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Forum topic by Jujitsu posted 10-16-2017 03:18 PM 384 views 1 time favorited 10 replies Add to Favorites Watch
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Jujitsu

10 posts in 819 days


10-16-2017 03:18 PM

Hello all
I have 13 inch helical steel city planer, it’s produced 1/32 groves in the last few boards. These aren’t snipes or normal tool marks, it’s in hard maple so they don’t sand away so easy. It’s as though several knives are out of line so I’m cutting at different depths across the board; the knives are self indexing, set in properly and tight. I found the infeed roller has wear spot in the middle causing a slight void, can this cause the problem?


10 replies so far

View eflanders's profile

eflanders

215 posts in 1663 days


#1 posted 10-17-2017 12:05 AM

My guess is that you have a nicked cutter or two. Check the cutters in line with the ridge in the material.

View TheFridge's profile

TheFridge

8137 posts in 1298 days


#2 posted 10-17-2017 01:47 AM



My guess is that you have a nicked cutter or two. Check the cutters in line with the ridge in the material.

- eflanders


-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View JBrow's profile

JBrow

1250 posts in 732 days


#3 posted 10-17-2017 02:30 AM

Jujitsu,

I am not sure this could be a cause but it may be worth checking that each insert’s screw is properly torqued.

View Jujitsu's profile

Jujitsu

10 posts in 819 days


#4 posted 10-17-2017 02:33 PM

Thanks for the input all. Screw tourqe might be an issue not knowing if there is a spec; they’re all tight and all the knives were replaced about a month ago, no chips. The problem isn’t so much slight marks are left behind, there’s whole section of board that’s not being cut at the same depth

View bbasiaga's profile

bbasiaga

991 posts in 1807 days


#5 posted 10-17-2017 03:00 PM

Sawdust or something under some of the inserts, holding them up?

-- Part of engineering is to know when to put your calculator down and pick up your tools.

View pintodeluxe's profile

pintodeluxe

5421 posts in 2625 days


#6 posted 10-17-2017 04:49 PM

1+ about the sawdust under inserts causing issues. I blow out the insert sockets before rotating the cutters on my planer. The whole area needs to be clean when you perform surgery on your planer.

Also, don’t over-torque the screws. This can deform the insert and cause uneven planing.

Maybe a picture would help us diagnose the problem, but a nicked cutter can happen very easily. It results in a small, defined ridge on the board. You may see one, or there may be multiple ridges. Usually these ridges are very narrow, perhaps 1/16” wide.

A nicked cutter won’t cause a groove in your board. That is usually caused by misaligned or over-torqued inserts.

Does your machine use HSS or carbide inserts?

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View Jujitsu's profile

Jujitsu

10 posts in 819 days


#7 posted 10-17-2017 05:03 PM

Pintodelux nice free will reference
Again thanks to all for the help
Ill blow out the inserts and try backing off the screws. I’ll also post a pick and I use 2 sided carbide inserts

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Jujitsu

10 posts in 819 days


#8 posted 10-18-2017 12:05 AM

So I didn’t know inserts could be so temperamental. Blew them out backed off the tightening and ran a board through a few passes, things improved but still not quite right. Tried to include a pic no dice. If it helps the ridge is about 1/2 inch wide, high enough I can run a pencil point along it and runs the length of the board. It looks like two boards were joined and one edge is slightly higher

View TheFridge's profile

TheFridge

8137 posts in 1298 days


#9 posted 10-18-2017 12:25 AM

I went through the same thing with shelix inserts. Clean the seat and knives and make sure they’re set properly. A once over vacuuming beforehand would’ve solved most of my problems.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View JBrow's profile

JBrow

1250 posts in 732 days


#10 posted 10-18-2017 12:31 AM

Jujitsu,

Here is the manual for the Steel City Model No. 40200H 13” thickness planer. If this is the model of your thickness planer, the Torx screws for the cutter inserts is 48-50 inch-pounds (page 20).

http://steelcitytoolworks.com/media/wysiwyg/40200H-MANUAL.pdf

If this is not the model for your planer, it may be worthwhile finding the manual or contacting Steel City (or the maker of the spiral cutter head) to determine the proper torque setting. The torque specifications vary among spiral cutter heads.

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