SP-300V Wiper Motor Replacement/Grinding Sound

A while back I had used the infamous translucent white wiper blades and would get a grinding sound from them hitting the scraper. I had to live with it until I could get some black ones in. But I guess over time something has worn out as it is now even creating the grinding sound with the black wipers. Not sure if the gear is stripped on the motor or the screw has backed out (or even the motor has gotten week). But in any case the wipers currently won't go past the scraper so it looks like something needs replaced (I did replace the wipers and scrapers to eliminate that fix). I went ahead and ordered a motor, belt and gear to have before I tear everything apart. But...

1. Anything I'm missing that could fix this (like a belt adjustment)?
2. Any tips on getting to the motor? Quite buried in back so will require a lot of disassembly from what I can tell.

 

Thanks for all the tips. Looks like I have to pull off the circuit board panel in order to get anything.

 

That was a big waste of time. I pulled everything apart and all looked good except the belt. While the teeth on the belt (and gears) still looked good it feels quite loose and it definitely is misshapen from being around the gears for all these year. Went to put on my new belt but the one Digiprint sent me was wrong. The bag was right from what I needed but it appears the wrong belt was put in the bag since the numbers on it weren't matching up and it was about 10cm too short. I am hoping the belt is the issue since everything else looks good.

Anyone know what officially makes the grinding noise?

There is some discrepancy between my manual and the way the machine was together. On the shaft the manual shows the spring BETWEEN the wiper assembly and the serge mist plate. But it was assembled with the spring towards the front of the machine pushing the plate towards the wipers. Anyone know what is the correct way? I assume the manual is correct but I have never had this part of the machine apart that I am aware of.

 

Is there a recommended lubricant for this? I do feel the the rails could be the issue.

 

Nope...if anything it made it worse.

Digi-print supplies has jacking me around for months on parts so I am still dealing with the issue. That company used to be pretty good about getting me parts but they are a major joke these days. Sent me the wrong belt, didn't send me the pulley on the first order. So I reordered a new belt and some other things then they canceled that order without telling me and couldn't even give me a reason why. I kept being told my pulley would ship in the next few days at the latest. But never shipped, when asked about it for the 4th time they said they finally had it in stock and I could reorder it now...even though I already had paid for it in May. Stay away from using them at all cost! Finally just ordered the parts from various suppliers so waiting on everything to come in before I pull it all apart again.

 

In all honesty it hasn't been fixed. I have just been running it without the scraper for months now. This obviously requires a little more frequent cleaning but has been good so far. Now I have the parts but am afraid to jump into pulling it apart in case I need another part. With this pandemic not sure when I would get parts if I need them.

 

Still not fixed. As Jim said the stiff wipers can cause the noise problem. But mine is past that as I am using soft wipers now. At some point I was using the harder ones and that is probably got me where I am today. Just been too lazy to take apart.

Since it has been almost a year and haven't fixed it I really haven't had any issues. But I don't do many large prints so that may be what is saving me. I just manually clean everything a few times a month or when needed.

To answer your question: the scraper is the hard piece that cleans the wipers. Kind of hidden in the back of a door where the wipers slide to. You can see it in action if you stick something in the safety switch and remove the main cover. Just don't get hit by the head carriage!

 

That was a temporary fix for me too (used two old cutting blades) but then it went back to grinding. I got all the parts here that you replaced yours with so now I'm wondering if they will even fix it.