Search found 139 matches

by miken
Fri Oct 08, 2021 9:00 pm
Forum: Woodworking Tool Review
Topic: This looks interesting
Replies: 17
Views: 551

Re: This looks interesting

I made a poor mans version of this tool using two MagDRO caliper holders and some wood. I used it a little before I repaired my fence which didn't really lock straight or predictably. IIRC I had a washer in the wrong place and it affected how the fence self-aligned just prior to locking. This device...
by miken
Mon Oct 04, 2021 8:44 pm
Forum: Maintenance and Repair
Topic: Idler Eccentric bushing
Replies: 5
Views: 194

Re: Idler Eccentric bushing

Had to install a new drive sleave assembly on my Mark V... Problem...finally got the poly v belt on but cannot get the idler eccentric to go back in without pushing the idler shaft bearing and idler shaft thru... Help... IIRC it needs to be installed from the inside. I hold the sheave with the belt...
by miken
Mon Oct 04, 2021 8:25 pm
Forum: Maintenance and Repair
Topic: Idler Eccentric bushing
Replies: 5
Views: 194

Re: Idler Eccentric bushing

Between the two bearings in the eccentric is a spacer. It's about centered between the outer and inner bearings. There is a setscrew in the side of the eccentric that you tighten to hold that spacer in place. Sounds like that setscrew may need to be tightened. See the bottom two pictures on this pag...
by miken
Fri Oct 01, 2021 8:19 pm
Forum: Maintenance and Repair
Topic: Mark VII Low Speed Too Fast
Replies: 48
Views: 1016

Re: Mark VII Low Speed Too Fast

dusty wrote: Fri Oct 01, 2021 6:08 pm Do you also have a Mark 5/V. The Mark VII may very well be different.
Confusion between models is the very reason that I wish this forum was more strategically divided.
Sorry Dusty, I don't have a Mark 5/V. The spacing on my Mark VII is 9 1/8" as well as I can measure it.

Mike -
by miken
Fri Oct 01, 2021 3:54 pm
Forum: Maintenance and Repair
Topic: Mark VII Low Speed Too Fast
Replies: 48
Views: 1016

Re: Mark VII Low Speed Too Fast

I'd be real interested in hearing from others about how these dimensions compare to other machines. I can grab a few dimensions for you, my headstock is apart. I am pretty sure the center to center on mine is 9 1/8", but I read in another post where JPG measured 9 3/8", so I will remeasur...
by miken
Fri Oct 01, 2021 8:52 am
Forum: Maintenance and Repair
Topic: Mark VII Low Speed Too Fast
Replies: 48
Views: 1016

Re: Mark VII Low Speed Too Fast

An unintended effect of the washer is the slight misalignment of the pulleys. This would increase the 'pull' of the belt on the motor pulley and cause it to open slightly further thus lowering the resultant rpm. The intended effect is to close the idler pulley. That creates the difference of the ca...
by miken
Fri Oct 01, 2021 8:46 am
Forum: Maintenance and Repair
Topic: Mark VII Low Speed Too Fast
Replies: 48
Views: 1016

Re: Mark VII Low Speed Too Fast

Can the idler sheave (on a MarkVII) be moved back and forth laterallyon the idler shaft (with respect to the eccentric??? On my Mark 5/Vs, the idler sheave is locked (laterally) between two sping washers. Yes, it can float or slide. It stops when it touches the snap ring next to the eccentric inner...
by miken
Thu Sep 30, 2021 9:24 pm
Forum: Maintenance and Repair
Topic: Mark VII Low Speed Too Fast
Replies: 48
Views: 1016

Re: Mark VII Low Speed Too Fast

That 710 rpm? Looks very reasonable. How about dial calibration? How about other end(fast)? I don't dare test the rpm at high speed with the Starrett mechanical rpm meter. I read online it was never really intended to go much above 2000 rpm. To be honest, I have never run this machine at full high....
by miken
Thu Sep 30, 2021 9:02 pm
Forum: Maintenance and Repair
Topic: Mark VII Low Speed Too Fast
Replies: 48
Views: 1016

Re: Mark VII Low Speed Too Fast

Metric belts seem to come in 10, 13, 17, 22 mm widths. Yes, I have searched a little and haven't found anything yet either. I have a clausing lathe belt that measures 0.51" but its 36" long, and still not wide enough. Maybe clausing has some other options? I appreciate your willingness to...
by miken
Thu Sep 30, 2021 8:08 pm
Forum: Maintenance and Repair
Topic: Mark VII Low Speed Too Fast
Replies: 48
Views: 1016

Re: Mark VII Low Speed Too Fast

Yes, my mistake, I forgot I moved that bit between that bottom pic taken yesterday and the top pic from today, but the results from today still stand. I haven't rotated the speed control since I took the top pic with the washer installed, and the cam looks pretty much the same now as the bottom pic ...