# Dent in Resin Tray caused by Wiper arm **URL:** \ **Category:** Form 2\ **Created:** [October 4, 2018, 1:59pm UTC](https://forum.formlabs.com/t/dent-in-resin-tray-caused-by-wiper-arm/20676 "2018-10-04T13:59:19Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![epicmcd](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.formlabs.com/epicmcd/32/9302_2.png) [@epicmcd](https://forum.formlabs.com/u/epicmcd)\ **Post date:** [October 4, 2018, 1:59pm UTC](https://forum.formlabs.com/t/dent-in-resin-tray-caused-by-wiper-arm/20676/1 "2018-10-04T13:59:19Z")
Anyone else experience this? My printer has been “parked up” for a few weeks and this morning i wanted to use it, but decided to clean out the resin tray first. I noticed that there was a 5x1mm rectangular indent in the silicone, pretty much smack bang in the middle. then when I went to clean up the wiper, noticed the same shape is in the middle of the underside of that, it’s like a little tooth which protrudes slightly beyond the wiper blade outer ring. I married the 2 up and it is definitely that feature that had left a dent in the tray. The wiper arm was in the position it parked into after the last build. Thoughts Marcus ---
**Author:** ![JohnHue](https://avatars.discourse-cdn.com/v4/letter/j/48db29/32.png) [@JohnHue](https://forum.formlabs.com/u/JohnHue)\ **Post date:** [October 4, 2018, 2:09pm UTC](https://forum.formlabs.com/t/dent-in-resin-tray-caused-by-wiper-arm/20676/2 "2018-10-04T14:09:21Z")
This has been reported several times, last instance I saw was : > [@Not a fan of LT tanks](http://forum.formlabs.com/t/not-a-fan-of-lt-tanks/19478/37): > > There is a tab on the underside of the wiper arm that protrudes down past the main wiper edge. I cut it off when I first noticed it on my first tank. Formlabs claims this is necessary but I see it as a way to prematurely damage the surface of the tank. From what I have seen on the LT tanks they seem to have removed this “feature” in the new wiper, I don’t know if they removed it on the standard tank’s wiper as well since I haven’t ordered any recently. ---
**Author:** ![epicmcd](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.formlabs.com/epicmcd/32/9302_2.png) [@epicmcd](https://forum.formlabs.com/u/epicmcd)\ **Post date:** [October 4, 2018, 2:35pm UTC](https://forum.formlabs.com/t/dent-in-resin-tray-caused-by-wiper-arm/20676/3 "2018-10-04T14:35:01Z")
Thanks for that, I’ve just snipped mine off as with the first wipe for the new build (empty tray) I could see by the wipe pattern that it is going to ruin the tray (if it hasn’t already… I’m already going to have to avoid building in the dented area. ---
**Author:** ![billb](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.formlabs.com/billb/32/5587_2.png) [@billb](https://forum.formlabs.com/u/billb)\ **Post date:** [October 5, 2018, 8:21am UTC](https://forum.formlabs.com/t/dent-in-resin-tray-caused-by-wiper-arm/20676/4 "2018-10-05T08:21:29Z")
If the ‘dent’ is where the wiper parks it shouldn’t make any difference to a build, since it will be outside the area covered by the build platform. ---
**Author:** ![epicmcd](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.formlabs.com/epicmcd/32/9302_2.png) [@epicmcd](https://forum.formlabs.com/u/epicmcd)\ **Post date:** [October 5, 2018, 9:34am UTC](https://forum.formlabs.com/t/dent-in-resin-tray-caused-by-wiper-arm/20676/5 "2018-10-05T09:34:10Z")
Mine doesn’t park there, it parks in the middle. ---
**Author:** ![epicmcd](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.formlabs.com/epicmcd/32/9302_2.png) [@epicmcd](https://forum.formlabs.com/u/epicmcd)\ **Post date:** [October 5, 2018, 9:37am UTC](https://forum.formlabs.com/t/dent-in-resin-tray-caused-by-wiper-arm/20676/6 "2018-10-05T09:37:51Z")
Ish… this is where it parks ![image](https://us1.discourse-cdn.com/flex025/uploads/formlabs/original/2X/9/994dec4a154878fcefc80caa8624c034f99f54c3.jpg) ---
**Author:** ![billb](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.formlabs.com/billb/32/5587_2.png) [@billb](https://forum.formlabs.com/u/billb)\ **Post date:** [October 6, 2018, 9:33am UTC](https://forum.formlabs.com/t/dent-in-resin-tray-caused-by-wiper-arm/20676/7 "2018-10-06T09:33:17Z")
I think you need support to sort this for you. The wiper should park on right hand edge of the tank in line with the resin inlet. ---
**Author:** ![fantasy2](https://avatars.discourse-cdn.com/v4/letter/f/a88e4f/32.png) [@fantasy2](https://forum.formlabs.com/u/fantasy2)\ **Post date:** [October 6, 2018, 9:46am UTC](https://forum.formlabs.com/t/dent-in-resin-tray-caused-by-wiper-arm/20676/8 "2018-10-06T09:46:01Z")
He’s not using a LT tank. Parking in the middle is normal. ---
**Author:** ![epicmcd](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.formlabs.com/epicmcd/32/9302_2.png) [@epicmcd](https://forum.formlabs.com/u/epicmcd)\ **Post date:** [October 7, 2018, 3:01pm UTC](https://forum.formlabs.com/t/dent-in-resin-tray-caused-by-wiper-arm/20676/9 "2018-10-07T15:01:59Z")
Correct,… My LT tanks dock at the far right hand side. ---
**Author:** ![system](https://us1.discourse-cdn.com/flex025/uploads/formlabs/original/3X/5/b/5bc2bdf993ff27c2e0eecab5010b25626fbb327a.png) [@system](https://forum.formlabs.com/u/system)\ **Post date:** [October 14, 2018, 3:02pm UTC](https://forum.formlabs.com/t/dent-in-resin-tray-caused-by-wiper-arm/20676/10 "2018-10-14T15:02:04Z")
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