@abrahamstechnology: I see that Tai Hao is offering 280g APC switches. 280g?!? Is this for real?
Are any of the components of APC switches interchangeable with vintage Alps and/or Matias switches?
Are you using the Dupont teflon dry lube that is sold in plastic squeeze bottles (as opposed to the spray can variety)?
Have you tried molybdenum disulfide dry lube?
So far, I have been using Super Lube 51010 synthetic oil applied with a small brush very sparingly. It works wonders on Alps that are exhibiting binding when the key is pressed off-center and imparts an overall smoothness. However, as deeyay pointed out, lubing can change the personality of the switch.
abrahamstechnology wrote: ↑
Anyways, Ive figured out why some Matiases physically stick. It's the stems. They are too tight, and every every now and then you get a switch that is too tight to the point of the keycap warping out the slider and it catching on the housing/leaf.
I have just now encountered this problem with a KBP V60 Type R with Matias Click switches. I replaced the stock keycaps with doubleshots from a Northgate Omnikey 101. After the replacement, several keys would not spring back to their original starting positions. I replaced the top switch components with parts from some Matias Click switches purchased several years ago and the problem was seemingly solved. However, I noticed some of the other keys were displaying some partial sticking. I tried dye-sub PBT caps from the following boards -- IBM 5140, IBM P770, and SGI Granite -- all of these worked fine with no sticking.
I agree with your assessment. Some keycaps seem to cause the sliders to expand and to catch in the top housings. It appears to be an issue with the sliders and/or top switch housings.
In addition, the keycaps the KBP is using with their Matias-switch keyboards fit much too tightly -- the caps are extremely difficult to remove.