There’s been a lot of discussion about making the Foreman mobile as it’s too large for the mobile base.
I’ve modeled and now produced a replacement foot insert that will accept beefier 1/2" threaded leveling casters. I’ve also added additional webbing and increased the thickness of the bottom plate to support the weight.
I have attached some CAD drawings and a couple of pictures of the finished product.
I will be happy to share more once I have confirmed they work.
I ordered my Foreman on day one (#34311) but elected to wait until the frame was ready for delivery. That was a mistake as the frames are now ready but they are not making another batch of Foreman until next week
Once I have it in-hand an tested on the frame, i will share the file, or I might sell them. The casters are way oversized, but that’s a good approach anyway. If you’re interested in the file, reply and I will send it free (even if I eventually start selling the file or print)
Let me know if you have interest or questions and I would be happy to expand.
Yes, the smaller stems supplied with the machines (3/8" I believe) are too small for any heft casters.
The usual rule for a caster is that each caster should comfortably carry 2X it’s static load to be able to move well. So take total weight of machine, spindle, MDF, QCW and frame legs and divide by 4 and then double it.
I took the largest available as the larger rolling diameter of the caster makes moving easier too.
I’m also interested in receiving the files. I do have a 3D printer but was curious what material you would use to print it. Would PLA+ work or do you recommend something else? Thank you for coming up with a good solution to this problem.
Update attached. They WORK.
The PETG printed parts require ONE wrap of electrical tape to be a tight fit in the base of the leg. I’m debating whether to increase the scale of the print by a whisker or leave the print as-is. The electrical tape provide a good frictional surface and removing the insert would be easier as some gentle heat (hairdryer) to the metal leg would soften the tape’s adhesive and the insert would slide out.
The other issue is that the threads as modelled are correct but tight. I found that I needed to clean them up with a thread chaser. A 1/2 steel threaded insert would be easier but a thread chaser works fine and there is no need for a nylock nut as the PETG print acts as the same.
The large base of the caster nicely supports the edges of the print so that the load of the CNC is transferred to the walls of the legs.
Finally wobble, there is a slight increase in wobble as the casters I selected have a rubber foot, but I would say it’s insignificant. It’s is not a night / day difference, it’s very slight (these casters after all are designed to support equipment and many large CNCs use them (I was told by another of our users here that he worked with a CNC that used 8 of the largest spec ones on a $400,000 CNC)
If you need to deploy the casters, how do you get the one in the corner up against both walls? This is why I didn’t go for casters tied to leveling feet and instead kept them separate, allowing all the casters to be deployed at one time on a frame.