- Joined
- Feb 5, 2013
- Messages
- 194
I'm slowly planning a grinder build based on
B
bjansen
's plans and build-along (thank you!), but bastardized heavily to use a base mount motor I already have and use just a few sizes of aluminum stock, since that cuts the cost a fair amount. These changes forced other changes, and so on. There are a few things I'd like help with.
First, does anyone have dimensions for a good over-center tension setup? I'd like to use one, but I'm not sure I should try unless I'm working from a proven design - I suspect a traditional setup would be easier to troubleshoot for a novice.
Second question: Can the drive wheel be mounted out a bit on the motor shaft, say by about 3/4"?
The set screw would still fully engage and no bearings are involved.
Last question: How much does the belt have to wrap around the tracking wheel for tracking to work well?
I'm trying to mount the motor a bit behind the chassis for a few reasons: so the junction box does not crowd the tool bar clamping handles, to keep the length of tool arms down.
Does this look OK?
Here is the original, which is more in line with other grinders I see online:
If it does matter I could move the motor up so the belt path looks more like grinders I see out there, but either the junction box crowds the tool arm clamp handles, or I have to drill and tap some really awkward holes on the motor housing for the fan shroud so I can flip the rotor and put the junction box in the rear:
Design so far:
I'd appreciate any feedback, especially anything that looks poorly thought out. I don't actually know what I'm doing, haven't built or even used a full size grinder but it's a fun project. In other words... Don't build this, it probably sucks in many ways I can't imagine. DO build the well proven bjansen design.
Right now it's coming in about $300 in material and hardware, or $630 with budget options for wheels, vfd, motor. Using better wheels, KBDA-27D and free motor, nice wiring it would cost about $850.
The VFD arrived a few days ago. I had planned on using a cheap import before realizing that wasn't as easy without 220 so I'll have to save a bit for the rest of the materials, but no going back now
[edited to clarify I meant "don't build this mess, I don't know what I'm doing. Build the real version"]
First, does anyone have dimensions for a good over-center tension setup? I'd like to use one, but I'm not sure I should try unless I'm working from a proven design - I suspect a traditional setup would be easier to troubleshoot for a novice.
Second question: Can the drive wheel be mounted out a bit on the motor shaft, say by about 3/4"?
The set screw would still fully engage and no bearings are involved.
Last question: How much does the belt have to wrap around the tracking wheel for tracking to work well?
I'm trying to mount the motor a bit behind the chassis for a few reasons: so the junction box does not crowd the tool bar clamping handles, to keep the length of tool arms down.
Does this look OK?
Here is the original, which is more in line with other grinders I see online:
If it does matter I could move the motor up so the belt path looks more like grinders I see out there, but either the junction box crowds the tool arm clamp handles, or I have to drill and tap some really awkward holes on the motor housing for the fan shroud so I can flip the rotor and put the junction box in the rear:
Design so far:
I'd appreciate any feedback, especially anything that looks poorly thought out. I don't actually know what I'm doing, haven't built or even used a full size grinder but it's a fun project. In other words... Don't build this, it probably sucks in many ways I can't imagine. DO build the well proven bjansen design.
Right now it's coming in about $300 in material and hardware, or $630 with budget options for wheels, vfd, motor. Using better wheels, KBDA-27D and free motor, nice wiring it would cost about $850.
The VFD arrived a few days ago. I had planned on using a cheap import before realizing that wasn't as easy without 220 so I'll have to save a bit for the rest of the materials, but no going back now
[edited to clarify I meant "don't build this mess, I don't know what I'm doing. Build the real version"]
Last edited: