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Variable Speed Planer Feeding on Inca 560 Jointer/Planer

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Forum topic by GrizzlyBagWorks posted 09-19-2016 06:45 PM 1271 views 0 times favorited 4 replies Add to Favorites Watch
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GrizzlyBagWorks

63 posts in 1051 days


09-19-2016 06:45 PM

Hi Guys, I’m hoping to get some feedback/ideas from some other members here that are more clever than myself. I’ve posted on Inca Yahoo forum but didn’t really get many responses.

I’m in the process of dialing in an Inca 560 Jointer/Planer Combo Machine. If you’re not familiar with these machines they were built in Switzerland, have aluminum tables, 2HP motors, 10-1/4” jointing and planing capacity. They’re excellent machines but have a few ‘quarks’.

One of these ‘quarks’ is a plastic gear for the planer feed system that reduces the 1725RPM of the motor down dramatically to allow for a 11.5ft/min and 16ft/min planer feed speed. The problem is this gear has to be lubed to keep it cool, light cuts have to be made and you can’t run the machine for extended periods or it will literally melt. Replacements are still available but they aren’t getting cheaper.

Sooo…I decided to try a different approach. A separate motor to drive the feed mechanism and eliminate the gear all together. I used a brushless DC sewing machine motor and while it works the feeding is still too fast. I need to reduce it by at least 50%, preferable even more—like 33% of current speed.

My thoughts were to add an additional gear shaft.

I would need:
- 2 metric pillow block bearings (10mm bore) (~$7.50 each)
- 10mm shaft (<$7.50)
- 10t Sprocket ($11.50)
- 30t Sprocket ($28).

With that combination I can get the following speeds from the machine:

~10ft/m (200rpm), (Stock Low=11.5ft/min)
~16ft/m(300rpm) (Stock High =16ft/min)
~21ft/m (400rpm)

The extra gearing will give me extra torque as well so I shouldn’t have a problem with bogging down. A 10t sprocket is pretty small though. I’d prefer a 15t but then I’d need a 45t sprocket on the other end. I’m having trouble finding a 15/45t pair that have the same shaft diameter.

I’m pretty sure I can get the system to work with that setup but at that point I’m in for this conversion for a little over $200. Not sure if it’s worth it.

I was thinking about just getting a slow speed motor that would run at 75RPM but I can’t seem to find one at a reasonable price that would work.

Does anyone have any other ideas or a source for a slow speed gear motor (75rpm)? If the sewing machine motor doesn’t work out it’s no big deal since I can use it on an industrial sewing machine I have.

Thanks guys!!

www.youtube.com/v/3BQJdEV6cxM


4 replies so far

View Googlestein's profile

Googlestein

1 post in 37 days


#1 posted 10-27-2016 03:58 AM

Here’s a few thoughts;

1) Buy yourself ball or needle bearing to go onto the cutter head shaft (between the pulley and the journal bearing) to keep the chain off the cutter head shaft. The chain can ride on the bearing directly if you’ve got some spacers to position it under the chain, or you can let the the chain position the bearing using a grooved OD sleeve on the bearing (bearing just floats on the shaft).

2) Add a jack shaft to change the chain speed. You can mount up a couple sprockets side-by-side. The ratio of those sprockets changes the chain speed. This idea (like your own) has no accident protection IE; if you hit something, there is no slippage.

3) For added protection, consider driving the jack shaft with a pulley & a cheap belt. Example; a 2” x 3/8 V-belt pulley drives a 4” pulley (diecast zinc from TSC pulleys + belt for under $20 total).

View GrizzlyBagWorks's profile

GrizzlyBagWorks

63 posts in 1051 days


#2 posted 10-27-2016 05:14 AM

Thanks for the reply!

Great idea regarding the bearing over the shaft! I’ll have to look into it further.

For the motor I actually ended up going a different direction with the modification. I ended up buying a DC gear motor with a speed controller and a 28t gear. The new motor maxes out at 57rpm so I’ll have plenty of torque and a huge adjustment range with the speed control. The price was more than I wanted to spend but I think I’ll be happier with this setup in the long run.

As for accident protection, I think I have it covered. I had the 28t gear bored out to 5/8” for the motor and had 3/16” keyway cut but I think I’m actually going skip on using the key and just tap and use a nylon set screw straight on the shaft. That way if I get a jam the set screw with just break free and but the time the shaft spins around the right angle on the keyway on motor shaft will shear any protrusion of the set screw so that the gear is spinning completely free. That’s the idea anyway. I’ll have to test it to see if I can get enough holding power from the plastic. If not maybe I’ll try a brass tipped version.

I’ll update this thread once I get everything together.

View AlaskaGuy's profile

AlaskaGuy

2406 posts in 1769 days


#3 posted 10-27-2016 07:30 AM

I had an Inca for a few years until I realized I wanted something a little heaver duty and longer beds.
During that time I went through a couple of those plastic/nylon gears. When I complained about the gear I was told
it was an engineered weak link in the system so other more troublesome and expensive parts didn’t break.

I don’t know if this is true or just a manufacture way of trying to pacify a customer.

-- Alaskan's for Global warming!

View JBrow's profile

JBrow

814 posts in 380 days


#4 posted 10-28-2016 01:46 AM

GrizzlyBagWorks,

Given the pricing, I am not sure you are interested but I mention Woodmaster Tools as a source for feed motors. The motor is, I think a DC 1/6 hp 58 RPM motor which, on a Woodmaster planer with pulleys and a belt, produces infinitely variable feed rates from 0’ to 16’ per minute ($225). A variable AC to DC controller is also required ($120). The controller plugs into 120 V A/C.

Motor
https://www.woodmastertools.com/NS/accessdetail.cfm?PID=793

Controller
https://www.woodmastertools.com/NS/accessdetail.cfm?PID=794

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