalent of one drop should be enough to fill all of your cracks.

  • Like 2
Link to comment
Share on other sites

Yea,everything is possible,I was drilling really slow without pressing in to the acrylic and everything was looking  fine after drilling and assembly of the hinges..I didn't see any crack on the acrylic after assembly...Cracks appeared after assembly ..strange . Well I left message to lector as it looks like he has panel kit that is intended to be used with Randell hinges mod,pre drilled at factory so lets see if i can get lucky and purchases front doors from him.

  • Like 1
Link to comment
Share on other sites

If you are using alcohol to clean plexiglass it *WILL* crack.  Don't use alcohol products ever to clean that; use other things; simple Windex will work.  

 

To drill, first, add tape on both sides of the sheet, then something thin like plywood or paneling on both sides, clamp that down and drill it. You can also take a propane torch and flame the edges. Drilling it underwater would be best, but good luck with that.  Drill small then bore out larger helps as well.

 

Link to comment
Share on other sites

These are brand new panels,protective film still on the acrylic,never cleaned with alcohol or used thread lockerPanels just cracked few hours after i installed hingesDidn't notice any cracks when installing hingesStrangei have drilled acrylic few times before and never had it crackedIf it cracks then it cracks when drillingWell i need to replace doors but unfortunately closest shop that have ability to cut acrylic is doing it with tools that doesn't leave a nice cut edgeI'm searching for replacement doors online as i don't need panel kit and  in meantime waiting for Lector to reply to my email.

Edited by SamppaD
Link to comment
Share on other sites

It’s possible that you got a bad batch of acrylic. If possible, contact the vendor for replacement. BTW, I ordered acrylic panel set from printedsolid.com, when I built my V2.4 and they are great. Drilled holes for hinges with no problems.

Edited by SuperBoppy
Link to comment
Share on other sites

19 minutes ago, SuperBoppy said:

It’s possible that you got a bad batch of acrylic.

Highly unlikely. It's not like acrylic sheet is made in some mom and pop small business. These sheets are made in large factories where there's a good amount of production & quality control. More likely that it could have been stored for a long time under sub-optimal conditions. Either way... it's just speculation. On the flip side... everyone's arm is calibrated differently, what I consider light drill pressure someone else might consider as too much and vice versa.

My guess, and sorry for jumping in here and pooping on your discussion with my not so valid opinion, is that if one drills into the sheet and the sheet can flex from drill pressure... you will get cracks or at a minimum increase the likelihood of cracks. If you have the sheet on a solid surface when you drill, there will be less flex and less chance of getting cracks. So basically, there are lots of variables that can affect the outcome pressure and support just being two of them, drill sharpness, rpm, etc.etc.

  • Like 1
Link to comment
Share on other sites

HiI suspect that this is acrylic,order states Voron V2.4 300x300 Enclosure Panels Set (ABS + PMMA)
ReferenceVRN-24R1-NCLSR-300-ABS-PMMAAs for quality issues that can  cause cracking i cant find any,acrylic panel is clear no air bubbles inside of the panel,and all edges are nicely cut

If something to complain is that panels are 0.5-1mm cut to wide so even assembled cant close front doors with randells mod.

Link to comment
Share on other sites

I talked with Lecktor and he will be making a new set of doors for meApparently original Voron doors doesn't work with Randell's hinges,due to clearance issuesSo in any case doors needed to be replacedProblem solved.😀

  • Like 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...